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Copperstone FS-CS 890406 (3)4P, Jer'~J Parch~ Consulting Engineers April 6, 1989 Russe/1 Doyle, P.E. '~ i? [1~?~ ~" Mr. City En~neer ' -~ ~''~* ":~ LJ 'ul/ ~ ~ ci~ o~co~ ~ ~0~ ~ P O B~ 478 214/462-0022 , RE: JP NO. 88009; Flood Plain Reclamation Study; West of Denton Tap Road; Parks of Coppell; Coppell, Texas Dear Russell: On February 21, 1989 our firm submitted three copies of a report entitled Flood Plain Reclamation Stu~on Cottonwood Branch and D~9~C__reek, Parks of Co~_!q_~.l~_Co~pe_~_~_Texas to the City. This report contained a description of proposed reclamation of flood plain land in the Parks of Coppell on Cottonwood Branch and Denton Creek west of Denton Tap Road. The report included hydraulic models, exhibits, and channel cross sections as documentation for our request to the City and to FEMA for a Conditional Letter of Map Revision. We requested that the City review the study and submit the study to FEMA with an endorsement of the project. I have received a letter from FEMA dated March 28, 1989 advising me that they are currently reviewing our study to determine the appropriate processing procedure. Thank you for expediting the submittal of this study to FEMA so that they may begin their review. On March 31, 1989 you provided me with a list of comments from Mr. Ron Morrison, P. E. of Kimley-Horn and Associates, Inc., who reviewed our study for compliance with local requirements on behalf of the City. A copy of Mr. Morrison's letter to you of March 28, 1989 is enclosed. Our responses to Mr. Morrison's comments are presented herein, however, I would first like to present correspondence which established the basis for our hydraulic analysis. All seven comments listed in Mr. Morrison's letter refer to the current City flood plain ordinance number 87390. In October, 1988, upon our submittal of a flood plain reclamation study to permit filling in the flood plain for construction of Parkway Boulevard extending west of Denton Tap Road and the High School Access Road, you and I had a discussion and exchanged correspondence regarding the "Grandfathered" status~of.~ the~.flood plain property in the Parks of Coppell' west' 6f'Dent6 320 V,/estway Place, Suite 501 * Arlington, Texas 76018 * Metro 1817J 467-2418 * J817J 465-0259 M~. Russell Doyle, P.E. JP No. 88009 April 6, 1989 Page 3 of 4 With specific regards to Comment No. 2, I agree that the minimum floor level should be set at base flood elevation (100-year flood level with existing development conditions) plus two feet. This will result in an added factor of safet~ and minimum floor levels will therefore exceed requirements stated in Ordinance No. 219. Since projects upstream and downstream of the Parks of Coppell area have already been developed, however, no further adjustments in computed flood levels are anticipated.Q In response to Comment No. 6, a letter is attached from the Corps I of Engineers evidencing approved 404 Permit status of this project. In response to Comment No. 7, I will coordinate with you or your staff to seal copies of the report previously submitted to you. To the best of my knowledge, FEMA does not require an engineer's ? seal on reports that are a part of Conditional Map Revision . request. Finally, a general comment on page two in the last paragraph of Mr. Morrison's letter indicates that our report should address erosin, flood levels and other impacts for frequencies mentioned in the March 28, 1989 correspondence. As stated in our report, these impacts on Denton Creek are insignificant since in downstream reaches, encroachments are in non-effective flo~ areas. In upstream reaches where the north property line of the Parks of Coppell lies in the creek, no flood plain encroachments - are proposed. Therefore conditions in Denton Creek during the 100-year flood and other frequencies ~are similar to current- conditions. Please refer to Table 3 on Page 10 of our report. On Cottonwood Branch, bank protection is proposed in the vicinity of the Parkway Boulevard bridge. In other reaches, no alterations are proposed and velocities are very similar to velocities in the existing channel. This is evidenced by comparision of channel velocities given in the first profile of the existing conditions model {See Page 19 - Model CEX3) and the first profile of the proposed condition model (See Page 21-Model CPR4). I trust that the above will satisfactorily address the concerns listed in Mr. Morrison's letter. If you concur that the results of our study are in compliance with the requirements of the City of Coppell, please provide a letter to FEMA endorsing our request for a Conditional Letter oX Map Revision for this project. M~. Russell Doyle, P.E. JP No. 88009 April 6, 1989 Page 4 of 4 If you have any questions, please call. Sincerer/ ~Jer~rparche', P.E. JP:ch Enclosures: Kimley-Horn Letter - 3/28/89 Letter from Corps of Engineers - 1/18/89 Letter from me to R. Doyle - 10/14/88 Letter from R. Doyle to me - 10/7/88 Letter from FEMA - 9/24/87 Letter from Ginn to me - 6/21/88 Letter from me to FEMA - 6/17/88 Letter from me to Carl Anderson - 6/17/88 Letter from me to Ginn - 6/8/88 Letter from W. Ginn, City Engineer - 5/25/88 Letter from FEMA to Ginn - 5/3/88 Letter from Univest - 4/14/88 Letter from M. Baker, Jr. Inc. - 11/8/82 ordinance No. 219 - City of Coppell cc: Mr. Ron Morrison, p.E./Kimley-Horn and Associates - w/encl. Mr. Jay Chester, P.E./ABQ Development Corporation 'TO ~ Kimley-Horn and Associates, Inc. 12660 Coil Road, Suite 200, Dallas, Texas · (214) 386-7007 -~ Raleigh. Charlotte. Nashville. Vh. ginia Beach. Dallas. Phoenix. West Palm Beach. Tampa. Oflaodo. F t t~aude~ale, V~'o Beach. F t. Myer. Stua, March 28, 1989 M r. Russ_e/D~o/i'51e City En~neer City of~'oppell 732 De Forest Coppell, Texas 75019 Re: Review of Floodplain Reclamation Study by Jerry Parche' Consulting Engineer Dear Mr. Doyle: We have reviewed the subject study and we offer the following comments: (all references to articles refer to Coppell City Ordinance Number 87390) I. Article 4C-2 requires that all models must evaluate discharges for the 2-year, 100-year existing, 100-year ultimate and low flow conditions. The subject study only considered the 100-year existing conditions. 2. Article 4C-2(a) requires that the lowest floor of any proposed structure in the reclaimed area be elevated higher than the base flood plus two feet and the 100 year ultimate condition flood plus one foot. We suggest that this statement be included in the approval report so that there is no confusion about future development. 3. Article 4C-2(b) requires that the existing and fully developed 100-year floodplain be delineated. The subject report only delineated the existing 100-year. 4. Article 4C-2(c) requires that flood storage loss data be provided so that the City may evaluate ira impact, this has not been provided in the subject report. 5. Article 4C-2(e) requires that Flood levels caused by the development plus any anticipated future developments must be less than the 100-year ultimate flood level and the 1980 FIS base flood elevation plus one foot. A table showing this comparison should be provided with the report. 6. Article 4C-2(g) requires that evidence be submitted showing that appropriate permits have been obtained or coordinated. Evidence of coordination for a Corps of Engineers Section 404 permit is required before this project can be submitted to FEMA. 7. Article 5B-I-2 requires that any report of this nature should be sealed by a Registered Professional Engineer. To satisfy this requirement Mr. Parche' should seal the report. ~'EcEIYgE) Building client relationship~ since Ig67 JMI? I~hI ~I [nlm' Mr. Russell Doyle Page Two March 28, 1989 In addition to the specific requirements above, the report should address any impacts of the proposed reclamation such as erosion, flood levels, and other impacts not just for the 100-year existing condition, but the other frequencies mentioned above. In preparation of any response, Mr. Parche' should specifically address any differences between the existing condition model in this report and the existing conditions model presented. Let us know if you have any questions or comments. Sincerely, KIML~Y-HORN AND ASSOCIATES, INC. l~onald W. Morrison, P.E. dd 919101.rd DEPARTMENT OF THE ARMY FORT WORTH DISTRICT. CORPS OF ENGINEERS P. O. SOX 17300 FORT WORTH. TEXAS 76102'0300 Jantmry 18, 1989 Operations Division Office Operations Branch SUBJECr: Project Number 8800361 Hr. Jerry Parche' Jerry Parche' Consulting F~gineers 320 Westway Place, Suite 501 Arlington, Texas 76018 Dear Mr. Parche': Tb~ank you for your letters of November 30, 1988 and January lO, 1989, concerning the pro~s~ 109.7 acre Parks of C~Pl~ll project located south of ~nton Creek and west of Denton Tap R~d within Copl~[l, ~[las Connty, Texas. Your project has ~en assign~ Project Nt~r 8800361; a[l future corres~ndence concerning your project should include this numar. Failure to reference the project number on future corres~ndence will result in a delay. Your project has ~en review~ in accordance with S~tion 404 of the Clean Water Act under which the U.S. ~Y Corps of Engineers regulates the discharge of dr~ and fill ~terial into waters of the United States including ad.iacent wetlands. ~s~ on your description of the pro~s~ work a~ a[l infor~tion available to tlS, Wo have determine] that your project will involve such discharges and will r~uire prior ~r~n[~.,O~ authori~tion %~er Section 404 of the Clean Water A general ~it applicable to yo~w pro,ject ~s ~en issu~ on a nationwide basis for diRc~hargos in~o waters of tho Unit~[ States. This nationwide I~rmit authorizes discharges of dr~g~ or fill ~gteria[ into non-tidal rivers, streams, and their lakes impoundments, including adjacent wetlands, t~mt are loc, t~ a~ve the hoadwaters and other non-tidal waters of the United States, includin~ adjacent wetlands, tb~t are ;~ot [~rt of a surface tributary syst~ to interstate waters or navigable waterq of the United States (i.e.. isolat~ waters) provid~ the activity does not cause the loss or ~ubstanti~] adverse ~ification of one or more acres of water's of the United S~tes. For disclmrges which will c~use the loss or subst~ntia[ adverse m~ification to one or ~re acres of waters of the Unit~ States, ~itten ~r~nt of the Army nuthori~tion will be r~luired prior to initiation ~ECEIVED JArl 2 0 FJ89 -2- The only requirement in the use of this permit is that the person responsible for the project must ensL, re that the work is in compliance with the above stated specifications and the conditions, and best m~nagement practices listed on the enclosure. Failure to satisfy these conditions invalidates the authorization and result in a violation of the Clean Water Act. Verification for the construction of an activity ~tnder this nationwide permit is valid for a period of no more than two years from the date of this letter, or a lesser time upon expiration of the nationwide permit on a regional or national basis. Continued confirmation that an activity complies with the terms and conditions and any changes to the nationwide permit is the responsibility of the pe~ittee. This permit should not be considered as an approval of the design features of any activity authorized or an implication that such construction is considered adequate for the purpose intended. It does not authorize any damage to private propertY, invasion of private rights, or shy infrir~ement of federal, state, or laws o~' regulations. Thank you for your interest in our nation's water resources. If you have any additional questions concernin~ ou~ regulatory pro,ram, you w~.w contact Mr. Victor Cole at the address above, telephone (817) 334-4623. SincerelF, District Engineer Enclosure Copies furnished: Mr. Rollin MacRae Texas Parks and Wildlife Dept. 4200 Smith School ~oad Austin, Texas 78744 Mr. David Curtis U.S. Fish and Wildlife Service Ecological Services 9A33 Fritz Ianham Building 819 Taylor St. Fort Worth, Texas 76102 Mr. Jerry Saup~-rs U.S. Enviro~ntal Protection Agency ~=gion VI 1445 Boss Avenue Dallas, Texas 75202 N&TIOI~WID2 P~I~qXT CONDITIONS ~R CaBTAIN ACTIVXTXES ~QU~X~ DaP~ O~ ~ ~ A~R~TION ~ foll~in~ s~ial ~itio~ ~t be foll~ in o~er for t~ natio~ide ~t(s) to be valid: (1) ~at ~ disc~ge of dr~ged or frill ~terial will not ~ in the prox~ftF of a p~lic water suppty int~e. (2) ~at ~ ~scharge of ~edg~ or fill ~terial will not ~ in a~ of . ~ncentrat~ s~llfish pr~uctfon ~le~m t~ disc~ge is dirtily relmt~ to a s~llfimh ~t~g activft~. j~p~dize a t~eat~ or end~ger~ s~es ~ (3) ~t the activity Mill not S~i~ Act (KSA),or d~t~Y or ~ve~se~Y ~ify ~he tdetift~ ruder tb Sn~ger~ ~itical ~itmt~of s~ s~i~. In t~ ~e of F~I agenci~, it is t~ ~enci~' r~ibil~ty to c~ly with t~ ~u~r~nts of t~ KSA. Iff the activity my adve~ely aff~t ~Y l~st~ sp~i~ or critic~ ~itat, the District Engineer ~t in~timte S~t~on 7 co~ultation in ~r~ with the ~A. In s~ ~es, the District Kngin~r my: (i) ~itiate S~tZon 7 consultation ~d t~n, u~n ~[et~on, authorize the activity ~der t~ natio~i~ ~it by adding, ~f ~propriate, uctivit~ sp~&fic ~nditio~, or (ii) prior to or con~t with S~tiou 7 co~ultation he my ~nd dimcretiou~ authority or ~e ~d~ffication, s~pension, or rev~utZon pr~- (4) ~t the mctivitF shall not mi~if~c~tly dis~t the ~v~t of those species of aq~tic ~fe tn~g~o~ to the ~te~y (~l~m the p~ p~ae of the fiZZ ~ to ~d ~ter). ~teriaX fr~ fr~ toxic ~llut~ts (s~ S~txoe ~'~ o~ ~ne.~te Water Act) ~n toxic (6) ~mt ~F mt~t~e or fill authoriz~ shall be pro.fly maintainS. a co neat of the NationaZ ~ild ~d Scenic (7) ~t the ~tivit~ will not oc~r [n ~ ........ --+.,~ r'ver" for River Syst~; nor in a river offici~lY d~i~at~ oy von~ess u - .... · t ~ssibte ~ncl~on ~ the s~t~, wh~le t~ r~ver is in ~ official s~y stat~. (8) Tht t~ activity shll not ca~e ~ ~eccept~le inte~erence Mith navigation. (9) ~t, if the activity My adversely aff~t historic pro~rt~ ~ich the National P~k Se~ice ~ l~st~ on, or dete~in~ eligible for listing on, the National Register of Historic Plac~ the pe~itt~ w~ll not~fy the District ~g~n~r. Xf the District Kni~n~r dete~Zn~ t~t s~ historic properties ny be adve~e[y aff~t~, b will p~v~de the Adv[so~ Co~cil on Historic p~e~at~on ~ op~rt~ity to ~t on t~ eff~ts on su~ historic properti~ or he will co~ider ~difi~t~ou, s~pe~, or*rev~t~on. F~the~re, tht, [f the ~mitt~ befo~ or d~inl pr~tion of the ~rk authorize, ~co~te~ a ~storic propert~ that h~ not b~n ~st~ or dete~in~ eligible fo~ t~stin~ on the National Register, but whi~ My be eligible for ~isting ~ the National Re~ister, he shall ~iately natiffy the Dbtric~ Kngin~r. (lO) ~at t~ correction or o~tion of the activity will not ~eir r~e~ tribal ~ights, incl~inf, but not X~it~ to, r~e~ ~ter ri~ts ~d treaty fishing ~d h~tinf ri~ts. (11) ~t in ~rtmin stat~, ~ ~divid~l orate ~ter q~iity certification ~t be obt~n~d or w~iv~. (12) That in certei~ stete~, ~ individ~l rotate ~tnl zone ~~t co~ist~Y (13) ~t the ~tivity ~1 ~ly with re{ional conditions w~ ~y have be~ edd~ by t~ Division ~n{~n~r. (14) ~at the m~t pr~t~ list~ bel~ s~l be foll~ to the m~ extent pr~cti~le. ~~ ~I~S ~~t p~im {~1 be follY, to t~ ~ ~t~t ~i~le. ~ order to min~ize t~ ~ve~e elf. s of thee dis~{~ ~ the ~tic ~vi~t. Fail~ to c~ly wi~ thee p~ti~ ~ be ca~e for ~ District ~{in~r to r~nd, or ~e Divisioe 2n{~r to t~e, disc~tion~ aut~r~ty to ~late the activity on ~ ~vi~ b~im or ~ b~ia. (1) D[sc~{~ or ~ or fill ~terial into ~te~ of t~ Ueit~ Stat~ s~ll be avoi4~ or ~iz~ ~o~ t~ ~e of other p~ctical (2) Dis~g~ in s~ing ~e~ d~i~ sp~fng se~o~ shell be avoid. (3) Dio-~-~ shll not ~t~ct or M the mv~t of 8~tic indif~o~ to tb ~te~ or tb ~o~e of noel or ~t~ ~ fl~ oF c8~e the relo~tion of the ~ter (~l~a ~ pr~ ~se of t~ fill is to ~d ~te~). (4) If the ~s~fe ~tu ~ ~o~t of ~ter, adve~e ~ects on the a~tic s~t~ ~ by t~ ~le~t~ ~o~e off ~ter ~or the ~triction of its fl~ shll be nin~iz~. (5) Dio~h-~fe ~ ~tl~ ~e~ shll be avoided. (6) Hea~ ~i~t ~rkinf in ~tln~ s~l be pla~ on mrs. (7) Dis~Z~ into b~inC ~-~ ~ m~.,,~ ~te~l shall be avoidS. (8) All t~ filb shll be r~v~ in t~ir ~tirety. ~ I~TION District Enfin~ ~e authoriz~ to dete~i~ if ~ ~tivity ~ with the te~ ~ con~ti~a of · natio~ ~it ~l~s ~et d~ioion ~t be ~e by the D~vis~on Snf~r. (2) Hatio~ide ~ts ~ not ~via~e t~ n~ to ~ta~ ot~r F~e~, state or ~o~1 euthorizati~ r~uir~ by 1~. (3) Netio~ide ~its ~ not ~t ~y pro~rty ri~ts or ~cl~ive privilege. (4) Nat~o~ide ~ito do not authorize uY inj~ to the p~rty or ri~t8 ot~. (5) Netio~ide ~ts ~ not ~thorize interf~ with ~y ~ist~f or F~e~l p~j~t. dp Jerry Parch~ Consulting Engineers October 14, 1988 Mr. Russell Doyle, P.E. City Engineer City of Coppell P O Box 478 Coppell, Texas 75019 214/462-0022 RE: JP No. 88009~ Flood Plain Reclamation Study~ Parks of Coppell; Coppell, Texas Dear Russell: on Friday, October 7, 1988 we provided two copies of a study entitled "Flood Plain Reclamation Study on Cottonwood Branch and Denton Creek for Construction of Parkway Boulevard and High School Access Road" to the City. Pursuant to our conversation on Wednesday and your letter of October 7, 1988, enclosed herewith ia the following additional information that you re~ues. 1. Another copy of the aforementioned study including Exhibits A and B. 2. Three copies of the creek cross sections as included in our original submittal that were utilized in the hydraulic analysis. 3. Three separate copies each of Exhibits A and B as included in the folder in the back of the study. In your letter of October 7, 1988, you state that the referenced study will be submitted to FEMA on Monday (i.e. October 100 1988). I inferred from your statements in the first two paragraphs that in the interests of expediting the project, the study was submitted to FEMA with no prior City review. Also in your letter you emphasize in the first two paragraphs that you have assumed that our study complies with all ordinances and requirements. I call assure you that as engineers for the project our primary concern is to provide a safe design that complies with all City, State and Federal requirements. Following is a brief history of our efforts to understand the City requirements regarding flood plain reclamation in the Parks of Coppell west of Denton Tap Road since our firm was engaged by ABQ Development Corporation to provide engineering services on this project. In addition, in response to your request to submit all information to you regarding the "Grandfathered" status of 6001 W'. Inlerslate 20, Suite 209, LB 32 · ^rlington, Texas 76016 · Metro (817J 572-3458 * 1817J 561-2108 Mr. Russell Doyle, P.E. JP No. 88009 October 14, 1988 Page 2 of 4 the Parks of Coppell west of Denton Tap Road, the following documentation is attached for your files and will be referenced in the following discussions. 1. Letter dated Hay 25, 1988 from Hr. H. Wayne Ginn, P.E., City Engineer of Coppell to Hr. Hike Allen of Univest Development Company with the following attachments: a. Letter dated April 4, 1988 from Mr. Allen to Hr. Ginn. b. Letter dated November 8, 1982 from Hichael Baker, Jr., Inc. to Hayor Andrew Brown, Jr. c. Letter dated September 24, 1987 from FEHA to Hayor Lou Duggan. d. Letter dated Hay 3, 1988 from FEHA to Hr. Ginn. 2. A copy of a letter I ~ent to Hr. Ginn dated June 8, 1988. 3. A copy of a letter I sent to Ms. Haryetta Cunningham of FEMA dated June 17, 1988. 4. A copy of a letter I sent to Mr. Carl Anderson, P.E., former flood plain engineer for the City of Coppell, dated June 17, 1988. 5. A copy of Mr. Ginn's response letter to my June 8, 1988 letter, dated June 21, 1988 with the following attachment: a. Ordinance No. 219 of the City of Coppell, effective June 24, 1980. On June 3, 1988 Mr. Jay Chester of ABQ and I met with Mr. Allen who provided us with the documentation listed under Item No. 1 above stating that the PCJV property is exempted from the provisions of the recently adopted Flood Plain Management Ordinance. It is my understanding that Mr. Ginn's letter of May 25, 1988 (Item No. l) and his signature at the bottom of Mr. Allen's letter of April 14, 1988, (Item No. l-a) confirm this exemption. Having been advised that the Parks of Coppell Property had been exempted from the October 1, 1987 Flood Plain Management Ordinance, I sent a letter to Mr. Ginn dated June ~B,. 198~ (Item .Hr. Russell Doyle, P.E. JP No. 88009 October 14, 1988 Page 3 of 4 No. 2) and requested that he provide me a letter stating the criteria under which the proposed reclamation project will be evaluated by the City. In the meantime, I requested the current effective flood plain modela of Denton Creek and Cottonwood Branch through the Parks of Coppell west of Denton Tap Road from,FEMA (Item No. 3). For reference purposes, I also requested copies of availsble flood plain models prepared by Mr. Carl Anderson of the City of Coppell in my letter to him of June 17, 1988 (Item No. 4}. However, understand that Mr. Anderson's models are not currently recoganized as effective base flood models by FEMA. I obtained Mr. Anderson's flood plain models in a meeting with him on June 22, 1988. Mr. Anderson prepared an extensive study of the City's flood plains including modelling of channel improvements, determination of peak flood discharges for multiple frequency events and determination of the 100-year flood plain with existing channel conditions. His studies did not include floodway computations or floodway modelling however, to the best of my knowledge. Mr. Ginn provided me a letter dated June 21, 1988, (Item No. responding to my request for direction on preparing the flood plain reclamation study. Since I had previously advised a staff member of Ginn's office that I had already contacted FEMA, the Corps of Engineers, Mr. Anderson, and several engineering firms with projecta in this area, for flood plain data, he felt it best that I obtain computer models of the flood plain from these sources. Regarding the criteria or ordinances that will be applied to evaluate our flood plain reclamation study by the City of Coppell, Mr. Ginn provided me a copy of the City of Coppell Ordinance No. 219 (Item No. 5-a). Section 5.3 of this ordinance is in accordance with FEMA regulations as stated in the National Flood Insurance Prqg[am and Related Regulations, Part 60, Subpart A, § 60.3. To my knowledge, other areas in the Parks of Coppell and in the Villages of Cottonwood Creek were reclaimed in compliance with this regulation. Our study has been prepared in compliance with [he provisions of Ordinanc~ No. 219, and Section 5.3 of this ordinance in particular, as directed by Mr. Ginn. In addition to the correspondsnce and discussions described above, I have had numerous meetings with other engineers who have prepared studies for projects in this area including Vista Ridge, Century Park, Parks of Coppell, and Villages of Cottonwood Creek, as well as with Mr. Anderson on a study he prepared for some proposed grading work in the City Park. Dewberry and Davis could not provide us current comprehensive effective hydraulic models ,Mr. Russell Doyle, P.E. JP No. 88009 October 14, 1988 Page 4 of 4 of Denton Creek and Cottonwood Branch due to the various states of review and approval of the many recent projects in this area. As I discussed with Mr. Chris Ulsch of Dewberry end Davis, we have prepared flood plain models of Denton Creek and Cottonwood Branch based on our compilation of the existing computer models prepared for the individual projects that have now been completed in this area. information and attachments presented herein I trust that the request for ,,grandfathered" documentation and have satisfied your have provided you additional information to evaluate our study. We appreciate your continued cooperation in asisting us in obtaining necessary City approvals and a Conditional Letter of Map Revision from FEMA. If you need any further information or would like for me to meet with you and discuss these matters, please call. JP:ch cc: Mr. Jay Chester, p.E./ABQ Development Corporation Mr. Wayne Ginn, V.E./Ginn, Inc. PO, Box 47{:1 Coppell, Texas 75019 214 - 462 - O022 October 7, 1988 Mr. Jerry Parche Parche Consulting Engineers 6001W. Interstate 20 Suite {209, LB 32 Arlington, Texas 76016 RE: Floodplain Reclamation Study/Parkway Boulevard Dear Mr. Parche: I am in receipt of subject submittal, which we will hand carry to F.E.M.A. on Monday. I am operating on the assumption that the design submitted is in compliance with all current o___~rd__i~ance}, rules and regulations of the City of Coppell, inc____!lud_~ig-q the Floodplain Ordinance. in the interest of expediting the project, I am passing your submittal onto F.E.M.A., trusting that you have complied with all requirements. In the meantime, please submit three (3) sets of plans and drawings to this office so that we can review the development that your reclamation report represents. We will have the key members of the DRC review those and. if necessary, will ask for a meeting to discuss this matter. (It does appear that you omitted sealing your study). As discussed in detail with you on Tuesday with the DRC, all "grandfathered" documentation shall be submitted to me for consideration of complying with that commitment. Your cooperation and continued assistance in this matter is greatly appreciated. Thank you. ~/City Engineer t",, :. -'-- I 'J L:. OCT I 7 1988 RRD/lsg Alan Ratliff, City Manager Wayne Ginn, Ginn, Inc. Steve Goram, Director of Public Works Shohre Paneshmand, Civil Engineer Taryon Bowman, P&Z Coordinator Jay Chester, ABQ Development 003 Federal Emergency Management Agency Wi, hinge.n.D.C. 20472 SEP 24 t(: l '" CI~TZFZB~ MAX~- Tho Ben.table Leu Dug,tn Hayer of the City of Copp011 P.O. Box 470 Coppe11, Texal 75019 Dear Hayer Duggen~ ~-~U~-~.~ (102) Cnll~nityt City of Copimll, Denton Crusty, 14~p panel llumbegl 400170 0005 C ~fective Deco of thai RevlliOn~ Septimber 24, 191 This Is in reference tea letter data--nd,technical. data eubeitted by )4~. Shohre Daneohaand, C~t~i~l-~4&ne~r~°r cna City ox Coppell, regarding the Flood Insurenc~ Study (FIS) for yo~r cemnunity. In her letter, aa, Denemhaand requested that the Federal kergen~y IMnngement Agency and floodplain eodification, along Denton cra.x.. _~_e..su~,~- .... _ .......... to pr.cee, thio request wre received u or aune :,tm, ~- · ? It should bi noted that a LOIqA Il lilued only to remove the Opecial Hazard Area (SFHA) designation, eh. un on the effective Flood Imsurance Map (FxIu4), fro~ aa ares occupied by 'a particular attune"re if It is above ~ne ~i../.; and Fl..dray Map (FBFM) La beLmJ is.ned in lio. u.o[. &_b..~.e~__o__~;_~-~lo~ Denton /~J~/~ ......... -~ 100- and SOO-year fioo~p.axn aelxnos~a~-- .? ___ ,,,- / to revxsa cae .r.nw mm .......... t4 ...... acer. ueed in the effective rAH, Creek baaed on clean, el zn T. ne nyugmu&&~ FZPJ4, and FBFI~ for your cfl'munity* #e have raviared the eutmitted data that wra prepared by Threedglll-DoudoY · ~sociatas ~lch included the foil.wirier HBC-2 hydraulic Bed. ling of pre- .... i~ dated 8eutember 12, 1986, representing cae i~vj-- .... -~ ....... . ' ........... · .... A3t a~ SO.year (~ne B) fldpzi~M aLo~ ~nton Ctld hive Mtn rivLl~ for i dLl~ncl of IpFOUllU~l s *- .... panel 0005 ~ ~o FXS toxk, ~1~ of ~ch are ~t~ F~ary 1Se 1984. cha~eo are o~ on ~e encl~ fl~ profile ohootos T~Io 2, entitled 'FlYway D8~'I a~otet~ ~rtAon of FX~ ~ 000~ Cj a~ a~otat~ ~rtion of FBF~ ~nol 00~. plo.au Mtn ~8t ~o 1~o~ of ~e ~nton ~o~ cron .ectto~ B n~ C have ~on tho oncL~e. · Andbroon En~j£neers, Inc., Is currently rastudyin~ several streams ~tthin the Cit~ of Cop~ll, lnclud~ ~nton ~reekf ~e analy0eo for ~e o~e~o are ~ ~ o~At~ ~ r~ Jy your c~m~ty for ~r reviev. ~e analyses ~11 ~en ~ u0~ as ~e ~oAo for · revLsLon M Cop~ll'o elS, a~ FBF~. ~Ao ~ will ~ outraged by ~e ravaged FIS, FI~, m~ F~ bao~ on ~e ~eroon ~gAneers analyses. P~lic notif~cmtAoa of ~io L~ ~AI1 ~ given in ~e CAtlzeng ~v~ate on or a~t ~to~r 9, 1987, a~ ~to~r 16, 1987. A copy of ~io notlf~catAon enclose. Zn ~dltlon, not,ce of chsngeo'v~l~ ~ p~Z~oh~ in ~e Re~loteF. .e onc~roge you ~ supplement this flotificition by prepmrt~ ertLcle for p~llcation In the c~a~L~y no~r. ~Lo trtlcio o~uld g~ve ~n providing data 8~ ~nterpret~ng the It should ~ not~ ~at HotLona~ f~ instance Pr~r~ r~u~atLon 44 CFR 60.3(b)(?) r~u~rea c~m~t~ea ~ "8oo~e ~,t ~0 f~o~ carrying clplc~ty w~n ~e m~ter~ or re~ocet~ ~rt~on of any vetorc~rae ~o management r~ulmttonoj co~uontly, reo~tXtty for Mtntenmnce of ~o m~tft~ chapel rests wt~ your cms~ity. Tho rovt8~ BFK8 mrs effective ms of ~m data of ~is liter/ ho~ver, 90 days of ~e oeco~ p~ltcation tn ~o Citizens Mysore, m clean My r~ot ~at F~ reconsider ~o dmtomtnitton ~o by ~tm ~. ~y for reco~tdermtton must ~ ~oM on sctenttf&c or to~ntcat ~ta. tnterest~ ~rtto* mrs on notice ~at ~ttt ~e OO~ay ~rt~ mXmpmmm, deracination ~ ~tfy ~t BFEo ~ooont~ tn ~ts L~ My A~oXf ~ ~tftM. 8trice ~tm L~ ~XX not ~ ~tnt~ aM dtttrtbutM ~ ummrm m~h mm Mo onc~rmgm you ~ dtmoomtnato wtdoXy ~roughout ~t c~tty ~e tton rogXect~ by ~to ~ tn order ~at intereo~ ~oM ~Y offer ~w t~o~atton or T~e determination made tn this LOiS has bean made pursuant to ~ctton 2~6 of ~ ~e National fl~ instance Act of 1968, il moM. (Title aA ouot~ aM Ur~n ~volopment Act o~ 1968, P.L. 9~448), 42 U.8.C. 4001-4128, ~ 44 C~ Part 6S. ~ r~utr~ by ~tm legislation, I c~Aty must ~opt  / a~ e~orce rXo~pXatn Mnagemen~ r~uX~ttono tn order M emro ~nttm~ eXtgtbiXtty M ~rttct~te tn ~e Hattonat FX~ X~anee Pr~rm. ~erefore, f Co XX must e~orce ~eee k~uXattoM uet~, at a ~nimM, ~e ~ ~vitto~ a~ eone designations tn the SFas as I~ ~ y~r c~m Y t~ City o pP Mit '1 fiZZ, tnctudt~ ~o ~tfXcitto~ Mdt by ~to ~. ~ ~e map is Xtot~ ~ovo m~ aB me~ by ~ts letter viii ~ uo~ for itl flo~ instance ~llclea a~ renewals issued for your cmm~ity. 3 A Consultation Coordinltion Officer his been dss/gnlted ~o oseLst you vith any problems you lly hive concerning this bOHR. This officer viii be the pr/miry FBd~..contect for your Community, Iq cmn be relched at tho relieving Address8 Hr. Alton S. Roy, Acting Chief rDtA, #st#rd! & Technological #&zirds Division rodereI Regionsl Center 800 North Loop 288 Denton, Texis 76201 (817) 898-9127 Any quastiord usy be directed to your~¢onsultetion Coordination Officer. Sincerely, Chief, R~ok Studies Division redsrsl lnsursncs Administration cci ~s. Shohrs Deneshsand Mr. Art Mhitney, Roberts & Dovdey Hr. Carl V. Anderson, P.E., Anderson Engineers, Inc. GINN, INC. June 21t 1988 Mr. Jerry Parche', P.E. Jerry Parche' Consulting Engineers 6001 W. Interstate 20, Suite 209, LB 32 Arlington, Texas 76016 Re: CONSULTING ENGINEERS JUN 2 3 Jet~f p~,che G~u~l Denton Tap Road Improvements and the Parks of Coppell Dear Mr. Parche': This letter is in response to your letters of June 7 and 8, 1988 and questions raised in the meeting with ABQ Development on June 13, 1988. We will address the items in the June 7, 1988 letter first. The easements requested from Univest Development, some time ago, were for the purpose of establishing a temporary working area in which to complete the construction of the road improvements within the existing R.O.W.. The only exception to this is the slight encroachment of the property lines at the locations where the recessed storm water inlets occur. The storm water inlets will encroach the property line about a foot and a half, and therefore we feel it is better to secure an easement around the inlets now than waiting for future R.O.W~ or utility easement dedications. In the matter of the requested water line extensions, we agree that water mains or services must be extended to the west side of the road. However, the size of, location of, and developer participation in these extensions must be determined prior to adding them to the Denton Tap Road construction contract. We have enclosed blue line copies of sheets 13 through 17 of the paving plans for your use in laying out your proposed water mains or service extensions to serve the ABQ property. According to the subdivision ordinance, ABQ will be responsible for the entire cost of these extensions, but under the prorata provisions of the ordinance some reimbursement may be available if these extensions are mains which will serve adjacent properties. In our discussions with Mike Allen regarding the median openings and left turn lanes, we agreed to show these as ,'future" with the exception of the proposed opening at Mills Lane. We stated that we had no objection to the locations of the left turn lanes and median openings shown on the attached ,,Median-Left Turn Sketch" dated 5-88, by Roberts & Dowdey CiVil Engineers, as long .as property owners on both sides of the road agreed on the locations. We cannot include the construction of these facilities in the Denton Tap Road Improvements unless the I?10.'1P~csto, Road · ?mite 1(16 · I.B I IR · l)altas, Texss 75248 · Phone 214/24R.-4qO0 property owners escrow the cost of them with the City in advance of construction. Also discussed was the improvement of Mills Lane by the adjacent property owners. The Mills Lane intersection can be revised to conform to the future layout of Mills Lane to the west if the property owners will coordinate their efforts with us and give us the surveyed location and design layout Of proposed Mills Lane. The 'same applies to the west side of the Parkway Blvd. intersection. It is our understanding that you are currently preparing the Parkway Blvd. layout on the west side of the intersection as we discussed so that we may include the entire intersection in the project. In response to the requests in your letter of June 8, 1988 concerning the floodplain issues associated with the properties recently acquired by ABQ we understand by our telephone conversation of yesterday that you have already begun addressing the concerns you had regarding the appropriate hydrologic and hydraulic modeling in paragraph A of your letter. In that regard, we will stipulate that you use the modeling which has been accepted by FEMA, but that you must also use your best professional Judgment in considering other data which is more recent and/or more conservative than that currently in use. Regarding the hydraulic design requirements for the bridge structure on Parkway Blvd. at Cottonwood Branch, the discharges analyzed shall be those that are customarily analyzed for projects of this type. The freeboard requirements shall be such that a two (2) foot clearance be maintained between the proposed base flood elevation and the low chord of the bridge structure. The determination of allowable flow velocities will be based on your best professional Judgment considering the flow conditions and soil conditions, and any concerns expressed by FEMA in their review of your proposed floodplain reclamation models. Items C and D of your letter shall be addressed by Ordinance No. 219, a copy of which is attached. For the interim period until the new City Engineer comes on board and assumes the duties of Floodplain Administrator, the acting City Engineer/Floodplain Administrator, H. Wayne Glnn, P.E., shall receive your submittals and coordinate the reviews mentioned in item E of your June 8, 1988 letter. In response to your request of June 13, 1988 we are also enclosing a blue line copy of the Bid Tabulation and the R.O.W. Map for the project.. I trust that the above information satisfactorily addresses your questions. sicr ~, ~ H. Wa~e Gifln, P. · JCK/HWG/dsp Alan D. Ratliff John C. Karlsruher, P.E. File J-379, 241-044 Jerry Parch Consulting Engineers June 17, 1988 Ms. Maryetta Cunningham Federal Emergency Management Agency 800 N. Loop 288 Denton, Texas 76201-3698 817/898-9284 RE: JP No. 88009; Flood Plain Analysis, Parks of Coppell; Denton Creek and Cottonwood Branch; Coppell, Texas Dear Ms. Cunningham: Our firm is serving as engineering consultants to ABQ Development Corporation of Albuquerque, New Mexico on property they have recently purchased in Coppell, Texas. Portions of the property lie in the flood plains of Denton Creek and Cottonwood Branch. Pursuant to my telephone conversation with Mr. Chris Ulsh of Dewberry and Davis, Inc. (Phone No. 703/849-0374) on June 16, 1988 and in order to proceed with preparation of development plans for this site in accordance with FEMA requirements, I request that the Federal Emergency Management Agency provide us with the following information. 1. Existing and most current hydraulic models including output data, of the 10, 50, 100 and 500 year flood plains and the 100-year floodway on Denton Creek from the confluence with Cottonwood Branch upstream to Grapevine Lake. The models furnished to us should contain discharges, and water surface elevations that FEMA will utilize to evaluate any proposed flood plain modifications in this reach. It is my understanding that a portion of the analysis of Denton Creek in this reach is in the City of Lewisville Flood Insurance Study. 2. Existing and most current hydraulic models, including output data, of the 10, 50, 100 and 500-year flood plains and the 100-year floodway in Cottonwood Branch from the confluence with Denton Creek upstream to Bethel Road. The models furnished to us should contain discharges and water surface elevations that FEMA will utilize to evaluate any proposed flood plain modifications in this reach. 6001 W. Interstate 20. Suite 209, LB 32 · Arlington. Texas 76016 ,, Metro [817) 572-3458 · (817} 561-2108 Ms. Haryett& Cunningham June 17, 1988 JP No. 88009 Page 2 of 2 3. Work maps showing cross section locations and alignments utilized in the hydraulic models, stream stationing and 100- year flood plain and floodway limits, and 500-year flood plain limits within the reaches of Cottonwood Branch and Denton Creek previously described. Thank you for your prompt attention to this matter. If you have any questions, please call. Sincerely/~ JP:ch cc: Mr. Jay Chester, P.E./ABQ Development Corporation dP Jerry Parch Consulting Engineers June 17, 1988 Mr. Carl Anderson, P.E. Kimley Horn & Associates, Inc. 12660 Coit Road, Suite 200 Dallas, Texas 75251 JP No. 88009; Flood Plain Analysis~ Parks of Coppell; Coppell, Texas Dear Carl: Pursuant to our telephone conversations of yesterday and today, please prepare for our uae the following information regarding your hydraulic modelling of Denton Creek and Cottonwood Branch developed for the City of Coppe11. 1. Hydraulic model and output data of the existing watershed and stream conditions of Denton Creek and Cottonwood Branch for all frequency floods you have analyzed. The models should cover Denton Creek from the confluence with Cottonwood Branch upstream to Grapevine Lake Dam and Cottonwood Branch from the confluence with Denton Creek upstream to Bethel Road. 2. Copies of maps showing stream cross section locations within the previously described reaches. Also please indicate a reference station on each cross section on Denton Creek between the Cottonwood Branch confluence and Coppell Road and on each cross section on Cottonwood Branch between Denton Tap Road and Coppell Road. 3. Any floodway analysis you prepared in the previously described reaches of each stream. 4. Maps showing limits of the 100-year and 500-year flood plains and the 100-year floodway, if available, within the previously described reaches of each stream. Please do not prepare any new information pursuant to this request. We are interested in obtaining copies of information listed above aa it is currently available. I would appreciate paper copies of all input and output hydraulic models and maps aa well as copies of the computer models on floppy diskettes. 6001 ~'. Interstate 20, Suite 209, LB 32 · Arlington, Texas 76016 · Metro f817l 572-3458 · (817) 561.2108 Mr. carl Anderson, P.E. June 17, 1988 JP No. 88009 Page 2 of 2 Please provide additional information in excess of that listed above if doing so will require less effort than trying to minimize the information prepared to only that requested. Also please advise me in advance if your fee for services under this request will exceed $300.00. Thank you for your prompt attention to this matter. I will come by your office on Wednesday, June 22, 1988 at 2:00 P.M. to pick up this information and review it with you. Sincerely7 JP:ch cc: Mr. Jay Chester, P.E./ABQ Development Corporation "dP Jerry Parch& Consulting Engineers June 8, 1988 Mr. Wayne Ginn, P.E. Flood Plain Administrator City of Coppell 17103 Preston Road, Suite 100 Dallas, Texas 75248 214/248-4900 Re: JP No. 88009; Parks of Coppelll Floodplain Regulations; Coppell, Texas Dear Wayne: On Thursday, June 2, 1988, Mr. Jay Chester of ABQ Development and ! met with Hr. Mike Allen of Univest Development Company to discuss several issues related to the future development of the property recently acquired by ABQ in Coppell. This letter is provided to inform you of our discussions with Hr. Allen regarding flood plain regulations of the City applicable to this property and to request additional clarification of the criteria that will be used to evaluate any proposed flood plain modifications within ABQ property west of Denton Tap Road in order that we may prepare our studies in compliance with the requirements of the City. It is my understanding that the property purchased by ABQ Development south of Cottonwood Creek and east of Denton Tap Road, which essentially consists of the Univest property in this area excluding the "Town Center" Tract, or Tract 7, as it is commonly referred to, has been previously reclaimed from the flood plain. Official notification of this is documented in a letter from the Federal Emergency Management Agency to Mayor bou Duggan of the City of Coppell dated September 24, 1987. Mr. Allen provided us with a copy of this letter. We did not receive a copy of the enclosures however. Mr. Allen also provided us a copy of a letter dated April 14, 1988 from him to you requesting exemption of the unreclaimed portions of the PCJV property from the provisions of the City's recently adopted Flood Plain Hanagement Ordinance. This exemption is pursuant to Section A of Article 3 of this ordinance. By evidence of your signature at the bottom of Mr. Allen's letter, it is our understanding that the City of Coppell has Agreed and Confirmed this exemption. Mr. Allen also provided US a copy of your letter to him dated May 25, 1988, transmitting er dated May 3, 1988 from FEHA, which, according to your ~ lett ..... ~_ ,~.. ~e con-ell authority to interpretate its I ' sin Ordinance without ~eopardizin~ zts status zn the Flood PI 6001W. interstate20, Suite209, LB32e Arlington, lexasT~16e Metro(817) 572-3458-~8171561-2108 Mr. Wayne Ginn, P.E. JP No. 88009 June 8, 1988 Page 2 of 3 flood insurance program. Since the proposed flood plain modifications will not be evaluated under provisions of the October 16, 1987 Flood Plain Management Ordinance, I request .that you provide a letter to me stating the criteria under which the proposed reclamation and other proposed construction in the flood plain within the exempted property will be evaluated. More specific&lly we request the following: A. A copy of the HEC II model(s) and output data of Cottonwood Creek and Denton Creek from the downstream side of the Denton Tap Road bridges through ABQ property, and extending upsteam of the ABQ property west of Denton Tap Road. The information should include discharges of multiple frequency floods to be used in our modelling of the proposed improvements and include 100-year flood plain and floodway elevations, as well as 500-year flood elevations, to be used by the City and FEMA in evaluating the hydraulic response of the modified flood plain. I understand that several studies have been done on the subject stream reaches including a study by Carter & Burgess in 1982, Threadgill-Dowdey in June, 1987 and Anderson Engineers, Inc. in 1987. By this request, I would like you to clarify for us the hydraulic model that provides the proper base flood conditions that will be used by the City and FEMA to evaluate the proposed flood plain modifications. B. Please inform us of the hydraulic design requirements of the proposed Parkway Boulevard Structure over Cottonwood Creek. This should include discharges to be analyzed, freeboard requirements, velocity requirements, or other hydraulic design criteria, if any. C. Since the criteria for evaluation of flood plain modifications stated in the October, 1987 ordinance will not be applied to this project by the City, please inform us of any ordinance or other published criteria that will be applicable. If the project will be evaluated solely on the basis of FEMA criteria, please advise. D. Please inform us of the city requirements regarding minimum finished floor elevations of proposed structures in areas adjacent to flood plain areas, if any. E. Please advise us of the name of the staff member of either the city or your of Zice to whom we should direct our submittals and will coordinate with us in reviewing our project. M~. Wayne Ginn, P.E. JP No. 88009 June 8, 1988 Page 3 of 3 Thank you for your cooperation and assistance in this matter. We would appreciate your written response to the requests stated herein, so that we may have this documentation in our files, by June 17, 1988. If you have any questions or if you are not in agreement with the understandings stated herein, or wish to discuss these topics further, please call. Sincerely,~ JP:ch cc: ~r. Jay Chester/AB~ Development May 25, 1988 MAY 3 I 1988 P.O. Box 478 Coppell. Texas 75019 214-462-0022 Mr. Mike Allen Univest Development Co. 12770 Coit Rd., Suite 1215 Dallas, TX 75251 Re: Parks of Coppell Floodplain Reclamation Dear Mike: We have researched and made numerous contacts with FEMA regarding your request of March 24, 1988 (revised April 14, 1988) for exemption under the provisions of the Floodplain ordinance. The attached letter from FEMA, dated May 3, 198~, allows the City of coppell the interpretativ? ~uthor~ty without jeopardizing the Flood Insurance Program. ~ The confirmation of your letter is-based upon thi~ information by FEMA and your attached supporting ~cum~nts. We appreciate your patience in this matter. sincerely, H. Wayne ~inn, P.E. City Engineer HWG/dsp cc: Alan D. Ratliff Larry Jackson Dan Dowdey Shohre Daneshmand NTII Mr. Il. Wayne Ginn, P. E. City Engineer City of Coppell , Ginn, Incorporated 17103 Preston Road, Suite 100 LB Dallas, Texas 75248 Dear Mr. ~inn: Federal E, rnergcncy Management Agency ltcgion Vi, Federal Center, 800 lqor~h Loop 288 Denton, Texas 76201-3698 This letter is written to you in your official capacity as City Engineer and Floodplain Administrator for the City of Coppell, and documents a meeting in our office on April 27, 1988, to discuss specifically the portion of Cottonwood Creek upstream of Denton Tap Road, known also as Parks of Coppell Joint Venture Il. Those in attendance were Maryetta Cunningham and Bill Kuno:of~.this office, Hr. Dan Dowdy and yofirself.'' The purpose of the meeting was to discuss that provision of the City's Floodplain Ordinance which allows exception to the mere stringent design criteria in cases where a "prior conditional approval from FEMA has been obtained prior Lo enactment of the ordinance." As explained in our previous letters dated March 30 and April ll, 1988, a thorough search of files in our office and by the engineering staff in Washington did not identify that a proposed floodplain medification for that portion of Cottonwood Creek had been submitted to FEHA or that any Conditional approval For a proposed project had been issued by FEHA. ur research did document and verify that a submittal was made Uowever, o h ic 1 data which June ~28, 1982, by Carter & Our~es~ of ~owed the"FEMA'~tudy ~nd maps to be in error tor that por~mn th which ~r Dowdy is concerned That submittal resulted in our Creek wi ' ' ..... 2 ..... '~-~ data and our issuance n and a royal of the submitted L~m~m evaluatio PP .......... ~- the Carter & Burgess ~of a preliminary and final map revision to lncurpomo~ _~~~i~tls the role of theCityofCo~Pr~.~r~e~l~eo~n~eS~ndf~F~e~;~ from the mere stringent design ,, · r such exception; i e , the obtaining of a conditional " ' r ~o enac~men~ u~ u.~ ~-~ · established fo . ~ ' ~ _. .~ ^~ainance If the City approval from FE)~ pr?? ........... ~tal of technical data and termines that the sunjec~ suum,~ . ~s~li~uance by FE,~A of a preliminary/final map revision for that Mr. II. Wayne Ginn, P. E. portion of Cottonwood Creek constitutes a "prior Conditional approval from FEt4A", then the City could justifiably allow the exception to the property owner. ! must emphasize, however, that this is an interpretative decision Lo the ordinance which must ultimately be made by the City of Coppe)l rather than the Federal Emergency Management Agency. Should you need further assistance in this matter or in other concerns of the City's floodplain management program, please contact )lrs.t.Cunningham at the above address or by telephone at 817-898-9161. Sincerely, Alton S. Ray, P~/E., Cie Natural and Te~l~nological Uazards Division Copy to: Dan Dowdy Shorl~e Danesmand City of Coppell UNIVEST DEVELOPMENT COMPANY April 14, 1988 Mr. wayne Ginn Ginn, Incorporated 17103 Preston Road, Suite 100 Lock Box 118 ~llas, Texas 75248 City of Coppell ("City") Requirements for Floodplain ~eclamation - Parks of Coppell Dear Wayne: The Parks of Coppe]l Joint Venture II (#PC~V"), the owner of the Parks of Coppe]l property, is currently nego_ tiatinq a contract of sale on a portion of its ]and. The potential purchaser ("Purchaser") has requested certain assurances reGardinG the City's interpretation of its recently adopted Flood Plain Management Ordinance (the "Ordinance") as it relates to the modifications of the Flood~y Boundary and Flood~y Map (the "Flood~y Map") which w~re preliminarily approved Dy the Federal EmerGency Management A~ency ("FEMA") by letter to the City from Michael Baker, Jr.,~g' Inc., consultant to FEMA, on November 8, 1982, t .ogether with attachments thereto, (the "Preliminary Approval [~tter") copies of which have been supplied to your office. A coDY of the cover transmittal letter of the Preliminary Approval Letter is attached hereto. A_~ we have explained to you, the Preliminary Approval Letter was issued Dy FEHA on the entire Parks of Co~11 project,..both east and west of Denton Tap Road. Based upon the Preliminary Approval Letter, the majority of the flood fringe land in the Parks of Coppell which lies east of Denton Tap has t~en filled and reclaimed over the last 4 1/2 years in compliance with the Preliminary Approval Letter and, on September 24, 1987, FEMA issued its Letter of Map Amendment removing the reclaimed areas frc~ the flood plain {cover letter enclosed), thus recognizing the completion of work contemplated by the Preliminary Approval [stter. As to thc~e Darts of PCJV land which have not yet been reclai~d which lie west of Denton Tap, accc~panying Flood~y Map are identical toffhe flood on the later Febr~Jary, 1984 FE~ ~p and th%c~,t ~t~mDer, \ 12770 COlT RD ' SUITE 1215- DALLAS. TEXAS 75251 ' 2141233-5771 Mr. Wayne Ginn April 14, 1988 Page Two Based o~ the precedinq information and in order for PCJV and the Purchaser to be correctly informed of the City's requirements for those still unreclai~d portions of the PCJV property, ~ request that you, as City Eng_ineer and as City Floodplain Administrator, confirm that the City reco(3nizes that the issuance of the Preliminary Approval fetter, as later/"- confi[med by FEMA's issuance of final map revisions on February 15, 1984~, established the base flood elevations and required flood~y encroachment limits for the PC~V property; and that these existing FF/4A approvals exempt the PC~-V property frc~a the provisions of the Ordinance p~rsuant to Section A of Article 3 of the Ordinance so lon~ as the reclamation work is Derform~J in oomDliance with the Preliminar%/ Approval fetter. It is understood, however, that (]) proposed work which materially deviates from the Preliminary Approval . Letter is not exempted fr(m~ the Ordinance, and (2) any proposed work must comply with all requirements present or future of FEMA. If you are in agreement with the contents of this letter, please confirm the City's a~reement by executing this letter in the space provided below. Yours very truly, PARKS OF COPPELL JOINT VENTURE II / A(~EED AND CONFIRMED: GINN, I NCOP. PORATED ~4~,a/s jp Enclosures ~ate .- CERTIFIED HAIL RETURN RECEIPT REQUESTED MICHAEL BAKER, JR., INC. ENGINEERS AND SURVEYORS November 8, 1982 Honorable Andrew Brown, Jr. Mayor, City of Coppell . m P. O. Box 478 Coppeil, TX 75019 Dear Mayor Brown: As consultants to the Federal Emergency Management Agency and in response to a letter dated June 28, 1982 frcm Hr. James R. Eltum, [![, former City Administrator, regarding flood boundary adjustments in the cem, untty, we have evaluated the technical data and completed modifications to the Flood In- surance Rate Hap (FIRM) Flood 8oundary and Floodway Hap (FBFla), .and Flood Insurance Study (FIS). 'We are sending you two (2) copies of the preliminary, modified FIRM, FBFM, and FIS for your community. We request that you revlev the proposed modifications. if you have any cm~nents on the proposed modifications that might Justify modifying our results, please use one (1) copy of the enclosed maps to identify the area of concern and return it to us within twenty-one (21) calendar days fr~ra the date of this letter. If you should find no conflict with the maps, please return one copy of each map with a letter stating you have reviewed the accompanying material. If you have any questions concernitng the engineering aspects of the mps, please contact Hr. Ernest Lepore of this office to11 free at (800) 233-0556. Sincerely, H[CHAEL BAKER, JR., INC. #erner W Hiller ,m~ ~r°Ject ~'n'ge~, A ~ ..~./ .Enclosures cc: FEPA Oenton Regional Office Hr. R. 0eil Greer (w/a) ~,~ ~ I , .