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Vistas of C 1stP-CS 960201 DEVELOPMENT REVIEW COMMITTEE ENGINEERING COMMENTS ITEM: PD-149, Vistas of Coppell, zoning change from "HC" (Highway Commercial), "MF-2" (Multi-family 2), "LI (Light Industrial), and "C" (Commercial) to "PD-SF-7 and MF-2" (Planned Development, Single-family-7 and Multi-family-2), to allow the development of single-family and multi-family residential uses on 128.15 acres of land, located on the east side of Denton Tap Road, north of the Denton Creek, at the request of Carter & Burgess, Inc. DRC DA TE: January 25, 1996 and FebruaO' 1, 1996 CONTACT: Ken Griffin, P.E., Assistant CiO' Manager/CiO.' Engineer (304-3679) COMMENT STATUS: PRELIMINARY ./FINAL SUBSEQUENT 1. There is a concern about the traffic impact that these developments may have on the access road of S.H. 121 Bypass. Traffic signals may need to be provided to allow vehicles to exit the subdivisions. In addition, a traffic impact analysis should be provided to determine the impact on Denton Tap and MacArthur Blvd. by these developmems to determine if mitigation measures are required. Phase I 1. Information should be provided on the flood protection provided by the levee. The Coppell Floodplain Ordinance requires that the height of the levee be based on the standard project flood elevation, plus 3 feet of freeboard. 2. Any access to the state highway will also require TxDOT approval. Drainage Comment 1. Positive ove~:low will be required at all low point inlets. Phase H Preliminary Comments: 1. Permission will be required from Lone Star Gas to extend the street over their easement. Any access to thc state highway will also require TxDOT approval. 3. A 4' sidewalk in thc park area is inadequate for a trail system. 4. Need to provide information on the landscaping of the "round-about" in the landscaping plans. Page 2 PD-149, Vistas of Coppell Drainage Comments: 1. Erosion protection should be provided adjacent to Lot 17 Block D and Lot 18. Block J and adjacent to the street that fronts Lots 17-22. Block E. Phase II1 1. Any access to the state highway will also require TxDOT approval. Phase IV 1. Any access to the state highway will also require TxDOT approval. Phase V 1. Any access to the state highway will also require TxDOT approval. 2. _More than likely an3' controlled access to this site will be at Highland Drive or S.H. 121. Therefore. the City requests that you limit your access from Denton Tap Road and take all of your access off of Highway Drive or S.H. 121.