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Food Lion-CS 901001 &Associates, Inc. I :::: . October ~, 1990 255 Parkway Boulevard ~v/~J~'G~-- Coppell, Texas 76019 Attn: Taryon Bo~an /0/8/9° Ms. Bo~an: ~: Fcc4 ~on, Ino. Prel~~Plat Enclosed are three (3) copies of the Preliminary Plat, Preliminary Utility Layout and Preliminary Drainage Plan. identical package has also been forwarded to Shohre Danes~and for review. These drawings, accompanied by this letter, will address all ~own co~ents made on the subject of the Preliminary Plat. Those items not specifically addressed on these Preliminary Drawings are as follows: 1. No cover sheet has been provided. 2. No "Construction Plans" have been provided. These are not submitted at this time due to the preliminary status of the plat. The Preliminary Drainage Plan has been prepared in accordance with the direction of Ms. Shohre Danes~and. We are prepared to s~mit Construction Doc~ents in accordance with City Criteria at the appropri~e time. _ . According to ~. Bill ~derson, ~he'drainageUstudy being prepared has been conceptually approved by, the City_of Coppell. We are in recei~-of a ~l~/Froflle layout depicting the'proposed offsite channel noted on our Preliminary Plat and Drainage Plan. This plan provides for a channel to be constructed from the northwest corner of the Food Lion tract to the southwest cgrner of Meadow Ridge - Phase I Addition (approximately 600 feet). The calculations for this channel indicate that it will provide capacity for the developed runoff from the entire Co~ercial Tract and a portion of the School Tract. The plan indicates a 42 or 48 inch diameter pipe outfalling at the northwest corner of the Food Lion Tract at an elevation of 477.9~. Preliminary Grading Schemes indicate a finished floor of 485! which will provide for a dock elevation of 480.5~. In order to provide sufficient cover for the outfall pipe, it will be necessary to fill the open area behind the truck dock area and outfall at a point slightly south of the property line as sho~ in the attached sketch. 12800 Hillcrest Rd., Suite 2~ Oallas, Texas 75~30 (214) 490-70~0 Fax (214) 490-7099 city of Coppell Taryon Bowman October 1, 1990 Page 2 The drainage system within the Food Lion Tract"will be designed to pickup off-site runoff from the area to the east. It is proposed to install pipe to the property lines in two locations. One pipe will provide for the developed runoff from the church and one pipe will provide for the developed runoff from the adjacent commercial property. All pipes are designed for the runoff from the 100 year storm. We hope this letter, coupled with the Preliminary Drainage Plan, will answer all of your questions concerning site drainage. If not, I will be happy to further explain this situation at the DRC on Thursday, October 4, 1990. If you have any questions please feel free to contact me. Sincerely, WINKELMANN & ASSOCIATES, INC. Michael D. Clark, P.E. DC/tbr ENCLOSURE Shohre Daneshmand - City of Coppell Bill Anderson - Dan Dowdey & Assoc. Rice Williams - ARTECH Design Group _ I'; ~ I-, / L, .,~.. ~' _ I PROJECT: ~---~T~F'~ L.. ~. r~ ~...J/dO~:~ '~~/PAWA.Winkelmann & A~lates, hic. 'DESIGNED BY: I'~ DATE: G1~172