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Creekview Add PD-SY210420
Request for CLOMR Grapevine Creek Pletta Property at 146 East Bethel Road Coppell, Texas Givler Engineering, Inc. Project No. PLETTA-001D April 20, 2021 Texas Firm No. 2573 L. David Givler, MSCE, PE Givler Engineering, Inc. 515 Busby Drive, Suite 101 San Antonio, Texas 78209 (210) 342-3991 x221 Request for CLOMR Grapevine Creek Pletta Property at 146 East Bethel Road Coppell, Texas Givler Engineering, Inc. Project No. PLETTA-001D April 20, 2021 Texas Firm No. 2573 L. David Givler, MSCE, PE Givler Engineering, Inc. 515 Busby Drive, Suite 101 San Antonio, Texas 78209 (210) 342-3991 x221 INDEX I. Forms A. Overview & Concurrence Form (Form 1) B. Riverine Hydrology & Hydraulics Form (Form 2) II. Overview III. Hydrology IV. Hydraulics A. Discussion and Comparison of Water Surface Elevations V. Documents & Drawings A. Effective HEC-RAS 4.1.0 Output B. Corrected Effected HEC-RAS 4.1.0 Output C. Revised HEC-RAS 4.1.0 Output D. Effective Floodway HEC-RAS 4.1.0 Output E. Corrected Effective Floodway HEC-RAS 4.1.0 Output F. Revised Floodway HEC-RAS 4.1.0 Output G. LOMR Case no. 16-06-0213P H. Lawn Maintenance Commitment Dated 3/29/2021 I. Environmental Report J. Annotated FIRM K. FEMA Topographic Work Map Revised 1/07/2021 L. 1% AC Fully Developed Topographic Work Map Revised M. Concept Grading Plan I. Forms b.The area of revision encompasses the following structures (check all that apply) Structures: 0 Bridge/Culvert 0 Channelization □Dam 0 Levee/Floodwall �Fill 0 Other (Attach Description) 6.� Documentation of ESA compliance is submitted (required to initiate CLOMR review). Please refer to the instructions for more information. C.REVIEW FEE Has the review fee for the appropriate request category been included? � Yes Fee amount: $6,500 0 No, Attach Explanation Please see the DHS-FEMA Web site at http ://www.fema.gov/plan/preven Ufh m/frm fees.shim for Fee Amounts and Exemptions. D.SIGNATURE All documents submitted in support of this request are correct to the best of my knowledge. I understand that any false statement may be punishable by fine or imprisonment under Title 18 of the United States Code, Section 1001. Name: L. David Givler, MSCE, PE Company: Givler Engineering, Inc. Mailing Address: Daytime Telephone No.: 210-342-3991 Fax No.: N/A 515 Busby Drive n f'irx x221 Suite 101 'J San Antonio, Texas 78209 E-M�ddress: givler@givlerengineering.com Signature of Requester (require� n � J .1 J �� u� I Date: 09/23/2020 As the community official responsible for floodplain management, I hereby ack�edge that we have received and reviewed this Letter of Map Revision (LOMR) or conditional LOMR request. Based upon the community's review, we find the completed or proposed project meets or is designed to meet all of the community floodplain management requirements, including the requirements for when fill is placed in the regulatory floodway, and that all necessary Federal, State, and local permits have been, or in the case of a conditional LOMR, will be obtained. For Conditional LOMR requests, the applicant has docu mented Endangered Species Act (ESA) compliance to FEMA prior to FEMA's review of the Conditional LOMR application. For LOMR requests, I acknowledge that compliance with Sections 9 and 10 of the ESA has been achieved independently of FEMA's process. For actions authorized, funded, or being carried out by Federal or State agencies, documentation from the agency showing its compliance with Section 7(a)(2) of the ESA will be submitted. In addition, we have determined that the land and any existing or proposed structures to be removed from the SFHA are or will be reasonably safe from flooding as defined in 44CFR 65.2(c), and that we have available upon request by FEMA, all analyses and documentation used to make this determination. Community Official's Name and Title: Kumar Gali, PE, CFM, D.WRE - Assistant Director of Public Works I Community Name: City of Coppell, Texas Mailing Address: Daytime Telephone No.: 972-304-3680 Fax No.: 972-304-3673 P.O. Box 9478 Coppell, Texas 75019 E-Mail Address: kgali@coppelltx.gov Community Official's Signature (required): I Date: CERTIFICATION BY REGISTERED PROFESSIONAL ENGINEER AND/OR LAND SURVEYOR This certification is to be signed and sealed by a licensed land surveyor, registered professional engineer, or architect authorized by law to certify elevation information data, hydrologic and hydraulic analysis, and any other supporting information as per NFIP regulations paragraph 65.2(b) and as described in the MT-2 Forms Instructions. All documents submitted in support of this request are correct to the best of my knowledge. I understand that any false statement may be punishable by fine or imprisonment under Title 18 of the United States Code, Section 1001. Certifier's Name: L. David Givler, MSCE, PE License No.: 73842 Expiration Date: 12/31/2020 Company Name: Givl r En inee (\c. I� Telephone No.: 210-342-3991 Fax No.: NIA x221 f M��� Signal�: Dale: E-Mail Address: givler@givlerengineering.com J --10/26/2020 / v FEMA Form 086-0-27, (2/2011) - Previously FEMA Form 81-89 MT-2 Form 1 Page 2 of 3 FEMA Form 086-0-27A, (2/2011) Previously FEMA Form 81-89 MT-2 Form 2 Page 1 of 3 U.S. DEPARTMENT OF HOMELAND SECURITY FEDERAL EMERGENCY MANAGEMENT AGENCY RIVERINE HYDROLOGY & HYDRAULICS FORM O.M.B No. 1660-0016 Expires February 28, 2014 PAPERWORK BURDEN DISCLOSURE NOTICE Public reporting burden for this form is estimated to average 3.5 hours per response. The burden estimate includes the time for reviewing instructions, searching existing data sources, gathering and maintaining the needed data, and completing, reviewing, and submitting the form. You are not required to respond to this collection of information unless a valid OMB control number appears in the upper right corner of this form. Send comments regarding the accuracy of the burden estimate and any suggestions for reducing this burden to: Information Collections Management, Department of Homeland Security, Federal Emergency Management Agency, 1800 South Bell Street, Arlington VA 20958-3005, Paperwork Reduction Project (1660-0016). Submission of the form is required to obtain or retain benefits under the National Flood Insurance Program. Please do not send your completed survey to the above address. PRIVACY ACT STATEMENT AUTHORITY: The National Flood Insurance Act of 1968, Public Law 90-448, as amended by the Flood Disaster Protection Act of 1973, Public Law 93-234. PRINCIPAL PURPOSE(S): This information is being collected for the purpose of determining an applicant's eligibility to request changes to National Flood Insurance Program (NFIP) Flood Insurance Rate Maps (FIRM). ROUTINE USE(S): The information on this form may be disclosed as generally permitted under 5 U.S.C § 552a(b) of the Privacy Act of 1974, as amended. This includes using this information as necessary and authorized by the routine uses published in DHS/FEMA/NFIP/LOMA-1 National Flood Insurance Program (NFIP); Letter of Map Amendment (LOMA) February 15, 2006, 71 FR 7990. DISCLOSURE: The disclosure of information on this form is voluntary; however, failure to provide the information requested may delay or prevent FEMA from processing a determination regarding a requested change to a NFIP Flood Insurance Rate Maps (FIRM). Flooding Source: Grapevine Creek Note: Fill out one form for each flooding source studied A. HYDROLOGY 1. Reason for New Hydrologic Analysis (check all that apply) Not revised (skip to section B) No existing analysis Improved data Alternative methodology Proposed Conditions (CLOMR) Changed physical condition of watershed 2. Comparison of Representative 1%-Annual-Chance Discharges Location Drainage Area (Sq. Mi.) Effective/FIS (cfs) Revised (cfs) 3. Methodology for New Hydrologic Analysis (check all that apply) Statistical Analysis of Gage Records Precipitation/Runoff Model Specify Model: Regional Regression Equations Other (please attach description) Please enclose all relevant models in digital format, maps, computations (including computation of parameters), and documentation to support the new analysis. 4. Review/Approval of Analysis If your community requires a regional, state, or federal agency to review the hydrologic analysis, please attach evidence of approval/review. 5. Impacts of Sediment Transport on Hydrology Is the hydrology for the revised flooding source(s) affected by sediment transport? Yes No If yes, then fill out Section F (Sediment Transport) of Form 3. If No, then attach your explanation.. FEMA Form 086-0-27A, (2/2011) Previously FEMA Form 81-89 MT-2 Form 2 Page 2 of 3 B. HYDRAULICS 1. Reach to be Revised Description Cross Section Water-Surface Elevations (ft.) Effective Proposed/Revised Downstream Limit* 578' downstream of Denton Tap Rd 25080 483.48 483.48 Upstream Limit* 522' downstream of Denton Tap Rd 25133 484.04 484.04 *Proposed/Revised elevations must tie-into the Effective elevations within 0.5 foot at the downstream and upstream limits of revision. 2. Hydraulic Method/Model Used: HEC-RAS 3. Pre-Submittal Review of Hydraulic Models* DHS-FEMA has developed two review programs, CHECK-2 and CHECK-RAS, to aid in the review of HEC-2 and HEC-RAS hydraulic models, respectively. We recommend that you review your HEC-2 and HEC-RAS models with CHECK-2 and CHECK-RAS. 4. Models Submitted Natural Run Floodway Run Datum Duplicate Effective Model* File Name: EFFLOMR Plan Name: Effective File Name: EFFLOMR Plan Name: Effective FW NAVD88 Corrected Effective Model* File Name: PLETTA-001D Plan Name: Corrected Effective File Name: PLETTA-001D Plan Name: Correct Effect FW NAVD88 Existing or Pre-Project Conditions Model File Name: __________ Plan Name: __________ File Name: __________ Plan Name: __________ __________ Revised or Post-Project Conditions Model File Name: PLETTA-001D Plan Name: Revised File Name: PLETTA-001D Plan Name: Revised FW NAVD88 Other - (attach description) File Name: ______________ Plan Name: ______________ File Name: ______________ Plan Name: ______________ __________ * For details, refer to the corresponding section of the instructions. Digital Models Submitted? (Required) C. MAPPING REQUIREMENTS A certified topographic work map must be submitted showing the following information (where applicable): the boundaries of the effective, existing, and proposed conditions 1%-annual-chance floodplain (for approximate Zone A revisions) or the boundaries of the 1%- and 0.2%-annual-chance floodplains and regulatory floodway (for detailed Zone AE, AO, and AH revisions); location and alignment of all cross sections with stationing control indicated; stream, road, and other alignments (e.g., dams, levees, etc.); current community easements and boundaries; boundaries of the requester's property; certification of a registered professional engineer registered in the subject State; location and description of reference marks; and the referenced vertical datum (NGVD, NAVD, etc.). Digital Mapping (GIS/CADD) Data Submitted (preferred) Topographic Information: 2001 LiDAR & 2015 on-site survey Source: NCTCOG LiDAR & GSI Topographic survey Date: 2001 & 2015 Accuracy: 0.1 to 0.05 feet respectively Note that the boundaries of the existing or proposed conditions floodplains and regulatory floodway to be shown on the revised FIRM and/or FBFM must tie-in with the effective floodplain and regulatory floodway boundaries. Please attach a copy of the effective FIRM and/or FBFM, at the same scale as the original, annotated to show the boundaries of the revised 1%-and 0.2%-annual-chance floodplains and regulatory floodway that tie-in with the boundaries of the effective 1%-and 0.2%-annual-chance floodplain and regulatory floodway at the upstream and downstream limits of the area on revision. Annotated FIRM and/or FBFM (Required) FEMA Form 086-0-27A, (2/2011) Previously FEMA Form 81-89 MT-2 Form 2 Page 3 of 3 D. COMMON REGULATORY REQUIREMENTS* 1. For LOMR/CLOMR requests, do Base Flood Elevations (BFEs) increase? Yes No a. For CLOMR requests, if either of the following is true, please submit evidence of compliance with Section 65.12 of the NFIP regulations: The proposed project encroaches upon a regulatory floodway and would result in increases above 0.00 foot compared to pre-project conditions. The proposed project encroaches upon a SFHA with or without BFEs established and would result in increases above 1.00 foot compared to pre-project conditions. b. Does this LOMR request cause increase in the BFE and/or SFHA compared with the effective BFEs and/or SFHA? Yes No If Yes, please attach proof of property owner notification and acceptance (if available). Elements of and examples of property owner notifications can be found in the MT-2 Form 2 Instructions. 2. Does the request involve the placement or proposed placement of fill? Yes No If Yes, the community must be able to certify that the area to be removed from the special flood hazard area, to include any structures or proposed structures, meets all of the standards of the local floodplain ordinances, and is reasonably safe from flooding in accordance with the NFIP regulations set forth at 44 CFR 60.3(A)(3), 65.5(a)(4), and 65.6(a)(14). Please see the MT-2 instructions for more information. 3. For LOMR requests, is the regulatory floodway being revised? Yes No If Yes, attach evidence of regulatory floodway revision notification. As per Paragraph 65.7(b)(1) of the NFIP Regulations, notification is required for requests involving revisions to the regulatory floodway. (Not required for revisions to approximate 1%-annual-chance floodplains [studied Zone A designation] unless a regulatory floodway is being established. Elements and examples of regulatory floodway revision notification can be found in the MT-2 Form 2 Instructions.) 4. For CLOMR requests, please submit documentation to FEMA and the community to show that you have complied with Sections 9 and 10 of the Endangered Species Act (ESA). For actions authorized, funded, or being carried out by Federal or State agencies, please submit documentation from the agency showing its compliance with Section 7(a)(2) of the ESA. Please see the MT-2 instructions for more detail. * Not inclusive of all applicable regulatory requirements. For details, see 44 CFR parts 60 and 65. II. Overview The Pletta family began construction on a new house on Lot 2R of the Creek View Phase II Addition subdivision, the address being 146 E. Bethel Road, Coppell, Texas. During construction, a survey error caused the foundation of the new house and adjoining fill to be constructed within the 1% AC floodplain. This CLOMR request has been developed to demonstrate that the fully developed fill encroachment will not have a detrimental impact on the BFE and floodplain. Subsequent to obtaining FEMA approval and completing construction of the encroachment, a LOMR request will be submitted to show that the new house and adjoining fill will be outside of the revised floodplain boundary. LOMR Case no. 16-06-0213P was used for the corrected effective and the revised conditions modeling. The HEC-RAS models use effective flowrates. No flowrates were changed for the effective, revised or the fully developed modeling. III. Hydrology The hydrology was not modified. The hydrology from approved LOMR Case No. 16-06-0213P was adopted. The 1% AC Fully Developed flowrate from the approved LOMR Case No. 16-06-0213P was also adopted. IV. Hydraulics Effective Model The Effective hydraulic model was adopted from LOMR Case no. 16-06-0213P, dated October 3, 2020. Corrected Effective Model The corrected effective model was developed by operating the effective model with HEC-RAS HEC-RAS 4.1.0 as with LOMR case no. 16-06-0213P. The corrected effective model generated water surface elevations identical to the effective model. Table 1: comparison of corrected effective and effective WSELs 1%AC - Water Surface Elevations (ft) River (1) Effective (2) Corrected (2)-(1) Station Effective Increase 25470 485.98 485.98 0 25370 484.89 484.89 0 25133 484.04 484.04 0 25113 483.46 483.46 0 25080 483.48 483.48 0 25040 483.22 483.22 0 25000 483.23 483.23 0 24000 483.70 483.70 0 Revised Model The Revised model was developed by adding obstructions to the cross sections in the Corrected Effective model. The obstructions were added to cross sections 25080, 25113, and 25133 to represent a retaining wall, earth and fill on Lot 2R. The top elevations for the retaining wall are over a foot above the 1% AC, 0.2% AC and 1% fully developed. The top of all retaining walls and proposed fill located in the effective floodplain will exceed the fully developed 1% AC water surface elevation of 485.99. The finished floor of the proposed house is proposed to 487.47, which exceeds the 1% AC water surface elevation by 3.99 feet: exceeds the 0.2% AC water surface elevation by 2.54 feet: and exceeds the 1% AC fully developed by 1.48 feet. The proposed changes will reduce the roughness in the backyard of Lot 2R. From the toe of the proposed retaining wall to the limit of the floodway a Manning’s n value of 0.04 was used to represent well maintained short grass. The owner has committed to maintaining this area. The proposed revisions cause no increase in the WSEL for the 1% annual chance and the 100- year fully developed floods. Table 2: comparison of revised and corrected effective for the 1% AC WSELs 1%AC - Water Surface Elevations (ft) River (1) Corrected (2) Revised (2)-(1) Station Effective Increase 25470 485.98 485.98 0 25370 484.89 484.89 0 25133 484.04 484.04 0 25113 483.46 483.46 0 25080 483.48 483.48 0 25040 483.22 483.22 0 25000 483.23 483.23 0 24000 483.70 483.70 0 Table 3: comparison of revised and corrected effective 100-year fully developed WSELs 100-yr FD - Water Surface Elevations (ft) River (1) Corrected (2) Revised (2)-(1) Station Effective Increase 25470 488.29 488.29 0 25370 487.15 487.14 -0.01 25133 486.47 486.47 0 25113 486.02 486.02 0 25080 486 486 0 25040 485.64 485.64 0 25000 485.72 485.72 0 24000 485.2 485.2 0 V. Documents & Drawings A. Effective HEC-RAS 4.1.0 Output HEC-RAS Plan: EFF River: RIVER-1 Reach: Reach-1Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) Reach-1 30130 10 YR6700.00 483.70 499.48500.59 0.004494 9.77 963.45 146.480.51Reach-1 30130 50 YR9400.00 483.70 501.84503.10 0.004545 10.76 1368.02 225.170.52Reach-1 30130 100 YR10500.00 483.70 502.60503.84 0.004315 10.86 1551.33 264.510.51Reach-1 30130 500 YR13400.00 483.70 504.28505.47 0.003871 11.08 2074.36 356.660.49Reach-1 30130 100 YR FD 14450.00 483.70 504.78505.96 0.003782 11.18 2261.42 386.410.49Reach-1 27900 10 YR6700.00 480.00 493.51494.25 0.002494 6.94 965.13 104.390.40Reach-1 27900 50 YR9400.00 480.00 495.85496.76 0.002506 7.68 1228.33 120.020.41Reach-1 27900 100 YR10500.00 480.00 496.60497.59 0.002579 8.00 1323.60 134.150.42Reach-1 27900 500 YR13400.00 480.00 498.35499.52 0.002697 8.72 1592.99 180.170.44Reach-1 27900 100 YR FD 14450.00 480.00 498.98500.20 0.002620 8.89 1716.08 208.140.44Reach-1 27620 10 YR6700.00 476.00 491.03492.42 0.005425 9.45 709.13 82.500.57Reach-1 27620 50 YR9400.00 476.00 493.43494.98 0.005061 10.04 1003.44 201.350.56Reach-1 27620 100 YR10500.00 476.00 494.46495.91 0.004375 9.86 1249.10 270.150.53Reach-1 27620 500 YR13400.00 476.00 497.19498.16 0.002740 8.57 2158.65 361.970.43Reach-1 27620 100 YR FD 14450.00 476.00 498.07498.90 0.002380 8.13 2477.65 367.100.40Reach-1 27570 10 YR6700.00 475.20 490.46 486.89 492.05 0.006220 10.12 662.04 89.560.62Reach-1 27570 50 YR9400.00 475.20 492.66 489.42 494.61 0.005605 11.22 838.01 265.700.61Reach-1 27570 100 YR10500.00 475.20 493.44 490.24 495.55 0.005499 11.66 900.67 350.670.61Reach-1 27570 500 YR13400.00 475.20 495.20 491.72 497.77 0.005526 12.87 1041.09 526.590.63Reach-1 27570 100 YR FD 14450.00 475.20 495.74 492.24 498.50 0.005611 13.33 1084.32 578.940.64Reach-1 27555 BridgeReach-1 27540 10 YR6700.00 475.00 489.29 486.84 491.17 0.008571 11.01 608.56 81.030.71Reach-1 27540 50 YR9400.00 475.00 491.49 489.25 493.63 0.007670 11.72 802.31 149.780.69Reach-1 27540 100 YR10500.00 475.00 492.27 490.02 494.52 0.007251 12.04 871.97 228.400.68Reach-1 27540 500 YR13400.00 475.00 493.81 491.42 496.54 0.007224 13.26 1010.48 390.680.70Reach-1 27540 100 YR FD 14450.00 475.00 494.15 491.87 497.14 0.007596 13.87 1041.48 425.440.72Reach-1 27400 10 YR6700.00 476.00 489.72490.01 0.001247 4.90 1662.52 193.540.29Reach-1 27400 50 YR9400.00 476.00 491.99492.35 0.001399 5.66 2167.09 255.390.31Reach-1 27400 100 YR10500.00 476.00 492.83493.21 0.001371 5.90 2393.45 288.350.31Reach-1 27400 500 YR13400.00 476.00 494.58495.03 0.001356 6.48 2970.37 397.430.32Reach-1 27400 100 YR FD 14450.00 476.00 495.02495.50 0.001391 6.71 3158.79 444.900.33Reach-1 27050 10 YR6700.00 474.00 487.67489.17 0.004599 10.01 768.79 121.690.54Reach-1 27050 50 YR9400.00 474.00 489.54491.40 0.005109 11.41 1021.73 151.960.58Reach-1 27050 100 YR10500.00 474.00 490.20 487.34 492.25 0.005363 11.99 1129.18 184.700.59Reach-1 27050 500 YR13400.00 474.00 491.68 489.15 494.03 0.005788 13.13 1515.40 322.550.62 HEC-RAS Plan: EFF River: RIVER-1 Reach: Reach-1 (Continued)Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) Reach-1 27050 100 YR FD 14450.00 474.00 491.80 489.46 494.44 0.006486 13.95 1553.66 330.720.66Reach-1 26880 10 YR7600.00 474.00 487.40488.51 0.003367 8.46 900.14 99.900.47Reach-1 26880 50 YR10600.00 474.00 489.18490.70 0.003856 9.93 1120.49 150.800.52Reach-1 26880 100 YR11900.00 474.00 489.82491.51 0.004053 10.49 1226.00 176.420.53Reach-1 26880 500 YR15100.00 474.00 491.21 486.94 493.26 0.004457 11.68 1533.44 271.590.56Reach-1 26880 100 YR FD 15500.00 474.00 491.54 487.11 493.55 0.004287 11.61 1626.50 295.430.56Reach-1 26700 10 YR7600.00 474.00 485.35487.25 0.009905 11.07 686.83 107.390.77Reach-1 26700 50 YR10600.00 474.00 487.46489.43 0.008621 11.28 942.56 141.950.74Reach-1 26700 100 YR11900.00 474.00 488.26490.26 0.008014 11.36 1067.78 169.090.72Reach-1 26700 500 YR15100.00 474.00 490.03492.04 0.007007 11.46 1431.88 256.560.69Reach-1 26700 100 YR FD 15500.00 474.00 490.53492.37 0.006285 11.03 1565.79 281.000.65Reach-1 26300 10 YR7600.00 470.00 484.67485.41 0.002364 6.94 1157.74 163.470.40Reach-1 26300 50 YR10600.00 470.00 486.75487.63 0.002485 7.67 1527.15 193.130.42Reach-1 26300 100 YR11900.00 470.00 487.57488.50 0.002497 7.90 1691.56 208.080.42Reach-1 26300 500 YR15100.00 470.00 489.27490.35 0.002603 8.54 2139.03 332.800.44Reach-1 26300 100 YR FD 15500.00 470.00 489.87490.85 0.002330 8.24 2345.18 364.440.42Reach-1 26170 10 YR7600.00 472.00 484.35485.05 0.002364 6.83 1258.42 213.380.40Reach-1 26170 50 YR10600.00 472.00 486.49487.27 0.002163 7.34 1734.22 232.270.39Reach-1 26170 100 YR11900.00 472.00 487.33488.13 0.002093 7.52 1932.62 241.290.39Reach-1 26170 500 YR15100.00 472.00 489.02489.97 0.002158 8.23 2391.39 326.670.40Reach-1 26170 100 YR FD 15500.00 472.00 489.63490.52 0.001924 7.97 2601.43 356.160.38Reach-1 25820 10 YR7600.00 470.00 484.23484.47 0.000811 4.11 2188.59 305.910.24Reach-1 25820 50 YR10600.00 470.00 486.42486.69 0.000797 4.43 2898.96 344.740.24Reach-1 25820 100 YR11900.00 470.00 487.28487.56 0.000792 4.55 3204.11 367.330.24Reach-1 25820 500 YR15100.00 470.00 489.04489.36 0.000796 4.87 3897.34 418.460.25Reach-1 25820 100 YR FD 15500.00 470.00 489.67489.97 0.000718 4.73 4165.81 442.620.23Reach-1 25725 10 YR7600.00 472.00 483.47484.21 0.002868 6.88 1104.59 140.880.43Reach-1 25725 50 YR10600.00 472.00 485.56486.43 0.002750 7.48 1441.59 190.750.44Reach-1 25725 100 YR11900.00 472.00 486.40487.30 0.002615 7.66 1611.96 217.590.43Reach-1 25725 500 YR15100.00 472.00 488.08489.10 0.002421 8.18 2024.12 275.660.42Reach-1 25725 100 YR FD 15500.00 472.00 488.80489.73 0.002052 7.85 2241.11 323.750.39Reach-1 25685 10 YR7600.00 470.00 483.17484.07 0.003332 7.61 998.31 121.560.47Reach-1 25685 50 YR10600.00 470.00 485.18486.28 0.003687 8.41 1261.09 142.950.50Reach-1 25685 100 YR11900.00 470.00 486.00487.15 0.003769 8.60 1383.02 154.140.51Reach-1 25685 500 YR15100.00 470.00 487.65488.95 0.003438 9.19 1695.89 228.620.50 HEC-RAS Plan: EFF River: RIVER-1 Reach: Reach-1 (Continued)Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) Reach-1 25685 100 YR FD 15500.00 470.00 488.44489.61 0.002814 8.73 1892.15 263.380.46Reach-1 25550 10 YR7500.00 470.00 483.12483.87 0.002645 6.96 1077.60 125.940.42Reach-1 25550 50 YR10500.00 470.00 485.12486.07 0.002958 7.80 1345.92 144.070.45Reach-1 25550 100 YR11800.00 470.00 485.93486.94 0.003032 8.05 1466.26 152.630.46Reach-1 25550 500 YR15100.00 470.00 487.57488.76 0.003037 8.75 1761.52 208.690.47Reach-1 25550 100 YR FD 16100.00 470.00 488.30489.47 0.002787 8.71 1923.06 231.580.45Reach-1 25500 10 YR7500.00 470.00 483.35 475.61 483.68 0.000795 4.61 1674.54 165.950.24Reach-1 25500 50 YR10500.00 470.00 485.39 476.95 485.84 0.000889 5.44 2000.76 172.610.26Reach-1 25500 100 YR11800.00 470.00 486.21 477.46 486.71 0.000919 5.75 2131.11 175.270.27Reach-1 25500 500 YR15100.00 470.00 487.86 478.72 488.51 0.001036 6.57 2395.32 180.670.29Reach-1 25500 100 YR FD 16100.00 470.00 488.57 479.07 489.25 0.001015 6.69 2508.60 182.980.29Reach-1 25485 BridgeReach-1 25470 10 YR7500.00 470.00 483.17 475.61 483.51 0.000840 4.69 1645.63 165.360.25Reach-1 25470 50 YR10500.00 470.00 485.18 476.95 485.64 0.000940 5.53 1966.09 171.910.27Reach-1 25470 100 YR11800.00 470.00 485.98 477.46 486.50 0.000971 5.85 2094.39 174.530.27Reach-1 25470 500 YR15100.00 470.00 487.58 478.72 488.26 0.001099 6.69 2351.44 179.770.30Reach-1 25470 100 YR FD 16100.00 470.00 488.29 479.07 489.00 0.001074 6.81 2465.09 182.090.30Reach-1 25370 10 YR7500.00 472.00 482.23483.17 0.003898 7.78 964.24 127.280.50Reach-1 25370 50 YR10500.00 472.00 484.11485.27 0.004053 8.64 1215.45 140.790.52Reach-1 25370 100 YR11800.00 472.00 484.89486.11 0.003979 8.89 1326.74 144.900.52Reach-1 25370 500 YR15100.00 472.00 486.34487.83 0.004241 9.78 1543.77 152.970.54Reach-1 25370 100 YR FD 16100.00 472.00 487.15488.59 0.003895 9.65 1668.43 158.100.52Reach-1 25133 10 YR7500.00 466.95 481.30481.89 0.002158 6.26 1300.89 200.220.36Reach-1 25133 50 YR10500.00 466.95 483.19483.93 0.002208 7.08 1718.73 250.610.37Reach-1 25133 100 YR11800.00 466.95 484.04484.81 0.002105 7.26 1938.10 263.040.37Reach-1 25133 500 YR15100.00 466.95 485.52486.43 0.002199 8.01 2343.54 285.290.38Reach-1 25133 100 YR FD 16100.00 466.95 486.47487.32 0.001915 7.82 2622.16 300.500.36Reach-1 25113 10 YR7500.00 466.46 480.57481.77 0.005219 8.94 963.19 193.680.56Reach-1 25113 50 YR10500.00 466.46 482.54483.81 0.004424 9.46 1376.18 227.750.53Reach-1 25113 100 YR11800.00 466.46 483.46484.70 0.003932 9.47 1595.32 252.650.51Reach-1 25113 500 YR15100.00 466.46 484.94486.32 0.003816 10.17 1996.09 283.630.51Reach-1 25113 100 YR FD 16100.00 466.46 486.02487.23 0.003071 9.66 2311.04 300.490.47Reach-1 25080 10 YR7500.00 465.98 480.63481.53 0.003199 7.81 1138.82 197.260.45Reach-1 25080 50 YR10500.00 465.98 482.58483.60 0.003023 8.54 1536.22 217.340.45 HEC-RAS Plan: EFF River: RIVER-1 Reach: Reach-1 (Continued)Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) Reach-1 25080 100 YR11800.00 465.98 483.48484.52 0.002811 8.68 1739.78 234.600.44Reach-1 25080 500 YR15100.00 465.98 484.93486.15 0.002924 9.55 2107.97 271.870.46Reach-1 25080 100 YR FD 16100.00 465.98 486.00487.10 0.002442 9.18 2411.81 297.400.42Reach-1 25040 10 YR7500.00 464.91 480.51481.04 0.001371 5.88 1286.69 132.250.31Reach-1 25040 50 YR10500.00 464.91 482.35483.12 0.001597 7.03 1551.83 166.270.34Reach-1 25040 100 YR11800.00 464.91 483.22484.06 0.001610 7.37 1705.66 188.520.35Reach-1 25040 500 YR15100.00 464.91 484.57485.66 0.001892 8.49 1976.75 215.820.38Reach-1 25040 100 YR FD 16100.00 464.91 485.64486.69 0.001676 8.36 2221.59 240.140.36Reach-1 25000 10 YR7500.00 464.00 480.46480.80 0.000876 4.69 1602.89 165.590.25Reach-1 25000 50 YR10500.00 464.00 482.34482.82 0.001028 5.55 1991.44 237.780.28Reach-1 25000 100 YR11800.00 464.00 483.23483.74 0.001040 5.77 2207.25 246.770.28Reach-1 25000 500 YR15100.00 464.00 484.62485.27 0.001242 6.58 2564.21 276.290.31Reach-1 25000 100 YR FD 16100.00 464.00 485.72486.33 0.001121 6.42 2888.87 314.900.30Reach-1 24000 10 YR7500.00 466.00 480.00 472.65 480.42 0.001053 5.22 1535.26 180.600.28Reach-1 24000 50 YR10500.00 466.00 481.80 474.17 482.37 0.001204 6.17 1946.72 276.580.30Reach-1 24000 100 YR11800.00 466.00 482.70 474.77 483.30 0.001175 6.37 2205.91 292.190.30Reach-1 24000 500 YR15100.00 466.00 484.00 476.14 484.76 0.001351 7.25 2591.73 301.390.33Reach-1 24000 100 YR FD 16100.00 466.00 485.20 476.55 485.89 0.001133 6.99 2958.66 310.160.30 140016001800200022002400260028003000480485490495500505510515Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 30130 Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR4 ft/s5 ft/s6 ft/s7 ft/s8 ft/s9 ft/s10 ft/sGroundBank Sta.065.045.065 10001050110011501200125013001350480485490495500505Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 27900 Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank Sta.065.045.065 10001100120013001400150016001700475480485490495500505510Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 27620 Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR4 ft/s6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/sGroundBank Sta.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 27570 This is a REPEATED section.Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR4 ft/s6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/sGroundIneffBank Sta.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 27555 BR Bridge #6Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/sGroundIneffBank Sta.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 27555 BR Bridge #6Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/sGroundIneffBank Sta.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 27540 Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/sGroundIneffBank Sta.065.045.07 1000110012001300140015001600475480485490495500Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 27400 PROFILE SECTION R - SURVEY SECTION 17AStation (ft)Elevation (ft)LegendWS 50 YRWS 10 YR3.0 ft/s3.5 ft/s4.0 ft/s4.5 ft/s5.0 ft/sGroundBank Sta.065.045.07 1000110012001300140015001600470475480485490495500505Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 27050 27050Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank Sta.07.045.075 1000110012001300140015001600470475480485490495500505Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 26880 PROFILE SECTION Q - SURVEY SECTION 17Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/sGroundBank Sta.07.045.075 10001100120013001400150016001700470475480485490495500505510Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 26700 Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/sGroundBank Sta.08.045.08 10001100120013001400150016001700470475480485490495500505510Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 26300 Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/sGroundBank Sta.08.045.08 10001100120013001400150016001700470475480485490495500Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 26170 26170Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/sGroundBank Sta.08.045.08 10001200140016001800470475480485490495500Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 25820 25820Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR1.0 ft/s1.5 ft/s2.0 ft/s2.5 ft/s3.0 ft/s3.5 ft/s4.0 ft/s4.5 ft/sGroundBank Sta.08.045.08 1000110012001300140015001600470475480485490495500Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 25725 25725Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank Sta.08.045.08 100011001200130014001500470475480485490495500Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 25685 25685Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/s14 ft/sGroundBank Sta.08.045.08 10001100120013001400470475480485490495Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 25550 25635Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank Sta.08.045.08 1000105011001150120012501300470475480485490495500Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 25500 This is a REPEATED section.Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/sGroundIneffBank Sta.08.045.08 1000105011001150120012501300470475480485490495500Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 25485 BR Bridge #5Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/sGroundIneffBank Sta.08.045.08 1000105011001150120012501300470475480485490495500Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 25485 BR Bridge #5Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/sGroundIneffBank Sta.08.045.08 1000105011001150120012501300470475480485490495500Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 25470 Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/sGroundIneffBank Sta.08.045.08 10001100120013001400150016001700470475480485490495500Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 25370 Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/s14 ft/sGroundBank Sta.08.045.08 0100200300400500465470475480485490495Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 25133 Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/sGroundBank Sta.04.08.045.08.04 0100200300400500600465470475480485490495Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 25113 Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/sGroundBank Sta.04.08.045.08.04 0100200300400500600465470475480485490495Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 25080 Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/s8 ft/sGroundBank Sta.04.08.045.08.04 0100200300400500600460465470475480485490495Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 25040 Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR0 ft/s1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/sGroundBank Sta.04.08.045.045.08.04 10001200140016001800460465470475480485490495Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 25000 Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR0 ft/s1 ft/s2 ft/s3 ft/s4 ft/s5 ft/sGroundBank Sta.08.045.08 10001100120013001400150016001700465470475480485490495Effective 10/13/2020 River = RIVER-1 Reach = Reach-1 RS = 24000 Station (ft)Elevation (ft)LegendWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/sGroundBank Sta.08.045.08 01000200030004000500060007000460470480490500510Effective 10/12/2020 Main Channel Distance (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YRGround B. Corrected Effected HEC-RAS 4.1.0 Output HEC-RAS Plan: CorrEff River: RIVER-1 Reach: Reach-1Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)Reach-1 30130 10 YR6700.00 483.70 499.48500.59 0.004494 9.77 963.45 146.480.51Reach-1 30130 50 YR9400.00 483.70 501.84503.10 0.004545 10.76 1368.02 225.170.52Reach-1 30130 100 YR10500.00 483.70 502.60503.84 0.004315 10.86 1551.33 264.510.51Reach-1 30130 500 YR13400.00 483.70 504.28505.47 0.003871 11.08 2074.36 356.660.49Reach-1 30130 100 YR FD 14450.00 483.70 504.78505.96 0.003782 11.18 2261.42 386.410.49Reach-1 27900 10 YR6700.00 480.00 493.51494.25 0.002494 6.94 965.13 104.390.40Reach-1 27900 50 YR9400.00 480.00 495.85496.76 0.002506 7.68 1228.33 120.020.41Reach-1 27900 100 YR10500.00 480.00 496.60497.59 0.002579 8.00 1323.60 134.150.42Reach-1 27900 500 YR13400.00 480.00 498.35499.52 0.002697 8.72 1592.99 180.170.44Reach-1 27900 100 YR FD 14450.00 480.00 498.98500.20 0.002620 8.89 1716.08 208.140.44Reach-1 27620 10 YR6700.00 476.00 491.03492.42 0.005425 9.45 709.13 82.500.57Reach-1 27620 50 YR9400.00 476.00 493.43494.98 0.005061 10.04 1003.44 201.350.56Reach-1 27620 100 YR10500.00 476.00 494.46495.91 0.004375 9.86 1249.10 270.150.53Reach-1 27620 500 YR13400.00 476.00 497.19498.16 0.002740 8.57 2158.65 361.970.43Reach-1 27620 100 YR FD 14450.00 476.00 498.07498.90 0.002380 8.13 2477.65 367.100.40Reach-1 27570 10 YR6700.00 475.20 490.46 486.89 492.05 0.006220 10.12 662.04 89.560.62Reach-1 27570 50 YR9400.00 475.20 492.66 489.42 494.61 0.005605 11.22 838.01 265.700.61Reach-1 27570 100 YR10500.00 475.20 493.44 490.24 495.55 0.005499 11.66 900.67 350.670.61Reach-1 27570 500 YR13400.00 475.20 495.20 491.72 497.77 0.005526 12.87 1041.09 526.590.63Reach-1 27570 100 YR FD 14450.00 475.20 495.74 492.24 498.50 0.005611 13.33 1084.32 578.940.64Reach-1 27555 BridgeReach-1 27540 10 YR6700.00 475.00 489.29 486.84 491.17 0.008571 11.01 608.56 81.030.71Reach-1 27540 50 YR9400.00 475.00 491.49 489.25 493.63 0.007670 11.72 802.31 149.780.69Reach-1 27540 100 YR10500.00 475.00 492.27 490.02 494.52 0.007251 12.04 871.97 228.400.68Reach-1 27540 500 YR13400.00 475.00 493.81 491.42 496.54 0.007224 13.26 1010.48 390.680.70Reach-1 27540 100 YR FD 14450.00 475.00 494.15 491.87 497.14 0.007596 13.87 1041.48 425.440.72Reach-1 27400 10 YR6700.00 476.00 489.72490.01 0.001247 4.90 1662.52 193.540.29Reach-1 27400 50 YR9400.00 476.00 491.99492.35 0.001399 5.66 2167.09 255.390.31Reach-1 27400 100 YR10500.00 476.00 492.83493.21 0.001371 5.90 2393.45 288.350.31Reach-1 27400 500 YR13400.00 476.00 494.58495.03 0.001356 6.48 2970.37 397.430.32Reach-1 27400 100 YR FD 14450.00 476.00 495.02495.50 0.001391 6.71 3158.79 444.900.33Reach-1 27050 10 YR6700.00 474.00 487.67489.17 0.004599 10.01 768.79 121.690.54Reach-1 27050 50 YR9400.00 474.00 489.54491.40 0.005109 11.41 1021.73 151.960.58Reach-1 27050 100 YR10500.00 474.00 490.20 487.34 492.25 0.005363 11.99 1129.18 184.700.59Reach-1 27050 500 YR13400.00 474.00 491.68 489.15 494.03 0.005788 13.13 1515.40 322.550.62 HEC-RAS Plan: CorrEff River: RIVER-1 Reach: Reach-1 (Continued)Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) Reach-1 27050 100 YR FD 14450.00 474.00 491.80 489.46 494.44 0.006486 13.95 1553.66 330.720.66Reach-1 26880 10 YR7600.00 474.00 487.40488.51 0.003367 8.46 900.14 99.900.47Reach-1 26880 50 YR10600.00 474.00 489.18490.70 0.003856 9.93 1120.49 150.800.52Reach-1 26880 100 YR11900.00 474.00 489.82491.51 0.004053 10.49 1226.00 176.420.53Reach-1 26880 500 YR15100.00 474.00 491.21 486.94 493.26 0.004457 11.68 1533.44 271.590.56Reach-1 26880 100 YR FD 15500.00 474.00 491.54 487.11 493.55 0.004287 11.61 1626.50 295.430.56Reach-1 26700 10 YR7600.00 474.00 485.35487.25 0.009905 11.07 686.83 107.390.77Reach-1 26700 50 YR10600.00 474.00 487.46489.43 0.008621 11.28 942.56 141.950.74Reach-1 26700 100 YR11900.00 474.00 488.26490.26 0.008014 11.36 1067.78 169.090.72Reach-1 26700 500 YR15100.00 474.00 490.03492.04 0.007007 11.46 1431.88 256.560.69Reach-1 26700 100 YR FD 15500.00 474.00 490.53492.37 0.006285 11.03 1565.79 281.000.65Reach-1 26300 10 YR7600.00 470.00 484.67485.41 0.002364 6.94 1157.74 163.470.40Reach-1 26300 50 YR10600.00 470.00 486.75487.63 0.002485 7.67 1527.15 193.130.42Reach-1 26300 100 YR11900.00 470.00 487.57488.50 0.002497 7.90 1691.56 208.080.42Reach-1 26300 500 YR15100.00 470.00 489.27490.35 0.002603 8.54 2139.03 332.800.44Reach-1 26300 100 YR FD 15500.00 470.00 489.87490.85 0.002330 8.24 2345.18 364.440.42Reach-1 26170 10 YR7600.00 472.00 484.35485.05 0.002364 6.83 1258.42 213.380.40Reach-1 26170 50 YR10600.00 472.00 486.49487.27 0.002163 7.34 1734.22 232.270.39Reach-1 26170 100 YR11900.00 472.00 487.33488.13 0.002093 7.52 1932.62 241.290.39Reach-1 26170 500 YR15100.00 472.00 489.02489.97 0.002158 8.23 2391.39 326.670.40Reach-1 26170 100 YR FD 15500.00 472.00 489.63490.52 0.001924 7.97 2601.43 356.160.38Reach-1 25820 10 YR7600.00 470.00 484.23484.47 0.000811 4.11 2188.59 305.910.24Reach-1 25820 50 YR10600.00 470.00 486.42486.69 0.000797 4.43 2898.96 344.740.24Reach-1 25820 100 YR11900.00 470.00 487.28487.56 0.000792 4.55 3204.11 367.330.24Reach-1 25820 500 YR15100.00 470.00 489.04489.36 0.000796 4.87 3897.34 418.460.25Reach-1 25820 100 YR FD 15500.00 470.00 489.67489.97 0.000718 4.73 4165.81 442.620.23Reach-1 25725 10 YR7600.00 472.00 483.47484.21 0.002868 6.88 1104.59 140.880.43Reach-1 25725 50 YR10600.00 472.00 485.56486.43 0.002750 7.48 1441.59 190.750.44Reach-1 25725 100 YR11900.00 472.00 486.40487.30 0.002615 7.66 1611.96 217.590.43Reach-1 25725 500 YR15100.00 472.00 488.08489.10 0.002421 8.18 2024.12 275.660.42Reach-1 25725 100 YR FD 15500.00 472.00 488.80489.73 0.002052 7.85 2241.11 323.750.39Reach-1 25685 10 YR7600.00 470.00 483.17484.07 0.003332 7.61 998.31 121.560.47Reach-1 25685 50 YR10600.00 470.00 485.18486.28 0.003687 8.41 1261.09 142.950.50Reach-1 25685 100 YR11900.00 470.00 486.00487.15 0.003769 8.60 1383.02 154.140.51Reach-1 25685 500 YR15100.00 470.00 487.65488.95 0.003438 9.19 1695.89 228.620.50 HEC-RAS Plan: CorrEff River: RIVER-1 Reach: Reach-1 (Continued)Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) Reach-1 25685 100 YR FD 15500.00 470.00 488.44489.61 0.002814 8.73 1892.15 263.380.46Reach-1 25550 10 YR7500.00 470.00 483.12483.87 0.002645 6.96 1077.60 125.940.42Reach-1 25550 50 YR10500.00 470.00 485.12486.07 0.002958 7.80 1345.92 144.070.45Reach-1 25550 100 YR11800.00 470.00 485.93486.94 0.003032 8.05 1466.26 152.630.46Reach-1 25550 500 YR15100.00 470.00 487.57488.76 0.003037 8.75 1761.52 208.690.47Reach-1 25550 100 YR FD 16100.00 470.00 488.30489.47 0.002787 8.71 1923.06 231.580.45Reach-1 25500 10 YR7500.00 470.00 483.35 475.61 483.68 0.000795 4.61 1674.54 165.950.24Reach-1 25500 50 YR10500.00 470.00 485.39 476.95 485.84 0.000889 5.44 2000.76 172.610.26Reach-1 25500 100 YR11800.00 470.00 486.21 477.46 486.71 0.000919 5.75 2131.11 175.270.27Reach-1 25500 500 YR15100.00 470.00 487.86 478.72 488.51 0.001036 6.57 2395.32 180.670.29Reach-1 25500 100 YR FD 16100.00 470.00 488.57 479.07 489.25 0.001015 6.69 2508.60 182.980.29Reach-1 25485 BridgeReach-1 25470 10 YR7500.00 470.00 483.17 475.61 483.51 0.000840 4.69 1645.63 165.360.25Reach-1 25470 50 YR10500.00 470.00 485.18 476.95 485.64 0.000940 5.53 1966.09 171.910.27Reach-1 25470 100 YR11800.00 470.00 485.98 477.46 486.50 0.000971 5.85 2094.39 174.530.27Reach-1 25470 500 YR15100.00 470.00 487.58 478.72 488.26 0.001099 6.69 2351.44 179.770.30Reach-1 25470 100 YR FD 16100.00 470.00 488.29 479.07 489.00 0.001074 6.81 2465.09 182.090.30Reach-1 25370 10 YR7500.00 472.00 482.23483.17 0.003898 7.78 964.24 127.280.50Reach-1 25370 50 YR10500.00 472.00 484.11485.27 0.004053 8.64 1215.45 140.790.52Reach-1 25370 100 YR11800.00 472.00 484.89486.11 0.003979 8.89 1326.74 144.900.52Reach-1 25370 500 YR15100.00 472.00 486.34487.83 0.004241 9.78 1543.77 152.970.54Reach-1 25370 100 YR FD 16100.00 472.00 487.15488.59 0.003895 9.65 1668.43 158.100.52Reach-1 25133 10 YR7500.00 466.95 481.30481.89 0.002158 6.26 1300.89 200.220.36Reach-1 25133 50 YR10500.00 466.95 483.19483.93 0.002208 7.08 1718.73 250.610.37Reach-1 25133 100 YR11800.00 466.95 484.04484.81 0.002105 7.26 1938.10 263.040.37Reach-1 25133 500 YR15100.00 466.95 485.52486.43 0.002199 8.01 2343.54 285.290.38Reach-1 25133 100 YR FD 16100.00 466.95 486.47487.32 0.001915 7.82 2622.16 300.500.36Reach-1 25113 10 YR7500.00 466.46 480.57481.77 0.005219 8.94 963.19 193.680.56Reach-1 25113 50 YR10500.00 466.46 482.54483.81 0.004424 9.46 1376.18 227.750.53Reach-1 25113 100 YR11800.00 466.46 483.46484.70 0.003932 9.47 1595.32 252.650.51Reach-1 25113 500 YR15100.00 466.46 484.94486.32 0.003816 10.17 1996.09 283.630.51Reach-1 25113 100 YR FD 16100.00 466.46 486.02487.23 0.003071 9.66 2311.04 300.490.47Reach-1 25080 10 YR7500.00 465.98 480.63481.53 0.003199 7.81 1138.82 197.260.45Reach-1 25080 50 YR10500.00 465.98 482.58483.60 0.003023 8.54 1536.22 217.340.45 HEC-RAS Plan: CorrEff River: RIVER-1 Reach: Reach-1 (Continued)Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) Reach-1 25080 100 YR11800.00 465.98 483.48484.52 0.002811 8.68 1739.78 234.600.44Reach-1 25080 500 YR15100.00 465.98 484.93486.15 0.002924 9.55 2107.97 271.870.46Reach-1 25080 100 YR FD 16100.00 465.98 486.00487.10 0.002442 9.18 2411.81 297.400.42Reach-1 25040 10 YR7500.00 464.91 480.51481.04 0.001371 5.88 1286.69 132.250.31Reach-1 25040 50 YR10500.00 464.91 482.35483.12 0.001597 7.03 1551.83 166.270.34Reach-1 25040 100 YR11800.00 464.91 483.22484.06 0.001610 7.37 1705.66 188.520.35Reach-1 25040 500 YR15100.00 464.91 484.57485.66 0.001892 8.49 1976.75 215.820.38Reach-1 25040 100 YR FD 16100.00 464.91 485.64486.69 0.001676 8.36 2221.59 240.140.36Reach-1 25000 10 YR7500.00 464.00 480.46480.80 0.000876 4.69 1602.89 165.590.25Reach-1 25000 50 YR10500.00 464.00 482.34482.82 0.001028 5.55 1991.44 237.780.28Reach-1 25000 100 YR11800.00 464.00 483.23483.74 0.001040 5.77 2207.25 246.770.28Reach-1 25000 500 YR15100.00 464.00 484.62485.27 0.001242 6.58 2564.21 276.290.31Reach-1 25000 100 YR FD 16100.00 464.00 485.72486.33 0.001121 6.42 2888.87 314.900.30Reach-1 24000 10 YR7500.00 466.00 480.00 472.65 480.42 0.001053 5.22 1535.26 180.600.28Reach-1 24000 50 YR10500.00 466.00 481.80 474.17 482.37 0.001204 6.17 1946.72 276.580.30Reach-1 24000 100 YR11800.00 466.00 482.70 474.77 483.30 0.001175 6.37 2205.91 292.190.30Reach-1 24000 500 YR15100.00 466.00 484.00 476.14 484.76 0.001351 7.25 2591.73 301.390.33Reach-1 24000 100 YR FD 16100.00 466.00 485.20 476.55 485.89 0.001133 6.99 2958.66 310.160.30 140016001800200022002400260028003000480485490495500505510515Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 30130 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR4 ft/s5 ft/s6 ft/s7 ft/s8 ft/s9 ft/s10 ft/sGroundBank Sta.065.045.065 10001050110011501200125013001350480485490495500505Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27900 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank Sta.065.045.065 10001100120013001400150016001700475480485490495500505510Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27620 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR4 ft/s6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/sGroundBank Sta.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27570 This is a REPEATED section.Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR4 ft/s6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/sGroundIneffBank Sta.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27555 BR Bridge #6Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/sGroundIneffBank Sta.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27555 BR Bridge #6Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/sGroundIneffBank Sta.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27540 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/sGroundIneffBank Sta.065.045.07 1000110012001300140015001600475480485490495500Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27400 PROFILE SECTION R - SURVEY SECTION 17AStation (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR3.0 ft/s3.5 ft/s4.0 ft/s4.5 ft/s5.0 ft/sGroundBank Sta.065.045.07 1000110012001300140015001600470475480485490495500505Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27050 27050Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank Sta.07.045.075 1000110012001300140015001600470475480485490495500505Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 26880 PROFILE SECTION Q - SURVEY SECTION 17Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/sGroundBank Sta.07.045.075 10001100120013001400150016001700470475480485490495500505510Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 26700 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/sGroundBank Sta.08.045.08 10001100120013001400150016001700470475480485490495500505510Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 26300 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/sGroundBank Sta.08.045.08 10001100120013001400150016001700470475480485490495500Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 26170 26170Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/sGroundBank Sta.08.045.08 10001200140016001800470475480485490495500Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25820 25820Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR1.0 ft/s1.5 ft/s2.0 ft/s2.5 ft/s3.0 ft/s3.5 ft/s4.0 ft/s4.5 ft/sGroundBank Sta.08.045.08 1000110012001300140015001600470475480485490495500Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25725 25725Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank Sta.08.045.08 100011001200130014001500470475480485490495500Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25685 25685Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/s14 ft/sGroundBank Sta.08.045.08 10001100120013001400470475480485490495Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25550 25635Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank Sta.08.045.08 1000105011001150120012501300470475480485490495500Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25500 This is a REPEATED section.Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/sGroundIneffBank Sta.08.045.08 1000105011001150120012501300470475480485490495500Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25485 BR Bridge #5Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/sGroundIneffBank Sta.08.045.08 1000105011001150120012501300470475480485490495500Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25485 BR Bridge #5Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/sGroundIneffBank Sta.08.045.08 1000105011001150120012501300470475480485490495500Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25470 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/sGroundIneffBank Sta.08.045.08 10001100120013001400150016001700470475480485490495500Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25370 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/s14 ft/sGroundBank Sta.08.045.08 0100200300400500465470475480485490495Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25133 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/sGroundBank Sta.04.08.045.08.04 0100200300400500600465470475480485490495Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25113 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/sGroundBank Sta.04.08.045.08.04 0100200300400500600465470475480485490495Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25080 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/s8 ft/sGroundBank Sta.04.08.045.08.04 0100200300400500600460465470475480485490495Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25040 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR0 ft/s1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/sGroundBank Sta.04.08.045.045.08.04 10001200140016001800460465470475480485490495Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25000 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR0 ft/s1 ft/s2 ft/s3 ft/s4 ft/s5 ft/sGroundBank Sta.08.045.08 10001100120013001400150016001700465470475480485490495Corrected Effective 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 24000 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/sGroundBank Sta.08.045.08 01000200030004000500060007000460470480490500510Corrected Effective 4/20/2021 Main Channel Distance (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YRGround C. Revised HEC-RAS 4.1.0 Output HEC-RAS Plan: Rev River: RIVER-1 Reach: Reach-1Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) Reach-1 30130 10 YR6700.00 483.70 499.48500.59 0.004494 9.77 963.45 146.480.51Reach-1 30130 50 YR9400.00 483.70 501.84503.10 0.004545 10.76 1368.02 225.170.52Reach-1 30130 100 YR10500.00 483.70 502.60503.84 0.004315 10.86 1551.33 264.510.51Reach-1 30130 500 YR13400.00 483.70 504.28505.47 0.003871 11.08 2074.36 356.660.49Reach-1 30130 100 YR FD 14450.00 483.70 504.78505.96 0.003782 11.18 2261.42 386.410.49Reach-1 27900 10 YR6700.00 480.00 493.51494.25 0.002494 6.94 965.13 104.390.40Reach-1 27900 50 YR9400.00 480.00 495.85496.76 0.002506 7.68 1228.33 120.020.41Reach-1 27900 100 YR10500.00 480.00 496.60497.59 0.002579 8.00 1323.60 134.150.42Reach-1 27900 500 YR13400.00 480.00 498.35499.52 0.002697 8.72 1592.99 180.170.44Reach-1 27900 100 YR FD 14450.00 480.00 498.98500.20 0.002620 8.89 1716.08 208.140.44Reach-1 27620 10 YR6700.00 476.00 491.03492.42 0.005425 9.45 709.13 82.500.57Reach-1 27620 50 YR9400.00 476.00 493.43494.98 0.005061 10.04 1003.44 201.350.56Reach-1 27620 100 YR10500.00 476.00 494.46495.91 0.004375 9.86 1249.10 270.150.53Reach-1 27620 500 YR13400.00 476.00 497.19498.16 0.002740 8.57 2158.67 361.970.43Reach-1 27620 100 YR FD 14450.00 476.00 498.07498.90 0.002380 8.13 2477.65 367.100.40Reach-1 27570 10 YR6700.00 475.20 490.46 486.89 492.05 0.006220 10.12 662.04 89.560.62Reach-1 27570 50 YR9400.00 475.20 492.66 489.42 494.61 0.005605 11.22 838.01 265.700.61Reach-1 27570 100 YR10500.00 475.20 493.44 490.24 495.55 0.005499 11.66 900.67 350.670.61Reach-1 27570 500 YR13400.00 475.20 495.20 491.72 497.77 0.005526 12.87 1041.09 526.590.63Reach-1 27570 100 YR FD 14450.00 475.20 495.74 492.24 498.50 0.005611 13.33 1084.32 578.940.64Reach-1 27555 BridgeReach-1 27540 10 YR6700.00 475.00 489.29 486.84 491.17 0.008571 11.01 608.56 81.030.71Reach-1 27540 50 YR9400.00 475.00 491.49 489.25 493.63 0.007670 11.72 802.31 149.780.69Reach-1 27540 100 YR10500.00 475.00 492.27 490.02 494.52 0.007251 12.04 871.97 228.400.68Reach-1 27540 500 YR13400.00 475.00 493.81 491.42 496.54 0.007224 13.26 1010.49 390.700.70Reach-1 27540 100 YR FD 14450.00 475.00 494.15 491.87 497.14 0.007595 13.87 1041.50 425.460.72Reach-1 27400 10 YR6700.00 476.00 489.72490.01 0.001247 4.90 1662.52 193.540.29Reach-1 27400 50 YR9400.00 476.00 491.99492.35 0.001399 5.66 2167.09 255.390.31Reach-1 27400 100 YR10500.00 476.00 492.83493.21 0.001371 5.90 2393.45 288.350.31Reach-1 27400 500 YR13400.00 476.00 494.58495.03 0.001356 6.48 2970.43 397.450.32Reach-1 27400 100 YR FD 14450.00 476.00 495.02495.50 0.001391 6.71 3158.85 444.900.33Reach-1 27050 10 YR6700.00 474.00 487.67489.17 0.004599 10.01 768.79 121.690.54Reach-1 27050 50 YR9400.00 474.00 489.54491.40 0.005109 11.41 1021.73 151.960.58Reach-1 27050 100 YR10500.00 474.00 490.20 487.34 492.25 0.005363 11.99 1129.18 184.700.59Reach-1 27050 500 YR13400.00 474.00 491.68 489.15 494.03 0.005786 13.12 1515.80 322.640.62 HEC-RAS Plan: Rev River: RIVER-1 Reach: Reach-1 (Continued)Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) Reach-1 27050 100 YR FD 14450.00 474.00 491.80 489.46 494.44 0.006478 13.94 1555.01 331.000.66Reach-1 26880 10 YR7600.00 474.00 487.40488.51 0.003367 8.46 900.14 99.900.47Reach-1 26880 50 YR10600.00 474.00 489.18490.70 0.003856 9.93 1120.49 150.800.52Reach-1 26880 100 YR11900.00 474.00 489.82491.51 0.004053 10.49 1226.00 176.420.53Reach-1 26880 500 YR15100.00 474.00 491.21 486.94 493.26 0.004456 11.68 1533.80 271.690.56Reach-1 26880 100 YR FD 15500.00 474.00 491.54 487.11 493.55 0.004283 11.61 1627.63 295.710.56Reach-1 26700 10 YR7600.00 474.00 485.35487.25 0.009905 11.07 686.83 107.390.77Reach-1 26700 50 YR10600.00 474.00 487.46489.43 0.008621 11.28 942.56 141.950.74Reach-1 26700 100 YR11900.00 474.00 488.26490.26 0.008014 11.36 1067.78 169.090.72Reach-1 26700 500 YR15100.00 474.00 490.03492.04 0.007001 11.46 1432.56 256.690.68Reach-1 26700 100 YR FD 15500.00 474.00 490.53492.37 0.006271 11.02 1567.74 281.340.65Reach-1 26300 10 YR7600.00 470.00 484.67485.41 0.002364 6.94 1157.74 163.470.40Reach-1 26300 50 YR10600.00 470.00 486.75487.63 0.002485 7.67 1527.15 193.130.42Reach-1 26300 100 YR11900.00 470.00 487.57488.50 0.002497 7.90 1691.56 208.080.42Reach-1 26300 500 YR15100.00 470.00 489.28490.35 0.002601 8.54 2140.20 332.980.44Reach-1 26300 100 YR FD 15500.00 470.00 489.87490.86 0.002324 8.23 2348.41 364.910.41Reach-1 26170 10 YR7600.00 472.00 484.35485.05 0.002364 6.83 1258.42 213.380.40Reach-1 26170 50 YR10600.00 472.00 486.49487.27 0.002163 7.34 1734.22 232.270.39Reach-1 26170 100 YR11900.00 472.00 487.33488.13 0.002093 7.52 1932.62 241.290.39Reach-1 26170 500 YR15100.00 472.00 489.02489.97 0.002156 8.23 2392.61 326.850.40Reach-1 26170 100 YR FD 15500.00 472.00 489.64490.52 0.001919 7.96 2604.77 356.610.38Reach-1 25820 10 YR7600.00 470.00 484.23484.47 0.000811 4.11 2188.59 305.910.24Reach-1 25820 50 YR10600.00 470.00 486.42486.69 0.000797 4.43 2898.96 344.740.24Reach-1 25820 100 YR11900.00 470.00 487.28487.56 0.000792 4.55 3204.11 367.330.24Reach-1 25820 500 YR15100.00 470.00 489.05489.37 0.000795 4.87 3898.93 418.610.25Reach-1 25820 100 YR FD 15500.00 470.00 489.68489.98 0.000716 4.73 4169.99 442.980.23Reach-1 25725 10 YR7600.00 472.00 483.47484.21 0.002868 6.88 1104.59 140.880.43Reach-1 25725 50 YR10600.00 472.00 485.56486.43 0.002750 7.48 1441.59 190.750.44Reach-1 25725 100 YR11900.00 472.00 486.40487.30 0.002615 7.66 1611.95 217.590.43Reach-1 25725 500 YR15100.00 472.00 488.08489.10 0.002418 8.18 2025.47 275.980.42Reach-1 25725 100 YR FD 15500.00 472.00 488.81489.74 0.002045 7.84 2244.94 324.540.39Reach-1 25685 10 YR7600.00 470.00 483.17484.07 0.003332 7.61 998.31 121.560.47Reach-1 25685 50 YR10600.00 470.00 485.18486.28 0.003687 8.41 1261.09 142.950.50Reach-1 25685 100 YR11900.00 470.00 486.00487.15 0.003769 8.60 1383.01 154.140.51Reach-1 25685 500 YR15100.00 470.00 487.65488.96 0.003432 9.19 1697.19 228.900.50 HEC-RAS Plan: Rev River: RIVER-1 Reach: Reach-1 (Continued)Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) Reach-1 25685 100 YR FD 15500.00 470.00 488.46489.62 0.002803 8.72 1895.63 263.900.45Reach-1 25550 10 YR7500.00 470.00 483.12483.87 0.002645 6.96 1077.60 125.940.42Reach-1 25550 50 YR10500.00 470.00 485.12486.07 0.002958 7.80 1345.92 144.070.45Reach-1 25550 100 YR11800.00 470.00 485.93486.94 0.003032 8.05 1466.25 152.630.46Reach-1 25550 500 YR15100.00 470.00 487.58488.76 0.003032 8.75 1762.74 208.890.47Reach-1 25550 100 YR FD 16100.00 470.00 488.32489.48 0.002775 8.70 1926.23 231.970.45Reach-1 25500 10 YR7500.00 470.00 483.35 475.61 483.68 0.000795 4.61 1674.54 165.950.24Reach-1 25500 50 YR10500.00 470.00 485.39 476.95 485.84 0.000889 5.44 2000.76 172.610.26Reach-1 25500 100 YR11800.00 470.00 486.21 477.46 486.71 0.000919 5.75 2131.11 175.270.27Reach-1 25500 500 YR15100.00 470.00 487.86 478.72 488.52 0.001034 6.56 2396.17 180.690.29Reach-1 25500 100 YR FD 16100.00 470.00 488.58 479.07 489.26 0.001012 6.69 2510.60 183.020.29Reach-1 25485 BridgeReach-1 25470 10 YR7500.00 470.00 483.17 475.61 483.51 0.000840 4.69 1645.63 165.360.25Reach-1 25470 50 YR10500.00 470.00 485.18 476.95 485.64 0.000940 5.53 1966.09 171.910.27Reach-1 25470 100 YR11800.00 470.00 485.98 477.46 486.50 0.000971 5.85 2094.39 174.530.27Reach-1 25470 500 YR15100.00 470.00 487.59 478.72 488.27 0.001098 6.68 2352.34 179.790.30Reach-1 25470 100 YR FD 16100.00 470.00 488.31 479.07 489.01 0.001071 6.80 2467.22 182.140.30Reach-1 25370 10 YR7500.00 472.00 482.23483.17 0.003898 7.78 964.24 127.280.50Reach-1 25370 50 YR10500.00 472.00 484.11485.27 0.004053 8.64 1215.45 140.790.52Reach-1 25370 100 YR11800.00 472.00 484.89486.11 0.003979 8.89 1326.73 144.900.52Reach-1 25370 500 YR15100.00 472.00 486.35487.84 0.004232 9.77 1545.08 153.020.54Reach-1 25370 100 YR FD 16100.00 472.00 487.17488.61 0.003875 9.63 1671.46 158.220.52Reach-1 25133 10 YR7500.00 466.95 481.30481.89 0.002158 6.26 1300.89 200.220.36Reach-1 25133 50 YR10500.00 466.95 483.19483.93 0.002208 7.08 1718.73 250.610.37Reach-1 25133 100 YR11800.00 466.95 484.04484.81 0.002105 7.26 1935.73 256.400.37Reach-1 25133 500 YR15100.00 466.95 485.53486.44 0.002199 8.01 2323.12 264.990.38Reach-1 25133 100 YR FD 16100.00 466.95 486.48487.34 0.001919 7.83 2579.69 271.180.36Reach-1 25113 10 YR7500.00 466.46 480.57481.77 0.005219 8.94 963.19 193.680.56Reach-1 25113 50 YR10500.00 466.46 482.54483.81 0.004424 9.46 1376.18 227.750.53Reach-1 25113 100 YR11800.00 466.46 483.46484.70 0.003932 9.47 1591.78 240.570.51Reach-1 25113 500 YR15100.00 466.46 484.93486.33 0.003854 10.22 1953.74 250.400.52Reach-1 25113 100 YR FD 16100.00 466.46 486.00487.25 0.003141 9.76 2225.60 258.990.47Reach-1 25080 10 YR7500.00 465.98 480.63481.53 0.003199 7.81 1138.82 197.260.45Reach-1 25080 50 YR10500.00 465.98 482.58483.60 0.003023 8.54 1536.22 217.340.45 HEC-RAS Plan: Rev River: RIVER-1 Reach: Reach-1 (Continued)Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) Reach-1 25080 100 YR11800.00 465.98 483.48484.52 0.002811 8.68 1739.79 233.800.44Reach-1 25080 500 YR15100.00 465.98 484.93486.15 0.002929 9.56 2082.24 239.310.46Reach-1 25080 100 YR FD 16100.00 465.98 485.99487.10 0.002468 9.23 2338.44 244.110.43Reach-1 25040 10 YR7500.00 464.91 480.51481.04 0.001371 5.88 1286.69 132.250.31Reach-1 25040 50 YR10500.00 464.91 482.35483.12 0.001597 7.03 1551.83 166.270.34Reach-1 25040 100 YR11800.00 464.91 483.22484.06 0.001610 7.37 1705.66 188.520.35Reach-1 25040 500 YR15100.00 464.91 484.57485.66 0.001892 8.49 1976.75 215.820.38Reach-1 25040 100 YR FD 16100.00 464.91 485.64486.69 0.001676 8.36 2221.59 240.140.36Reach-1 25000 10 YR7500.00 464.00 480.46480.80 0.000876 4.69 1602.89 165.590.25Reach-1 25000 50 YR10500.00 464.00 482.34482.82 0.001028 5.55 1991.44 237.780.28Reach-1 25000 100 YR11800.00 464.00 483.23483.74 0.001040 5.77 2207.25 246.770.28Reach-1 25000 500 YR15100.00 464.00 484.62485.27 0.001242 6.58 2564.21 276.290.31Reach-1 25000 100 YR FD 16100.00 464.00 485.72486.33 0.001121 6.42 2888.87 314.900.30Reach-1 24000 10 YR7500.00 466.00 480.00 472.65 480.42 0.001053 5.22 1535.26 180.600.28Reach-1 24000 50 YR10500.00 466.00 481.80 474.17 482.37 0.001204 6.17 1946.72 276.580.30Reach-1 24000 100 YR11800.00 466.00 482.70 474.77 483.30 0.001175 6.37 2205.91 292.190.30Reach-1 24000 500 YR15100.00 466.00 484.00 476.14 484.76 0.001351 7.25 2591.73 301.390.33Reach-1 24000 100 YR FD 16100.00 466.00 485.20 476.55 485.89 0.001133 6.99 2958.66 310.160.30 140016001800200022002400260028003000480485490495500505510515Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 30130 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR4 ft/s5 ft/s6 ft/s7 ft/s8 ft/s9 ft/s10 ft/sGroundBank Sta.065.045.065 10001050110011501200125013001350480485490495500505Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27900 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank Sta.065.045.065 10001100120013001400150016001700475480485490495500505510Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27620 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR4 ft/s6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/sGroundBank Sta.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27570 This is a REPEATED section.Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR4 ft/s6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/sGroundIneffBank Sta.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27555 BR Bridge #6Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/sGroundIneffBank Sta.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27555 BR Bridge #6Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/sGroundIneffBank Sta.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27540 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/sGroundIneffBank Sta.065.045.07 1000110012001300140015001600475480485490495500Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27400 PROFILE SECTION R - SURVEY SECTION 17AStation (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR3.0 ft/s3.5 ft/s4.0 ft/s4.5 ft/s5.0 ft/sGroundBank Sta.065.045.07 1000110012001300140015001600470475480485490495500505Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27050 27050Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank Sta.07.045.075 1000110012001300140015001600470475480485490495500505Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 26880 PROFILE SECTION Q - SURVEY SECTION 17Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/sGroundBank Sta.07.045.075 10001100120013001400150016001700470475480485490495500505510Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 26700 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/sGroundBank Sta.08.045.08 10001100120013001400150016001700470475480485490495500505510Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 26300 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/sGroundBank Sta.08.045.08 10001100120013001400150016001700470475480485490495500Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 26170 26170Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/sGroundBank Sta.08.045.08 10001200140016001800470475480485490495500Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25820 25820Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR1.0 ft/s1.5 ft/s2.0 ft/s2.5 ft/s3.0 ft/s3.5 ft/s4.0 ft/s4.5 ft/sGroundBank Sta.08.045.08 1000110012001300140015001600470475480485490495500Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25725 25725Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank Sta.08.045.08 100011001200130014001500470475480485490495500Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25685 25685Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/s14 ft/sGroundBank Sta.08.045.08 10001100120013001400470475480485490495Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25550 25635Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank Sta.08.045.08 1000105011001150120012501300470475480485490495500Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25500 This is a REPEATED section.Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/sGroundIneffBank Sta.08.045.08 1000105011001150120012501300470475480485490495500Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25485 BR Bridge #5Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/sGroundIneffBank Sta.08.045.08 1000105011001150120012501300470475480485490495500Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25485 BR Bridge #5Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/sGroundIneffBank Sta.08.045.08 1000105011001150120012501300470475480485490495500Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25470 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/sGroundIneffBank Sta.08.045.08 10001100120013001400150016001700470475480485490495500Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25370 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/s14 ft/sGroundBank Sta.08.045.08 0100200300400500465470475480485490495Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25133 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/sGroundBank Sta.04.08.045.08.04 0100200300400500600465470475480485490495Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25113 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/sGroundBank Sta.04.08.045.08.04 0100200300400500600465470475480485490495Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25080 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/s8 ft/sGroundBank Sta.04.08.045.08.04 0100200300400500600460465470475480485490495Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25040 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR0 ft/s1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/sGroundBank Sta.04.08.045.045.08.04 10001200140016001800460465470475480485490495Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25000 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR0 ft/s1 ft/s2 ft/s3 ft/s4 ft/s5 ft/sGroundBank Sta.08.045.08 10001100120013001400150016001700465470475480485490495Revised 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 24000 Station (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/sGroundBank Sta.08.045.08 01000200030004000500060007000460470480490500510Revised 4/20/2021 Main Channel Distance (ft)Elevation (ft)LegendWS 100 YR FDWS 500 YRWS 100 YRWS 50 YRWS 10 YRGround D. Effective Floodway HEC-RAS 4.1.0 Output HEC-RAS Plan: EFFFW River: RIVER-1 Reach: Reach-1Reach River Sta Profile W.S. Elev Prof Delta WS E.G. Elev Top Wdth Act Q Left Q Channel Q Right Enc Sta L Ch Sta L Ch Sta R Enc Sta R(ft) (ft) (ft) (ft) (cfs) (cfs) (cfs) (ft) (ft) (ft) (ft)Reach-1 30130 100 YR502.60503.84264.51 3982.39 6511.77 5.842180.00 2222.00Reach-1 30130 100 YR Encr 502.600.01 503.89122.00 4101.23 6398.772100.00 2180.00 2222.00 2222.00Reach-1 27900 100 YR496.60497.59134.15 12.63 10487.371039.70 1164.69Reach-1 27900 100 YR Encr 496.620.02 497.62118.0110500.001039.70 1039.70 1164.69 1164.69Reach-1 27620 100 YR494.46495.91270.15 403.64 10096.361256.89 1395.68Reach-1 27620 100 YR Encr 494.480.02 495.92211.93 424.65 10075.351140.00 1256.89 1395.68 1395.68Reach-1 27570 100 YR493.44495.5580.0010500.001950.00 2063.00Reach-1 27570 100 YR Encr 493.450.01 495.5680.0010500.001950.00 1950.00 2063.00 2063.00Reach-1 27555 BR U 100 YR492.70495.3876.0010500.001950.00 2063.00Reach-1 27555 BR U 100 YR Encr 492.720.02 495.3976.0010500.001950.00 1950.00 2063.00 2063.00Reach-1 27555 BR D 100 YR492.48494.8686.0010500.001950.00 2063.00Reach-1 27555 BR D 100 YR Encr 492.500.02 494.8786.0010500.001950.00 1950.00 2063.00 2063.00Reach-1 27540 100 YR492.27494.5290.0010500.001950.00 2063.00Reach-1 27540 100 YR Encr 492.290.02 494.5390.0010500.001950.00 1950.00 2063.00 2063.00Reach-1 27400 100 YR492.83493.21288.35 4201.21 6296.68 2.111299.41 1396.97Reach-1 27400 100 YR Encr 492.840.02 493.23276.97 4215.40 6284.601120.00 1299.41 1396.97 1396.97Reach-1 27050 100 YR490.20492.25184.709561.51 938.491079.14 1152.56Reach-1 27050 100 YR Encr 490.460.26 492.31161.809354.34 1145.66 1079.14 1079.14 1152.56 1251.00Reach-1 26880 100 YR489.82491.51176.4211741.09 158.911066.51 1163.12Reach-1 26880 100 YR Encr 489.940.11 491.6692.5411900.001066.51 1066.51 1163.12 1163.12Reach-1 26700 100 YR488.26490.26169.0911872.05 27.951176.93 1346.51Reach-1 26700 100 YR Encr 488.630.36 490.46137.5311900.001176.93 1176.93 1346.51 1346.51Reach-1 26300 100 YR487.57488.50208.0811388.47 511.531129.84 1328.04Reach-1 26300 100 YR Encr 488.060.49 488.89193.0211284.63 615.37 1129.84 1129.84 1328.04 1386.00Reach-1 26170 100 YR487.33488.13241.2910795.48 1104.521034.21 1171.65Reach-1 26170 100 YR Encr 487.850.52 488.57214.1310733.65 1166.35 1034.21 1034.21 1171.65 1260.56Reach-1 25820 100 YR487.28487.56367.3310340.81 1559.191143.58 1366.33Reach-1 25820 100 YR Encr 487.690.41 488.04243.6311456.59 443.41 1143.58 1143.58 1366.33 1400.60Reach-1 25725 100 YR486.40487.30217.59 0.22 11831.15 68.631068.62 1225.35Reach-1 25725 100 YR Encr 486.960.57 487.79156.7311900.001068.62 1068.62 1225.35 1225.35 HEC-RAS Plan: EFFFW River: RIVER-1 Reach: Reach-1 (Continued)Reach River Sta Profile W.S. Elev Prof Delta WS E.G. Elev Top Wdth Act Q Left Q Channel Q Right Enc Sta L Ch Sta L Ch Sta R Enc Sta R(ft) (ft) (ft) (ft) (cfs) (cfs) (cfs) (ft) (ft) (ft) (ft)Reach-1 25685 100 YR486.00487.15154.1411900.001041.43 1195.49Reach-1 25685 100 YR Encr 486.670.67 487.67154.0611900.001041.43 1041.43 1195.49 1195.49Reach-1 25550 100 YR485.93486.94152.6311800.001016.36 1175.64Reach-1 25550 100 YR Encr 486.620.69 487.49155.1811800.001016.36 1016.36 1175.64 1175.64Reach-1 25500 100 YR486.21486.71160.0011575.74 224.261043.00 1206.00Reach-1 25500 100 YR Encr 486.840.64 487.30160.0011555.03 244.97 1043.00 1043.00 1206.00 1247.00Reach-1 25485 BR U 100 YR486.16486.70155.0011502.51 297.491043.00 1206.00Reach-1 25485 BR U 100 YR Encr 486.800.64 487.29155.0011472.11 327.89 1043.00 1043.00 1206.00 1247.00Reach-1 25485 BR D 100 YR485.97486.53155.0011511.71 288.291043.00 1206.00Reach-1 25485 BR D 100 YR Encr 486.640.67 487.14155.0011479.67 320.33 1043.00 1043.00 1206.00 1247.00Reach-1 25470 100 YR485.98486.50160.0011583.48 216.521043.00 1206.00Reach-1 25470 100 YR Encr 486.650.67 487.12160.0011561.29 238.71 1043.00 1043.00 1206.00 1247.00Reach-1 25370 100 YR484.89486.11144.9011800.001236.03 1415.24Reach-1 25370 100 YR Encr 485.810.92 486.82149.7411800.001236.03 1236.03 1415.24 1415.24Reach-1 25133 100 YR484.04484.81263.04 766.83 11009.15 24.02254.29 378.94Reach-1 25133 100 YR Encr 484.880.84 485.70124.6511800.00254.29 254.29 378.94 378.94Reach-1 25113 100 YR483.46484.70252.65 1361.57 10423.34 15.09272.82 375.75Reach-1 25113 100 YR Encr 484.120.67 485.58120.75 326.35 11473.64255.00 272.82 375.75 375.75Reach-1 25080 100 YR483.48484.52234.60 1493.61 10289.09 17.30250.07 348.90Reach-1 25080 100 YR Encr 484.030.55 485.4398.8311800.00250.07 250.07 348.90 348.90Reach-1 25040 100 YR483.22484.06188.52 44.98 11658.57 96.45280.08 393.71Reach-1 25040 100 YR Encr 484.070.84 484.83113.6311800.00280.08 280.08 393.71 393.71Reach-1 25000 100 YR483.23483.74246.77 192.36 11607.641245.80 1412.19Reach-1 25000 100 YR Encr 484.080.85 484.55155.7611800.001245.80 1245.80 1412.19 1412.19Reach-1 24000 100 YR482.70483.30292.19 138.08 11179.51 482.421146.10 1272.86Reach-1 24000 100 YR Encr 483.701.00 484.19299.27 260.19 10947.87 591.94 1000.00 1146.10 1272.86 1605.57 140016001800200022002400260028003000480485490495500505510515Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 30130 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank StaEncroachment.065.045.065 10001050110011501200125013001350480485490495500505Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 27900 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/sGroundBank StaEncroachment.065.045.065 10001100120013001400150016001700475480485490495500505510Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 27620 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/sGroundBank StaEncroachment.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 27570 This is a REPEATED section.Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/sGroundIneffBank StaEncroachment.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 27555 BR Bridge #6Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/s20 ft/sGroundIneffBank StaEncroachment.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 27555 BR Bridge #6Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/sGroundIneffBank StaEncroachment.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 27540 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/sGroundIneffBank StaEncroachment.065.045.07 1000110012001300140015001600475480485490495500Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 27400 PROFILE SECTION R - SURVEY SECTION 17AStation (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/sGroundBank StaEncroachment.065.045.07 1000110012001300140015001600470475480485490495500505Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 27050 27050Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank StaEncroachment.07.045.075 1000110012001300140015001600470475480485490495500505Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 26880 PROFILE SECTION Q - SURVEY SECTION 17Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank StaEncroachment.07.045.075 10001100120013001400150016001700470475480485490495500505510Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 26700 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank StaEncroachment.08.045.08 10001100120013001400150016001700470475480485490495500505510Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 26300 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/s8 ft/sGroundBank StaEncroachment.08.045.08 10001100120013001400150016001700470475480485490495500Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 26170 26170Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/s8 ft/sGroundBank StaEncroachment.08.045.08 10001200140016001800470475480485490495500Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 25820 25820Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR1.5 ft/s2.0 ft/s2.5 ft/s3.0 ft/s3.5 ft/s4.0 ft/s4.5 ft/s5.0 ft/sGroundBank StaEncroachment.08.045.08 1000110012001300140015001600470475480485490495500Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 25725 25725Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/sGroundBank StaEncroachment.08.045.08 100011001200130014001500470475480485490495500Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 25685 25685Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/s14 ft/sGroundBank StaEncroachment.08.045.08 10001100120013001400470475480485490495Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 25550 25635Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/s14 ft/sGroundBank StaEncroachment.08.045.08 1000105011001150120012501300470475480485490495500Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 25500 This is a REPEATED section.Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/sGroundIneffBank Sta.08.045.08 1000105011001150120012501300470475480485490495500Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 25485 BR Bridge #5Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s3 ft/s4 ft/s5 ft/s6 ft/sGroundIneffBank Sta.08.045.08 1000105011001150120012501300470475480485490495500Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 25485 BR Bridge #5Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/sGroundIneffBank Sta.08.045.08 1000105011001150120012501300470475480485490495500Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 25470 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/sGroundIneffBank Sta.08.045.08 10001100120013001400150016001700470475480485490495500Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 25370 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/s14 ft/sGroundBank Sta.08.045.08 0100200300400500465470475480485490495Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 25133 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/sGroundBank StaEncroachment.04.08.045.08.04 0100200300400500600465470475480485490495Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 25113 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/sGroundBank StaEncroachment.04.08.045.08.04 0100200300400500600465470475480485490495Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 25080 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/sGroundBank StaEncroachment.04.08.045.08.04 0100200300400500600460465470475480485490495Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 25040 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/sGroundBank StaEncroachment.04.08.045.045.08.04 10001200140016001800460465470475480485490495Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 25000 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/sGroundBank StaEncroachment.08.045.08 10001100120013001400150016001700465470475480485490495Effective FW 10/12/2020 River = RIVER-1 Reach = Reach-1 RS = 24000 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/sGroundBank Sta.08.045.08 01000200030004000500060007000460470480490500510Effective FW 10/12/2020 Main Channel Distance (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YRGround E. Corrected Effected Floodway HEC-RAS 4.1.0 Output HEC-RAS Plan: CorrEffFW River: RIVER-1 Reach: Reach-1Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) Reach-1 30130 100 YR10500.00 483.70 502.60503.84 0.004315 10.86 1551.33 264.510.51Reach-1 30130 100 YR Encr 10500.00 483.70 502.60503.89 0.004231 10.66 1292.34 122.000.50Reach-1 27900 100 YR10500.00 480.00 496.60497.59 0.002579 8.00 1323.60 134.150.42Reach-1 27900 100 YR Encr 10500.00 480.00 496.62497.62 0.002644 8.00 1313.14 118.010.42Reach-1 27620 100 YR10500.00 476.00 494.46495.91 0.004375 9.86 1249.10 270.150.53Reach-1 27620 100 YR Encr 10500.00 476.00 494.48495.92 0.004334 9.83 1224.34 211.930.53Reach-1 27570 100 YR10500.00 475.20 493.44 490.24 495.55 0.005499 11.66 900.67 350.670.61Reach-1 27570 100 YR Encr 10500.00 475.20 493.45 490.23 495.56 0.005483 11.65 901.49 104.810.61Reach-1 27555 BridgeReach-1 27540 100 YR10500.00 475.00 492.27 490.02 494.52 0.007251 12.04 871.97 228.400.68Reach-1 27540 100 YR Encr 10500.00 475.00 492.29 490.01 494.53 0.007202 12.02 873.72 103.210.68Reach-1 27400 100 YR10500.00 476.00 492.83493.21 0.001371 5.90 2393.45 288.350.31Reach-1 27400 100 YR Encr 10500.00 476.00 492.84493.23 0.001374 5.88 2393.13 276.970.31Reach-1 27050 100 YR10500.00 474.00 490.20 487.34 492.25 0.005363 11.99 1129.18 184.700.59Reach-1 27050 100 YR Encr 10500.00 474.00 490.46492.31 0.004831 11.49 1169.26 161.800.57Reach-1 26880 100 YR11900.00 474.00 489.82491.51 0.004053 10.49 1226.00 176.420.53Reach-1 26880 100 YR Encr 11900.00 474.00 489.94491.66 0.004203 10.54 1129.33 92.540.53Reach-1 26700 100 YR11900.00 474.00 488.26490.26 0.008014 11.36 1067.78 169.090.72Reach-1 26700 100 YR Encr 11900.00 474.00 488.63490.46 0.007211 10.87 1094.74 137.530.68Reach-1 26300 100 YR11900.00 470.00 487.57488.50 0.002497 7.90 1691.56 208.080.42Reach-1 26300 100 YR Encr 11900.00 470.00 488.06488.89 0.002172 7.49 1772.49 193.020.39Reach-1 26170 100 YR11900.00 472.00 487.33488.13 0.002093 7.52 1932.62 241.290.39Reach-1 26170 100 YR Encr 11900.00 472.00 487.85488.57 0.001806 7.15 1991.18 214.130.36Reach-1 25820 100 YR11900.00 470.00 487.28487.56 0.000792 4.55 3204.11 367.330.24Reach-1 25820 100 YR Encr 11900.00 470.00 487.69488.04 0.000879 4.86 2605.27 243.630.26Reach-1 25725 100 YR11900.00 472.00 486.40487.30 0.002615 7.66 1611.95 217.590.43Reach-1 25725 100 YR Encr 11900.00 472.00 486.96487.79 0.002267 7.28 1634.47 156.730.40Reach-1 25685 100 YR11900.00 470.00 486.00487.15 0.003769 8.60 1383.01 154.140.51 HEC-RAS Plan: CorrEffFW River: RIVER-1 Reach: Reach-1 (Continued)Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) Reach-1 25685 100 YR Encr 11900.00 470.00 486.67487.67 0.003000 8.01 1486.01 154.060.45Reach-1 25550 100 YR11800.00 470.00 485.93486.94 0.003032 8.05 1466.25 152.630.46Reach-1 25550 100 YR Encr 11800.00 470.00 486.62487.49 0.002471 7.51 1571.93 155.180.42Reach-1 25500 100 YR11800.00 470.00 486.21 477.46 486.71 0.000919 5.75 2131.11 175.270.27Reach-1 25500 100 YR Encr 11800.00 470.00 486.84 477.46 487.30 0.000792 5.49 2233.08 177.360.25Reach-1 25485 BridgeReach-1 25470 100 YR11800.00 470.00 485.98 477.46 486.50 0.000971 5.85 2094.39 174.530.27Reach-1 25470 100 YR Encr 11800.00 470.00 486.65 477.46 487.12 0.000828 5.57 2201.66 176.720.26Reach-1 25370 100 YR11800.00 472.00 484.89486.11 0.003979 8.89 1326.73 144.900.52Reach-1 25370 100 YR Encr 11800.00 472.00 485.81486.82 0.003013 8.07 1462.36 149.740.46Reach-1 25133 100 YR11800.00 466.95 484.04484.81 0.002105 7.26 1938.08 263.040.37Reach-1 25133 100 YR Encr 11800.00 466.95 484.88485.70 0.002170 7.28 1621.10 124.650.36Reach-1 25113 100 YR11800.00 466.46 483.46484.70 0.003932 9.47 1595.32 252.650.51Reach-1 25113 100 YR Encr 11800.00 466.46 484.12485.58 0.003992 9.81 1273.07 120.750.51Reach-1 25080 100 YR11800.00 465.98 483.48484.52 0.002811 8.68 1739.77 234.600.44Reach-1 25080 100 YR Encr 11800.00 465.98 484.03485.43 0.003515 9.52 1239.62 98.830.47Reach-1 25040 100 YR11800.00 464.91 483.22484.06 0.001610 7.37 1705.65 188.520.35Reach-1 25040 100 YR Encr 11800.00 464.91 484.07484.83 0.001487 7.03 1678.62 113.630.32Reach-1 25000 100 YR11800.00 464.00 483.23483.74 0.001040 5.77 2207.24 246.770.28Reach-1 25000 100 YR Encr 11800.00 464.00 484.08484.55 0.000925 5.51 2140.94 155.760.26Reach-1 24000 100 YR11800.00 466.00 482.70 474.77 483.30 0.001175 6.37 2205.91 292.190.30Reach-1 24000 100 YR Encr 11800.00 466.00 483.70 474.77 484.19 0.000893 5.82 2501.64 299.270.27 140016001800200022002400260028003000480485490495500505510515Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 30130 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank StaEncroachment.065.045.065 10001050110011501200125013001350480485490495500505Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27900 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/sGroundBank StaEncroachment.065.045.065 10001100120013001400150016001700475480485490495500505510Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27620 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/sGroundBank StaEncroachment.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27570 This is a REPEATED section.Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/sGroundIneffBank StaEncroachment.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27555 BR Bridge #6Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/s20 ft/sGroundIneffBank StaEncroachment.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27555 BR Bridge #6Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/sGroundIneffBank StaEncroachment.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27540 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/sGroundIneffBank StaEncroachment.065.045.07 1000110012001300140015001600475480485490495500Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27400 PROFILE SECTION R - SURVEY SECTION 17AStation (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/sGroundBank StaEncroachment.065.045.07 1000110012001300140015001600470475480485490495500505Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27050 27050Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank StaEncroachment.07.045.075 1000110012001300140015001600470475480485490495500505Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 26880 PROFILE SECTION Q - SURVEY SECTION 17Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank StaEncroachment.07.045.075 10001100120013001400150016001700470475480485490495500505510Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 26700 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank StaEncroachment.08.045.08 10001100120013001400150016001700470475480485490495500505510Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 26300 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/s8 ft/sGroundBank StaEncroachment.08.045.08 10001100120013001400150016001700470475480485490495500Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 26170 26170Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/s8 ft/sGroundBank StaEncroachment.08.045.08 10001200140016001800470475480485490495500Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25820 25820Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR1.5 ft/s2.0 ft/s2.5 ft/s3.0 ft/s3.5 ft/s4.0 ft/s4.5 ft/s5.0 ft/sGroundBank StaEncroachment.08.045.08 1000110012001300140015001600470475480485490495500Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25725 25725Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/sGroundBank StaEncroachment.08.045.08 100011001200130014001500470475480485490495500Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25685 25685Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/s14 ft/sGroundBank StaEncroachment.08.045.08 10001100120013001400470475480485490495Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25550 25635Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/s14 ft/sGroundBank StaEncroachment.08.045.08 1000105011001150120012501300470475480485490495500Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25500 This is a REPEATED section.Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/sGroundIneffBank Sta.08.045.08 1000105011001150120012501300470475480485490495500Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25485 BR Bridge #5Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s3 ft/s4 ft/s5 ft/s6 ft/sGroundIneffBank Sta.08.045.08 1000105011001150120012501300470475480485490495500Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25485 BR Bridge #5Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/sGroundIneffBank Sta.08.045.08 1000105011001150120012501300470475480485490495500Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25470 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/sGroundIneffBank Sta.08.045.08 10001100120013001400150016001700470475480485490495500Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25370 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/s14 ft/sGroundBank Sta.08.045.08 0100200300400500465470475480485490495Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25133 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/sGroundBank StaEncroachment.04.08.045.08.04 0100200300400500600465470475480485490495Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25113 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/sGroundBank StaEncroachment.04.08.045.08.04 0100200300400500600465470475480485490495Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25080 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/sGroundBank StaEncroachment.04.08.045.08.04 0100200300400500600460465470475480485490495Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25040 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/sGroundBank StaEncroachment.04.08.045.045.08.04 10001200140016001800460465470475480485490495Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25000 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/sGroundBank StaEncroachment.08.045.08 10001100120013001400150016001700465470475480485490495Correct Effect FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 24000 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/sGroundBank Sta.08.045.08 01000200030004000500060007000460470480490500510Correct Effect FW 4/20/2021 Main Channel Distance (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YRGround F. Revised Floodway HEC-RAS 4.1.0 Output HEC-RAS Plan: RevFW River: RIVER-1 Reach: Reach-1Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) Reach-1 30130 100 YR10500.00 483.70 502.60503.84 0.004315 10.86 1551.33 264.510.51Reach-1 30130 100 YR Encr 10500.00 483.70 502.60503.89 0.004231 10.66 1292.34 122.000.50Reach-1 27900 100 YR10500.00 480.00 496.60497.59 0.002579 8.00 1323.60 134.150.42Reach-1 27900 100 YR Encr 10500.00 480.00 496.62497.62 0.002644 8.00 1313.14 118.010.42Reach-1 27620 100 YR10500.00 476.00 494.46495.91 0.004375 9.86 1249.10 270.150.53Reach-1 27620 100 YR Encr 10500.00 476.00 494.48495.92 0.004334 9.83 1224.34 211.930.53Reach-1 27570 100 YR10500.00 475.20 493.44 490.24 495.55 0.005499 11.66 900.67 350.670.61Reach-1 27570 100 YR Encr 10500.00 475.20 493.45 490.23 495.56 0.005483 11.65 901.49 104.810.61Reach-1 27555 BridgeReach-1 27540 100 YR10500.00 475.00 492.27 490.02 494.52 0.007251 12.04 871.97 228.400.68Reach-1 27540 100 YR Encr 10500.00 475.00 492.29 490.01 494.53 0.007202 12.02 873.72 103.210.68Reach-1 27400 100 YR10500.00 476.00 492.83493.21 0.001371 5.90 2393.45 288.350.31Reach-1 27400 100 YR Encr 10500.00 476.00 492.84493.23 0.001374 5.88 2393.13 276.970.31Reach-1 27050 100 YR10500.00 474.00 490.20 487.34 492.25 0.005363 11.99 1129.18 184.700.59Reach-1 27050 100 YR Encr 10500.00 474.00 490.46492.31 0.004831 11.49 1169.26 161.800.57Reach-1 26880 100 YR11900.00 474.00 489.82491.51 0.004053 10.49 1226.00 176.420.53Reach-1 26880 100 YR Encr 11900.00 474.00 489.94491.66 0.004203 10.54 1129.33 92.540.53Reach-1 26700 100 YR11900.00 474.00 488.26490.26 0.008014 11.36 1067.78 169.090.72Reach-1 26700 100 YR Encr 11900.00 474.00 488.63490.46 0.007211 10.87 1094.74 137.530.68Reach-1 26300 100 YR11900.00 470.00 487.57488.50 0.002497 7.90 1691.56 208.080.42Reach-1 26300 100 YR Encr 11900.00 470.00 488.06488.89 0.002172 7.49 1772.49 193.020.39Reach-1 26170 100 YR11900.00 472.00 487.33488.13 0.002093 7.52 1932.62 241.290.39Reach-1 26170 100 YR Encr 11900.00 472.00 487.85488.57 0.001806 7.15 1991.18 214.130.36Reach-1 25820 100 YR11900.00 470.00 487.28487.56 0.000792 4.55 3204.11 367.330.24Reach-1 25820 100 YR Encr 11900.00 470.00 487.69488.04 0.000879 4.86 2605.27 243.630.26Reach-1 25725 100 YR11900.00 472.00 486.40487.30 0.002615 7.66 1611.95 217.590.43Reach-1 25725 100 YR Encr 11900.00 472.00 486.96487.79 0.002267 7.28 1634.47 156.730.40Reach-1 25685 100 YR11900.00 470.00 486.00487.15 0.003769 8.60 1383.01 154.140.51 HEC-RAS Plan: RevFW River: RIVER-1 Reach: Reach-1 (Continued)Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) Reach-1 25685 100 YR Encr 11900.00 470.00 486.67487.67 0.003000 8.01 1486.01 154.060.45Reach-1 25550 100 YR11800.00 470.00 485.93486.94 0.003032 8.05 1466.25 152.630.46Reach-1 25550 100 YR Encr 11800.00 470.00 486.62487.49 0.002471 7.51 1571.93 155.180.42Reach-1 25500 100 YR11800.00 470.00 486.21 477.46 486.71 0.000919 5.75 2131.11 175.270.27Reach-1 25500 100 YR Encr 11800.00 470.00 486.84 477.46 487.30 0.000792 5.49 2233.08 177.360.25Reach-1 25485 BridgeReach-1 25470 100 YR11800.00 470.00 485.98 477.46 486.50 0.000971 5.85 2094.39 174.530.27Reach-1 25470 100 YR Encr 11800.00 470.00 486.65 477.46 487.12 0.000828 5.57 2201.66 176.720.26Reach-1 25370 100 YR11800.00 472.00 484.89486.11 0.003979 8.89 1326.73 144.900.52Reach-1 25370 100 YR Encr 11800.00 472.00 485.81486.82 0.003013 8.07 1462.36 149.740.46Reach-1 25133 100 YR11800.00 466.95 484.04484.81 0.002105 7.26 1935.73 256.400.37Reach-1 25133 100 YR Encr 11800.00 466.95 484.88485.70 0.002170 7.28 1621.10 124.650.36Reach-1 25113 100 YR11800.00 466.46 483.46484.70 0.003932 9.47 1591.77 240.570.51Reach-1 25113 100 YR Encr 11800.00 466.46 484.12485.58 0.003992 9.81 1273.07 120.750.51Reach-1 25080 100 YR11800.00 465.98 483.48484.52 0.002811 8.68 1739.79 233.800.44Reach-1 25080 100 YR Encr 11800.00 465.98 484.03485.43 0.003515 9.52 1239.62 98.830.47Reach-1 25040 100 YR11800.00 464.91 483.22484.06 0.001610 7.37 1705.65 188.520.35Reach-1 25040 100 YR Encr 11800.00 464.91 484.07484.83 0.001487 7.03 1678.62 113.630.32Reach-1 25000 100 YR11800.00 464.00 483.23483.74 0.001040 5.77 2207.24 246.770.28Reach-1 25000 100 YR Encr 11800.00 464.00 484.08484.55 0.000925 5.51 2140.94 155.760.26Reach-1 24000 100 YR11800.00 466.00 482.70 474.77 483.30 0.001175 6.37 2205.91 292.190.30Reach-1 24000 100 YR Encr 11800.00 466.00 483.70 474.77 484.19 0.000893 5.82 2501.64 299.270.27 140016001800200022002400260028003000480485490495500505510515Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 30130 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank StaEncroachment.065.045.065 10001050110011501200125013001350480485490495500505Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27900 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/sGroundBank StaEncroachment.065.045.065 10001100120013001400150016001700475480485490495500505510Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27620 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/sGroundBank StaEncroachment.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27570 This is a REPEATED section.Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/sGroundIneffBank StaEncroachment.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27555 BR Bridge #6Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/s20 ft/sGroundIneffBank StaEncroachment.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27555 BR Bridge #6Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/sGroundIneffBank StaEncroachment.065.045.07 1000120014001600180020002200240026002800475480485490495500505510Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27540 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR6 ft/s8 ft/s10 ft/s12 ft/s14 ft/s16 ft/s18 ft/sGroundIneffBank StaEncroachment.065.045.07 1000110012001300140015001600475480485490495500Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27400 PROFILE SECTION R - SURVEY SECTION 17AStation (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/sGroundBank StaEncroachment.065.045.07 1000110012001300140015001600470475480485490495500505Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 27050 27050Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank StaEncroachment.07.045.075 1000110012001300140015001600470475480485490495500505Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 26880 PROFILE SECTION Q - SURVEY SECTION 17Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank StaEncroachment.07.045.075 10001100120013001400150016001700470475480485490495500505510Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 26700 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/sGroundBank StaEncroachment.08.045.08 10001100120013001400150016001700470475480485490495500505510Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 26300 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/s8 ft/sGroundBank StaEncroachment.08.045.08 10001100120013001400150016001700470475480485490495500Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 26170 26170Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/s8 ft/sGroundBank StaEncroachment.08.045.08 10001200140016001800470475480485490495500Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25820 25820Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR1.5 ft/s2.0 ft/s2.5 ft/s3.0 ft/s3.5 ft/s4.0 ft/s4.5 ft/s5.0 ft/sGroundBank StaEncroachment.08.045.08 1000110012001300140015001600470475480485490495500Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25725 25725Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/sGroundBank StaEncroachment.08.045.08 100011001200130014001500470475480485490495500Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25685 25685Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/s14 ft/sGroundBank StaEncroachment.08.045.08 10001100120013001400470475480485490495Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25550 25635Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/s14 ft/sGroundBank StaEncroachment.08.045.08 1000105011001150120012501300470475480485490495500Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25500 This is a REPEATED section.Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/sGroundIneffBank Sta.08.045.08 1000105011001150120012501300470475480485490495500Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25485 BR Bridge #5Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s3 ft/s4 ft/s5 ft/s6 ft/sGroundIneffBank Sta.08.045.08 1000105011001150120012501300470475480485490495500Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25485 BR Bridge #5Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/sGroundIneffBank Sta.08.045.08 1000105011001150120012501300470475480485490495500Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25470 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/sGroundIneffBank Sta.08.045.08 10001100120013001400150016001700470475480485490495500Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25370 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR2 ft/s4 ft/s6 ft/s8 ft/s10 ft/s12 ft/s14 ft/sGroundBank Sta.08.045.08 0100200300400500465470475480485490495Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25133 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/sGroundBank StaEncroachment.04.08.045.08.04 0100200300400500600465470475480485490495Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25113 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/sGroundBank StaEncroachment.04.08.045.08.04 0100200300400500600465470475480485490495Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25080 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/s10 ft/sGroundBank StaEncroachment.04.08.045.08.04 0100200300400500600460465470475480485490495Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25040 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s2 ft/s4 ft/s6 ft/s8 ft/sGroundBank StaEncroachment.04.08.045.045.08.04 10001200140016001800460465470475480485490495Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 25000 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/sGroundBank StaEncroachment.08.045.08 10001100120013001400150016001700465470475480485490495Revised FW 4/20/2021 River = RIVER-1 Reach = Reach-1 RS = 24000 Station (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YR0 ft/s1 ft/s2 ft/s3 ft/s4 ft/s5 ft/s6 ft/s7 ft/sGroundBank Sta.08.045.08 01000200030004000500060007000460470480490500510Revised FW 4/20/2021 Main Channel Distance (ft)Elevation (ft)LegendWS 100 YR EncrWS 100 YRGround P.O. Box 978 ● 23221 Oak Grove Rd. ● Bullard, Texas 75757 903.894.6410 (O) ● 903.894.7511 (F) ● www.RowdenConsulting.com July 11, 2011 U.S. Fish and Wildlife Service Arlington, Texas, Ecological Services 711 Stadium Dr., Suite 252 Arlington, TX 76011 RE: Request for Review per FEMA Memorandum 64 Timothy Pletta Residential Improvement - 150 Bethel Road, Coppell, TX Dear Sir or Madam: Rowden Consulting, LLC represents Timothy Pletta, a homeowner who is planning to place fill within a floodplain in order to expand yard space and address safety concerns along a stream channel at his residence in Coppell, Texas. Mr. Pletta’s engineering team is coordinating the project with the Federal Emergency Management Administration (FEMA), and the project will require a Conditional Letter of Map Revision (CLOMR). In accordance with FEMA’s Memorandum 64 “Compliance with the Endangered Species Act (ESA) for Letters of Map Change” dated October 1, 2010, we are requesting USFWS review and concurrence so that we may have documented compliance with the ESA. Please find enclosed a biological evaluation of the subject site, which has concluded that the proposed project should have no effect on federally-listed endangered or threatened species of wildlife. The proposed project will also affect waters of the U.S. under Section 404 of the Clean Water Act and a Section 404 permit has been issued by the U.S. Army Corps of Engineers. The Corps found that impacts within their jurisdiction will have no effect on listed species. A copy of the 404 permit is included herein for reference. Thank you for your help with this matter. Sincerely, Rowden Consulting, LLC Jeremy Rowden, PG Enclosures BIOLOGICAL EVALUATION Project: Prepared For: Pletta Residential Improvements Timothy Pletta 150 Bethel Road 150 Bethel Road Coppell, Texas 75019 Coppell, Texas 75019 Rowden Project No. 11.16 © July 11, 2011 Rowden Consulting, LLC 23221 Oak Grove Rd. ● Bullard, Texas 75757 903.894.6410 ● Fax 903.894.7511 ROWDEN CONSULTING, LLC TIMOTHY PLETTA RESIDENTIAL IMPROVEMENTS BIOLOGICAL EVALUATION 150 BETHEL ROAD, COPPELL, TEXAS Page 1 SITE DESCRIPTION Rowden Consulting, LLC has prepared this Biological Evaluation of endangered and threatened species to document compliance with the Endangered Species Act, as required by the Federal Emergency Management Agency’s (FEMA) Memorandum 64 “Compliance with the Endangered Species Act (ESA) for Letters of Map Change” dated October 1, 2010. The project owner, Timothy Pletta, is requesting a Conditional Letter of Map Revision (CLOMR) from FEMA which requires the submittal of this evaluation to the U.S. Fish and Wildlife Service. The property is privately owned and the nature of the project includes the placement of 134 linear feet (0.026 acres) of intermittent stream channel in concrete box culvert. In addition, fill will be placed within a floodplain to facilitate the construction of an approximately 2,000 square foot guest home (see Appendix I). The top of the concrete culvert will be covered with select fill graded to match the topography of the adjacent yard. In order to construct the adjacent guest home, fill will be placed within the floodplain, and the fill will be retained with an engineered retaining wall. On-site visual reconnaissance of the property was conducted on February 24, 2011 by Jeremy Rowden. Where important features were noted, photographs were taken to document the features and environmental conditions observed during the reconnaissance. The study area comprises approximately 1.14 acres. The property currently has one residential structure and two open channels, one of which is a large perennial stream known as Grapevine Creek. A floodplain exists along Grapevine Creek, and this floodplain will be partially filled (the reason for getting a CLOMR). The entire study area is characterized as uplands, except for two streams. Grapevine Creek flows along the north side of the property and one incised, intermittent stream channel bisects the southern side of the property. Species of vegetation were evaluated at one representative sample plot near the location of proposed fill. Species of vegetation were subjectively determined by estimating those with the largest relative basal area, the greatest height, the greatest percentage of areal cover, and/or the greatest number of stems. The riparian zone along the streams is mostly forested with trees and shrubs. Dominant species included eastern red cedar (Juniperus virginiana), greenbriar (Smilax bona-nox), Shumard oak (Quercus shumardii), and post oak (Quercus stellata). A review of the United States Department of Agriculture (USDA) Soil Survey of Dallas County, Texas was conducted. A soil pit was excavated to evaluate soil characteristics. According to the soil survey, Silawa fine sandy loam soils are mapped on the property. However, this soil series was not identified at the sample plot. The soils were found to be dark clay more typical of a Houston black clay, or similar. The soil exhibited a low chroma; however, the color was typical of blackland clays rich in organic matter. Wetlands were not identified on the property. The hydrology of the smaller stream was determined to be intermittent and Grapevine Creek is a perennial stream. The smaller stream was very incised and eroded down to the shale bedrock. The stream exhibited a steady flow at the time of observation, but a moderate rain event had just occurred. According to the landowner, the stream has a trickle of a base flow throughout most of the year, but typically dries up completely during the summer months. ROWDEN CONSULTING, LLC TIMOTHY PLETTA RESIDENTIAL IMPROVEMENTS BIOLOGICAL EVALUATION 150 BETHEL ROAD, COPPELL, TEXAS Page 2 FEDERALLY-LISTED SPECIES The listed endangered or threatened species for Dallas County, Texas include the black-capped Vireo (Vireo atricapilla), the golden-cheeked warbler (Denroica chrysoparia), the least tern (Sterna antillarum), the mountain plover (Charadrius montanus), the piping plover (Charadrius melodus), and the whooping crane (Grus americana). The preferred habitat of the black-capped vireo includes rangelands with scattered clumps of shrubs separated by open grassland. Black-capped vireos nest in Texas during April through July, and spend the winter on the western coast of Mexico. No critical habitat rules have been published for the black-capped vireo. The typical habitat of the golden-cheeked warbler includes tall, dense, mature stands of Ashe juniper (blueberry cedar) mixed with hardwood trees. This type of woodland generally grows in relatively moist areas. Generally, trees required for nesting habitat are at least 15 feet tall with a trunk diameter of about five inches at four feet from the ground. The essential element is that juniper trees have shredding bark, at least near the base of the tree. No critical habitat rules have been published for the golden-cheeked warbler. The typical habitat of the least tern includes sparsely vegetated sandbars along rivers, sand and gravel pits, or lake and reservoir shorelines. No critical habitat rules have been published for the least tern. The typical habitat of the mountain plover in the Great Plains is short-grass prairie dominated by blue grama. Mountain plovers have been found in taller grasses at sites that were heavily grazed or associated with prairie-dog colonies. Wintering populations in Texas are found on coastal prairies, alkaline flats, plowed fields, and Bermuda grass fields. No critical habitat rules have been published for the mountain plover. The typical habitat of the piping plover in the Great Plains nest in open, sparsely vegetated sand or gravel beaches adjacent to alkali wetlands, and on beaches, sand bars, and dredged material islands of major river systems. Piping plovers winter along the South Atlantic, Gulf Coast, and Caribbean beaches and barrier islands. No critical habitat has been established near the property for the piping plover. The typical habitat of the whooping crane includes salt flats and marshes. No critical habitat has been established near the property for the whooping crane. DETERMINATION OF EFFECTS Black-capped vireo The vegetation at the subject site is mostly forested without scattered clumps of trees within open grassland. Because of this, the site has the potential to be considered as habitat for the black- capped vireo and there should be no effect. Golden-cheeked warbler The habitat found on the site is similar to warbler’s required habitat, but lacks the concentrations of ashe juniper required for nesting material and the site is located in a developed area of town with very little contiguous habitat. Therefore, the project should have no effect on this species. ROWDEN CONSULTING, LLC TIMOTHY PLETTA RESIDENTIAL IMPROVEMENTS BIOLOGICAL EVALUATION 150 BETHEL ROAD, COPPELL, TEXAS Page 3 Least Tern The project is not located near any sparsely vegetated sandbars, sand and gravel pits, or lake shorelines. Therefore, construction activities should have no effect on the least tern. Mountain Plover There is no open prairie or grassland on the property, so the project should have no effect on this species. Piping Plover There are no beaches, sand bars, or dredged material on the property. Therefore, construction activities should have no effect on the piping plover. Whooping Crane There are no wetlands on or near the property. Therefore, site construction should have no effect on the whooping crane. SUMMARY No significant adverse effects are likely to occur as a result of the placement of fill on the subject site for any of the listed species. No significant direct or indirect effects on listed species are anticipated. No significant interdependent or interrelated effects on listed species are anticipated. No significant cumulative effects on listed species are anticipated. No incidental takings of listed species are anticipated. Since no significant adverse effects on listed endangered or threatened species are anticipated, no specific conservation measures are warranted. ROWDEN CONSULTING, LLC TIMOTHY PLETTA RESIDENTIAL IMPROVEMENTS BIOLOGICAL EVALUATION 150 BETHEL ROAD, COPPELL, TEXAS Page 4 REFERENCES Kirby, H.P., O.M. Buchanan, Jr. and F.W. Miller. 1960. Occurrence and breeding of the Golden- cheeked Warbler in Dallas County, Texas. Condor 62:66. Texas Parks and Wildlife (TPW). Webpage: Black-capped Vireo. http://www.tpwd.state.tx.us/huntwild/wild/species/bcv/ Texas Parks and Wildlife (TPW). Webpage: Golden Cheeked Warbler. http://www.tpwd.state.tx.us/publications/pwdpubs/media/pwd_bk_w7000_0013_golden_ch eeked_warbler.pdf Texas Parks and Wildlife (TPW). Webpage: Whooping Crane. http://www.tpwd.state.tx.us/huntwild/wild/species/whooper/ U.S. Fish and Wildlife Service (USFWS) South Dakota Field Office. Webpage: Mountain Plover. http://www.fws.gov/southdakotafieldoffice/MPLOVER.HTM U.S. Fish and Wildlife Service (USFWS). Webpage: All About Piping Plovers. http://www.fws.gov/plover/facts.html U.S. Fish and Wildlife Service (USFWS). Webpage: Least Tern (Interior Population). March 9, 2011. http://www.fws.gov/midwest/endangered/birds/tern.html ROWDEN CONSULTING, LLC TIMOTHY PLETTA RESIDENTIAL IMPROVEMENTS BIOLOGICAL EVALUATION 150 BETHEL ROAD, COPPELL, TEXAS Page 5 SIGNATURE OF CONSULTANT This Biological Evaluation has been prepared under the direction and supervision of the environmental professional undersigned below. The field work, as well as review and interpretation of information upon which the report is based were all portions of the evaluation performed by the undersigned. Other information has been provided to the environmental professional by others including, but not limited to, third party vendors, and government agencies. ____________________ Jeremy W. Rowden, P.G. Appendices APPENDIX I MAPS, FIGURES, AND PHOTOGRAPHS Timothy Pletta - Photos of Stream to be Placed in Culvert Culverts Subject stream flowing from below Bethel Road immediately following rain event. Erosion Below Deck Erosion from stream threatening deck. P P Timothy Pletta - Photos of Stream to be Placed in Culvert Stream View looking downstream along block retaining wall. P Stream View looking upstream between two retaining walls. Owner concerned about safety. P Timothy Pletta - Photos of Stream to be Placed in Culvert Stream View looking upstream along block and concrete retaining wall. P Stream Downstream end of channel near location of proposed headwall. P Timothy Pletta - Photos of Stream to be Placed in Culvert Stream View looking upstream along top of bank. P Erosion Eroded stream bank on west side of channel just upstream of concrete retaining wall. P ROWDEN CONSULTING, LLC TIMOTHY PLETTA RESIDENTIAL IMPROVEMENTS BIOLOGICAL EVALUATION 150 BETHEL ROAD, COPPELL, TEXAS Appendices APPENDIX II COPY OF 404 PERMIT ROWDEN CONSULTING, LLC TIMOTHY PLETTA RESIDENTIAL IMPROVEMENTS BIOLOGICAL EVALUATION 150 BETHEL ROAD, COPPELL, TEXAS Appendices APPENDIX III QUALIFICATIONS OF CONSULTANT Statement of Qualifications Environmental Services QUALIFICATIONS OF ENVIRONMENTAL PROFESSIONAL Jeremy W. Rowden, P.G. Owner / Principal Consultant Education Texas A&M University Bachelor of Science - 1999 Bio-Environmental Science Stephen F. Austin State University Master of Science Environmental Science - 2002 Professional Registration Texas Board of Professional Geoscientists, (Lic. No. 10052) TCEQ OSSF Site Evaluator (Lic. No. OS0028330) Professional Organization Texas Association of Professional Geoscientists Professional Experience Mr. Rowden has over twelve (12) years of experience in providing professional environmental consulting services. Prior to establishing Rowden Consulting, LLC, Mr. Rowden managed the environmental program at Adams Engineering, a reputable Civil and Environmental Engineering Company in Tyler, Texas. Known nationally as an expert in many environmental fields, Mr. Rowden provides comprehensive solutions to a wide variety of environmental issues. Examples of his services include Phase I environmental site assessments, Phase II environmental site assessments, groundwater studies, contaminant fate and transport studies, remediation planning and implementation, wetland delineation, wetland mitigation, wetland permitting, industrial storm water permitting and many others. Mr. Rowden has participated in approximately 1,000 Phase I ESAs, and often provides peer reviews of Phase I and II environmental site assessments performed by other consultants. Mr. Rowden’s experience with the Texas Risk Reduction Program offers clients a valuable resource in conducting risk-based assessments of contaminated properties. Mr. Rowden has facilitated the redevelopment of many contaminated properties through corrective action and remediation. In addition, Mr. Rowden applies his knowledge of soil science as a competent and experienced wetland scientist and on-site sewage facility site evaluator. Mr. Rowden has extensive experience delineating wetlands and other waters of the U.S. Mr. Rowden assists clients in obtaining Section 404 permits from the U.S. Army Corps of Engineers, develops mitigation plans, and creates wetland mitigation banks. E BETHEL RDMEADOWCREEK R D S DENTON TAPN DENTON TAPPENUEL DR GLENDALE DR OAKCREST DRHUNTERS RIDGE RTOWER CT BETHAL RD MAYWOO D C I R HIDDEN VALLEY D MASON CTSHILOH CT SALEM CTASHER CTDocument Path: \\Gei-server\projects\PLETTA-001D Pletta CLOMR and LOMR\GIS\CLOMR Annotated FIRM 8.5 x 11 - L.mxdANNOTATED Legend Pletta Property Floodplain Change Limit 490480470480470480470480470470480480480470470480480 490 490500490480470470470490500490LEGENDNOTES:1. ELEVATION DATUM IS NAVD88.2. ON SITE CONTOURS DEVELOPED FROM A SURVEY OF LOT 2RPERFORMED BY GEOMATIC SOLUTIONS INC, 3000 SOUTH HULEN,#124-236, FORT WORTH, TEXAS 76109.3. SURROUNDING CONTOURS DEVELOPED FROM 2001 LIDAR POINTSOBTAINED FROM THE NORTH CENTRAL TEXAS COUNCIL OFGOVERNMENTS.4. COORDINATES AND HORIZONTAL DISTANCES FOR THIS SURVEY AREIN U.S. SURVEY FEET AND ARE BASED ON THE NORTH AMERICANDATUM OF 1983 TEXAS NORTH CENTRAL ZONE 4202 STATE PLANECOORDINATE SYSTEM ADJUSTED TO SURFACE.5. 2020 PROPERTY BOUNDARIES ARE BASED ON DALLAS COUNTYAPPRAISAL DISTRICT.6. PROPOSED CHANGES DO NOT AFFECT THE FLOODWAY.011% ANNUAL CHANCETOPOGRAPHIC WORKMAP0 25 5010075SCALE: 1" = 50'NPROJECT NAME:CLIENT:Phone: (210) 342-3991San Antonio, Texas 78209515 Busby DriveTX Registration #F-002573SHEET TITLE:DESIGNED BY:SHEET NUMBER:OFCHECKED BY:DRAWN BY:PROJECT NUMBER:PROJECT LOCATION:REVISIONDATEPHASE:DATE:#ENGINEERING, INC.0210/27/2020PLETTA-001D146 EAST BETHEL ROADCOPPELL, TX 75019CLOMRPLETTA PROPERTYCLOMRTimothy Pletta\\Gei-server\projects\PLETTA-001D Pletta CLOMR and LOMR\CLOMR Drawing\1% AC Topo Work Map.dwg LDGLDGCRM01/07/2021Corrected Existing Floodplain1 490480470480470480470480470470480480480470470480480 490 490500490480470470470490500490LEGENDNOTES:1. ELEVATION VERTICAL DATUM IS NAVD88.2. ON SITE CONTOURS DEVELOPED FROM A SURVEY OF LOT 2RPERFORMED BY GEOMATIC SOLUTIONS INC, 3000 SOUTH HULEN,#124-236, FORT WORTH, TEXAS 76109.3. SURROUNDING CONTOURS DEVELOPED FROM 2001 LIDAR POINTSOBTAINED FROM THE NORTH CENTRAL TEXAS COUNCIL OFGOVERNMENTS.4. COORDINATES AND HORIZONTAL DISTANCES FOR THIS SURVEY AREIN U.S. SURVEY FEET AND ARE BASED ON THE NORTH AMERICANDATUM OF 1983 TEXAS NORTH CENTRAL ZONE 4202 STATE PLANECOORDINATE SYSTEM ADJUSTED TO SURFACE.5. 2020 PROPERTY BOUNDARIES ARE BASED ON DALLAS COUNTYAPPRAISAL DISTRICT.PROJECT NAME:CLIENT:Phone: (210) 342-3991San Antonio, Texas 78209515 Busby DriveTX Registration #F-002573SHEET TITLE:DESIGNED BY:SHEET NUMBER:OFCHECKED BY:DRAWN BY:PROJECT NUMBER:PROJECT LOCATION:REVISIONDATEPHASE:DATE:#ENGINEERING, INC.0210/27/2020PLETTA-001D146 EAST BETHEL ROADCOPPELL, TX 75019CLOMRPLETTA PROPERTYCLOMRTimothy Pletta\\GEI-SERVER\projects\PLETTA-001D Pletta CLOMR and LOMR\CLOMR Drawing\100-Yr Fully Developed Topo Work Map.dwg LDGLDGCRM021% FULLY DEVELOPEDTOPOGRAPHIC WORKMAP0 25 5010075SCALE: 1" = 50'N