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Mercantile-CS040518 T H E: C I T Y O F COPPELL May 18, 2004 Gregory K.Yancey Provident Company PO Box 1790 CoppellTX 75019 RE: Mercantile Addition, Phase 1 Dear Mr. Yancey: We are in receipt of your letter and survey of spot elevations on the south side of your building, and we have some concerns over existing site conditions. Our inspector visited the site yesterday, May 17th and observed that not only are the grades inconsistent with the as-built plans provided by Dowdey, Anderson & Associates, but the 12" HPDE storm drainage system that was designed to collect the roof drains does not appear to be in place. It is shown on the as-built plans, however, the roof drains empty directly into the courtyard. The volume of water being directed onto the adjacent property is significant. You will now be required to either engineer a way to collect the water and get it to the appropriate place, or go back and install the 12" HDPE storm sewer system. Also, a swale needs to be created within the landscaped area to direct the flow from the courtyard into your parking area and inlet as designed. Please have your engineer provide documentation on what is to be done to correct this situation. If the HDPE pipe is not constructed, the as-builts will need to be corrected to show the ultimate solution that was designed and constructed to direct water away from the adjacent property. If you have any questions or comments, please feel free to call me. Sincerely, Keith Marvin, P.E., Civil Engineer Office Phone: 972/304-7044 Fax: 972/304-3570 CC: Kenneth M. Griffin, P.E., Director of Engineering & Public Works Glenn Hollowell, P.E., Assistant Director of Public Works Greg Jones, Chief Building Official Bill Anderson, Do~vdey, Anderson & Associates Provident Company, Inc. REAL ESTATE SERVICES POST OFFICE BOX 1790 COPPELL, TEXAS 75019 TEL (214) 215-9400 FAX (903) 881-8594 EMAIL gyancey~cox-intemet.com May 10, 2004 Mr. Kenneth M. Griffin, P.E. Director of Engineering & Public Works City Of Coppell 255 Parkway Boulevard Coppell, Texas 75019 RE: The Mercantile / 878 S. Denton Tap Road / South Topography Dear Ken: The final grades for The Mercantile Phase One are different from those submitted to the City when we planned and permitted the project. Before we release the general contractor, we want to make sure the as-built grades do not adversely affect development of the tract south of the building. We want to do whatever the City desires to ensure that our project falls within whatever tolerances are permitted. The as-built topographic survey is attached for your review. If the site needs to be corrected, please let me know. I apologize for this situation and appreciate your time looking at the issue. Sincerely yours, Gr6g~ K. Yanc~y cc: Darryl Miller/Pacific Builders END 27" RCP ~," = 1+00.00 "CONNECT YYE INLET · 3+13.77 "A" END 21" RCP 10' CURB INLET TC 511.70 FL 21" 507.70 FL 12" 507.70 FL 2 5.oo' -- ~=38'12'56" --~---70.00 L=4-6.69 T=24,25 39'50'2B" R=IO0.O0 L=69.54 T=56.24- O 0,6~ FL & ,.33'08'17" R=100.00 L=57.84 T=29.75 PT,-'2+ 59.97 5' CURB INLET TC 512.00 FL 508.00 12" 511.00 1+00 ~O'L