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Villas at LV-CS040603DEVELOPMENT REVIEW COMMITTEE ENGINEERING COMMENTS ITEM: PD-202~ Villas of Lake Vista, zoning change request from HC (Highway Commercial) to PD-202-TH-1 (Planned Development-202-Townhouse-1) to allow the construction of 157 townhome lots and 13 common areas on approximately 22 acres of property located south of Lake Vista Drive, east of MacArthur Blvd., at the request of Wakeland Property Company. STAFF REP.: Gary Sieb PROJECT ID# PD-04-0029 DRC DA TE: May 27, 2004 and June 3, 2004 CONTACT: Kenneth M. 972/304-3686 COMMENT STATUS: ,~ FINAL Also see comments under Preliminary Plat for this case. Site Plan - 1. No parking will be allowed within the right-of-way. All offstreet parking shall be on an HOA maintained lot. 2. Name the medians shown in the street at both entrances on Lake Vista Drive with the designation "Lot X", owned and maintained by the HOA. 3. The waterline needs to be adequately looped. There are several areas where the flow is through a single 8" waterline. 4. Explain the purpose of the 10' utility easement reservation along the rear of the site. Additional comments may be forthcoming during the full engineering review. NOTE: General Engineering Observations These comments do not constitute a detailed review of any Engineering submittals. Detailed review will be performed after approval by City Council. Site Plan 1. Verify that the proposed 8" waterline is adequate to serve the fire flow demand for the entire development. 2. Verify the location of the existing stub-outs you plan to tie into. 3. Install need to have a valve between the two connections on the 12" main on the west side of MacArthur Blvd. 4. Show fire hydrants on this site plan with appropriate spacing. 5. Verify the location and capacity of the stub-out for the sanitary sewer line. 6. The sewer line in all cases needs to end in a manhole rather than a clean-out. 7. Street light locations shown here are subject to review and approval by Oncor Electric/TXU. DEVELOPMENT REVIEW COMMITTEE ENGINEERING COMMENTS iTEM: Villas of Lake Vista~ Preliminary Plat, to allow the construction of 157 townhome lots and 13 common areas on approximately 22 acres of property located south of Lake Vista Drive, east of MacArthur Blvd., at the request of Dowdey, Anderson & Associates, Inc. STAFF REP.: Gary Sieb PROJECT ID# PP-04-0030 DRC DA TE: May 2 7, 2004 and June 3, 2004 CONTACT: Kenneth M. ~ Gri tn, P.E., Dir. o[En~ineerin~/Public }Forks 972/304-3686 COMMENT STATUS: ~ ,/FINAL ~ Preliminary Paving Plan - 1. Ensure all finish floor elevations are a minimum of 2 feet above the existing 100-year water surface or 1 foot above the ultimate water surface, whichever is higher. 2. All parking shown within public right-of-way needs to be located outside of ROW on adjacent HOA-owned and maintained property. 3. All access to and fi.om Lake Vista Drive needs to be coordinated with the City of Lewisville, as it is a Lewisville owned and maintained street. Preliminary Water & Sewer Plan Sheet- 1. We need easements to cover the sewer line and water line as it crosses through Lot 1X on the property. General Note - 1. Provide utility easements on all lots where water & sewer lines cross the lot. 2. Waterline needs to be sufficiently looped to provide continuous service in the event of an outage in any particular area. Preliminary Drainage Plan - 1. You need permission from City of Lewisville to tie into their storm sewer line in their street (Lake Vista Drive). Also, permission must be obtained to discharge surface flow into their street. 2. We need a letter for our file fi.om the City of Lewisville to the developer stating that permission is granted to use storm sewer lines and drain to the street, and to cut the street to access those storm sewer lines. Repair of Lake Vista Drive will need to be done in accordance with City of Lewisville standards. Additional comments may be forthcoming during the full engineering review. NOTE: General Engineering Observations These comments do not constitute a detailed review of any Engineering submittals. Detailed review will be performed after approval by City Council. Preliminary Paving Plan - 1. The visibility at the end of the alleys on the south side needs to be taken into consideration with the common area. 2. The alley section shown needs to have a minimum 6" lime stabilized subgrade beneath it. The paving section needs to be a minimum 6", not 4" as indicated. 3. Typical parking space is 9'x 19', not 9'x 18' as shown. 4. Build sidewalk adjacent to MacArthur and Lake Vista. Preliminary Water & Sewer Plan Sheet- 1. The 8" waterline may not be adequate to serve a property with this density as far as fire flow requirements are concerned. 2. Verify the existence of or put in a valve between the two feeds. General Note - 1. End the 8" sanitary sewer line in a manhole. 2. Verify the location and elevation of the water & sewer stub-outs to make sure they are able to serve the property. Preliminary Drainage Plan - 1. This plan should include a table of drainage areas.