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ST8804-CS 881201dP Jerry Parch Consulting Engineers December 1, 1988 ~C.ii~%%~'~[h~ Ms. Taryon Bowman '~ ( Planning & Zoning Coordinator n ~ City of Coppell ~ P O Box 478 ~~ Coppell, Texas 75019 ~z~ 214/462-0022 ~"~ Dear Taryon: Enclosed are six prints of the Preliminary Plat of Heartz Road from Sandy Lake Road to Parkway Boulevard and two prints each of the Water and Sewer Plan, Drainage Plan, and the Conceptual Landscape Plan showing proposed faciliti~~~z Road Right-of-Way. Also enclosed is a copy 0~k~ ...... to Mr. Jay Chester of ABQ Development Corporation dated November 17, ~9.~. ~.~.~,~e results of a study prepared by our firm of ,i~~~ .... ~. ....... in the platted section of Heartz Road. An exhibit showing the sanitary sewer service area is attached with the aforementioned letter report. This letter and the enclosed drawings are submitted to the City in response to comments on the original submittal that were provided at the Development Review Committee meeti~ ~ii!~~- Following is a summary of the major issues' ~n~ '~s 1. West half of the proposed Ri~ht-of-Way for 621 feet north of Sandy Lake Road. The ~en~erline of Heartz Road north o~ Sandy Lake Road coincides with the east property line of the Town Center Site. Survey studies have determined that a strip of land of unknown ownership lies between the Parks of Coppell Joint Venture II property and the Ruth Perkins property north of Sandy Lake Road. This strip of land constitutes most of the remainin~ 30 feet of Ri~ht-of-Way required for Heartz Road in this area. The balance of the eastern half of the Ri~h~_f-Way between Sandy Lake and the ABQ propert~~'~'=-'~ 320 VVestway Place, Suite 501 · Arlington, Texas 76018 · Metro (817) 467-2418 · (817) 465-0259 Ms. Taryon Bowman December 1, 1988 JP No. 88009 Page 2 of 4 ABQ Development has requested the Coppell office of Ticor Title to research title to this strip of land north of Sandy Lake Road ~/~ ..... 'ch current ownership of the Perkins tract~ ~?~ 'i . report received from Ticor Title is attached to this letter. ABQ Development and the Parks of Coppell Joint Venture II (PCJV II) have committed financial resources to construct Heartz Road ~ ~ .... ~ ' · ~~~~ii~~ ........ lnce only ~~'~'o~'e roadway Right-of-Way is located within the ownership of either PCJV II or ABQ for 621 feet north of Sandy Lake Road, and ~!i~ no legal authorization has been secured t~truct any improveme~~~.of.~_~ the limits of PCJV II or ABQ property,~o construct only the west half of Heartz Ro~_r~ted in this area. ABQ and PCJV II ~ ~will provide~ry sewer, water and storm drainage "~facilities in the proposed half street section. In addition, if either the property owner or the City of Coppell will a~ree to pay for construction of the west half of~ the roadway adjacent to the Perkins tract ABQ ~_ ......................... ~ to design the full roadway section in this ar~V.~ 2. 209 feet centerline radius south of Parkway Boulevard Development Review Committee comments indicate that the Subdivision Ordinance requires a minimum radius of 425 feet for any street within the City. This mi imum ~3~ .... ~- . ~er, have centerlines ~'-w~--~ mus considerably less than 425 feet. ~'~ ~i~' ii ~is requested to permit a 209 foot centerline ~ Heartz Road south of Parkway Boulevard in ord~~ the roadway centerline may coincide with the property line between the PCJV II and ABQ properties. Technical justification for this request is based on the location of the radius in question and traffic flow in the proposed intersection. All traffic on proposed Heartz Road just south of Parkway Boulevard will be in a "Stopping" or "Acceleratin~ Condition". No through traffic will occur since Heartz Road will not be continued north of Parkway Boulevard. Therefore vehicle speed in the proposed 209 foot radius curve should be substantially Ms. Taryon Bowman December 1, 1988 JP No. 88009 Page 3 of 4 less than the design speed typically used for collector or even local streets since the location of this curve is at an intersection where traffic is required to come to a complete stop or execute a 90 degree turn upon entering or leaving the 209 foot radius curve. 3. Sanitary Sewer Capacity We have prepared an analysis of the sanitary sewer facilities in Heartz Road north of Sandy Lake Road in the Right-of-Way being platted. A copy of our letter report and exhibit showing the sanitary sewer service area is enclosed. The results of our study indicate that the capacity of the existing eight-inch sanitary sewer from approximately 1000 feet north of Sandy Lake Road to Parkway Boulevard is deficient with a fully developed service area. We have sized a parallel sewer pipe for this area such that the total capacity of both pipes exceeds the design loadings. Conceptual design of the parallel sanitary sewer facilities has been added to the Water and Sanitary Sewer Plan enclosed. Please review this study and advise us whether the parallel sewer facilities are acceptable as shown so that we may proceed with the final design. 4. Water Main Twelve-inch valves have been to the proposed water main at 600 feet interv hydrants have also been~at 300 foot maximum spacing. Compliance with other comments regarding required easements, construction details, brick pavers at Parkway Boulevard , etc. will be addressed in preparation of the Final Plat and construction plans. ~. ~. ...... ~ ~- ......................... - -T ~ i! also be addressed in th~~g-~'"~-~S'~ I trust that the information presented herein satisfys the concerns of the Development Review Committee and will permit the Preliminary Plat approval process to proceed. I~ is our understanding that this Preliminary Plat will be on the Planning & Zoning Commission agenda on December 15, 1988. Ms. Taryon Bowman December 1, 1988 JP No. 88009 Page 4 of 4 If you need any additional information, please call. Thank you. Sincerely,,.~  /rJerry Parche', P.E. ~P:ch Enclosures: Six copies of Heartz Road-Preliminary Plat As Revised Two copies Water and Sanitary Sewer Plan As Revised Two copies Drainage Plan As Revised Two Copies Conceptual Landscape Plan As Revised Copy of Sanitary Sewer Report & Exhibit Dated November 17, 1988 Copy of Letter from Ticor Tittle Dated November 8, 1988 w/attachments cc: Mr. Jay Chester, P.E./ABQ Development Corporation Mr. Mike Allen/Parks of Coppell Joint Venture II w/encl.