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Devonshire 1-CS 911009 SHIMEK, JACOBS & FINKLEA :";' - 9 1991 CONSULTING ENGINEERS By: Engineering 8333 Douglas Avenue, #820 Dallas, Texas 75225 (214) 361-7900 ROSS L. JACOBS. P.E. I.C. FINKLEA, P.E. October 9, 1991 JAMES E. LAUGHLIN, P.E. RONALD V. CONWAY, P.E. JOHN W. BIRKHOFF, P.E. MATT ARMSTRONG, P.E. · ~ JOE R. CARTER, P.E. ~C: ~ ~'"~ GARY C. HENDRICKS, P.E. c. ,. S.,MFK. P.E. Lao, Ms. Shohre Danes~and, P.E. ~r~%~' ~ Engineering Department City of Coppell Post Office Box 478 Coppell, Texas 75019-0478 Re: Devonshire Estates Coppell Road Drainage and Sidewalk Dear Ms. Danesb~and: We have reviewed the const~ction plans for the Devonshire Estates Drainage Improvements and Sidewalk along Coppell Road prepared by Carter & Burgess, Inc. Our review co~ents are as follows: 1. It is our understanding that the Drainage Improvements and Sidewalk plan was proposed as an interim solution to providing pedestrian access from Devonshire to the new Coppell Elementary School i~ediately south of this addition. We offqr no objections to this plan in general. However, we do reco~end that this plan ~--~6~'~p[~'-~--'a-~-'ih-[~rim-'~-~i~ti0~-' 0hly 'and c~-~d'~Al-i-6n-'~-~'--'~-i~-e-~"-'[~-~-~'--d~p~%-i-i--k-6~B--"t© C[{y--"~Y'a~da'~ds both ~.~?~.~...6~..-~h~..-~3f~.~....~`[.~--~.d5~.~..~6~.~r{~..~s. ~0on as .... - ................................................................................. . ............. possible. 2. The typical section shows a railroad tie retaining wall 3.0 ft to 4'-6" in height. A detailed engineering design along with specifications is re~ired for any retaining wall in excess of 4 feet in height. 3. In our meeting at the project site on October 3, 1991, it was determined that the sidewalk and screening wall would be shifted approximately 4 feet east along Lot 1, Block B to acco~odate the existing storm drainage headwall at Halifax Drive. This plan should reflect that revision. 4. Shifting the screening wall and sidewalk approximately 4 feet east along Lot 1, Block B re~ires a sidewalk easement for the City of Coppell and a screening wall easement dedicated to the Homeowner's Association. These easements may be submitted as separate instr~ents. Ms. Shohre Daneshmand, P.E. City of Coppell October 9, 1991 Page No. 2 5. A landscape plan along the sidewalk was discussed during previous meetings with the Developer. It was our understanding that landscaping was to be required between the sidewalk and the drainage channel. These plans do not address landscaping. 6. The prints indicate that these plans have been modified to reflect construction records. This note is not appropriate at this time and should be removed from the plans. 7. The Developer should submit either the Engineer's construction estimate or the contract amount for the drainage channel and retaining wall work. The 2% construction inspection fee should be paid in full prior to beginning work on this project. We are enclosing a copy of a Draft Letter for your use in requesting payment of the construction inspection fee. We have discussed most of these issues with the Developer's Engineer and it is our understanding they are working to revise the plans. We recommend that the drainage channel and retaining wall plans not be approved for construction until the above listed comments are addressed. We are available to discuss this review at your convenience. Sincerely, Gary C. Hendricks, P.E. Enclosures cc: Mr. Ben dela Cruz w/Enclosures