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DR9306-CS 940504 reed engineering GEOTECHNICAL CONSULTANTS November 2[, [994 (:Revised) :PropoSal No. 5-3' City of Coppe11 Engineering Department P.O. Box 478 Coppell, Texas 75019 BOTEC. IC S VICB. PROPOSED BOX CULVERTB ~ PILOT CHANNEL BETHEL BCHOOL ROAD COPPELL, TEXAS Gentlemen: Submitted here is our proposal for providing geotechnical engineering services for the referenced project. This proposal is ba~ed on a site visit in April, 1994, and a plan provided to this office on November 14, 1994 by O'Brien Engineering. Project Description and Site Geology The project consists of two parallel 10x6 box culverts under Bethel School Road in Coppell, Texas. An approximate 300-foot long concrete-lined pilot channel is also proposed. Short (3-foot to 6- 1/2-foot) gravity gabion walls are proposed along the pilot channel. Based on experience in the area, site geology is a~ticipated to consist of terraced alluvial soils overlying weathered and unweathered shale of the Eagle Ford Formation. Fiel4 Investigation Considering the type of structures and anticipated site geology, it is recommended that subsurface conditions be evaluated by a total of four Sample borings. One boring will be drilled adjacent tothe proposed twin box culverts utilizing truck-mounted drilling equipment. The remaining three borings will be drilled along the proposed pilot channel using hand-operated drilling equipment. 2424 STUT-Z DRIVE · SUITE 400 · DALLAS, TEXAS 75235 · 214/35~5600 · (FAX) 214/3504)019 City of Coppe11 Proposal No. 5-3 May 4, 1994 November 21, 1994 (Revised) Page 2 Borings will be sampled continuously to a depth of six feet, and at maximum five-foot intervals thereafter. Samples of cohesive soils will be obtained using three-inch diameter pushed tubes. Cohesionless soils (sands and gravels) will be sampled and evaluated in-situ by use of the Standard Penetration Test (SPT). Borings will be bailed of drill fluids at the completion of field operations, and subsequent observations made in order to evaluate ground water conditions. Precautions will be taken during the field investigation to avoid damage to underground utilities and structures. However, Reed Engineering Group, Inc. will not be liable for damage to utilities or structures not identified on plans provided to us, or mislocated in the field by other parties. L~:~o~&tory ~nvsstigation Upon return to the laboratory, all samples will be visually classified by the project engineer or engineering geologist in accordance with the Unified Soil Classification System (USCS). Each sample of cohesive soil will be evaluated for consistency by use of a pocket penetrometer test. Selected samples will be subjected to classification tests and tests to determine strength characteristics. Anticipated classification tests consist of Atterberg Limits, moisture content, unit dry weight, and partial grain-size determinations. Strength and deformation will be evaluated by use of unconfined compression tests. Engineering Servioes The results of the field and laboratory investigations will be evaluated and presented with our recommendations in a bound report. The report will address, but not necessarily be limited to, the following: 1. description of the soil and ground water conditions as they relate to the performance and construction of the project; 2. foundation recommendations to include bearing, depth, constructibility, and magnitude of anticipated movement; 3. lateral loads on proposed retaining walls; and 4. general earthwork and testing recommendations. City of Coppell Propoe&l No. 5-3 May 4, 1994 November 21, 1994 (Revised) Page 3 Three copies of the report will be provided. Additional copies may be obtained for a nominal fee. Budget Costs associated with the proposed scope of services are itemizeU on the attached cost breakdown. Based on the breakdown, we anticipate the total cost of our services to be on the order of $2,400.00 to $2,600.00. In the event unanticipated subsurface conditions are encountered, you will be notified prior to our exceeding the maximum of $2,600.00. Unless prior arrangements are agreed to in writing, payment for our services are due within 30 calender days of the invoice date. Payments not received within 40 calender days of the invoice date will be charged interest at a rate of 1.0 % per month. AuthoE4 z&tion We appreciate the opportunity to present this proposal and look forward to working with you on the project. Authorization to proceed may be indicated by signing and returning one copy of this proposal to our office. If any questions arise, do not hesitate to call. Sincerely, V~ce Itc'es ident FWS/aap copies submitted: ~2) City of Coppell/Mr. Ken Griffin (1) O'Brien Engineering/Mr. Jim O'Brien City Manager City Engineer Signature Date Signature Date City of Coppell Proposal No. 5-3 May 4, 1994 November 21, 1994 (Revised) Page 4 COST ESTIMATE GEOTECHNXCAL SERVICES PROPOSED BOX CULVERTS AND PILOT CHANNEL BETHEL SCHOOL ROAD COPPELL, TEX~ Pield Xnvestigation Mobilization $ 150.00 25 Linear Feet, Drilling w/Truck-Mounted Rig 250.00 6 Hours, Drilling w/Hand Equipment 840.00 Subtotal, Field $1,240.00 Laboratory Services 8 Moisture Content and Unit Weight tests $ 96.00 5 Atterberg Limit tests 175.00 3 Partial Gradation determinations 75.00 4 Unconfined Compression tests 100.00 Subtotal, Laboratory $ 446.00 Engineering Services 2 Hours, Classification of Soil and Rock Samples - Project Engineer or Engineering Geologist $ 130.00 6 Hours, Analysis and Report Preparation - Project Engineer or Engineering Geologist 390.00 2 Hours, Analysis and Review - Principal Engineer 180.00 10 Hours, Typing and Drafting Support 300,00 Subtotal, Engineering $1,000.00 TOTAL ESTIMATED AMOUNT Based on the above quantities, the total cost for our services is estimated to be $2,400.00 to $2,600.00. Reed Engineering Group, Inc. reserves the right to vary quantities and types of services as the project requires. The upper limit budget will not, however, be exceeded without prior written authorization.