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ST8201-CS 850605GINN, INC. June 5, 1985 CONSULTING ENGINEERS Honorable Lou Duggan P.O. Box 478 Coppell, ~X 75019 Re: Denton Tap Road/Sandy Lake Road Intersection Dear Mayor Duggan: At the April 23, 1985 City Council meeting, our firm was asked to examine the possibility of closing the above referenced inter- section during construction in order to expedite completion and save on construction costs. Enclosed please find letters from Mr. J. W. Bryan of Dallas County and Jack Ratche11, P.E., of Barton-Aschman Associates, our traffic consultants. In view of the reco~ndations of both letters we cannot advise closing the intersection for construction. In addition to the above objections, we would like to advise that the additional truck traffic on Coppe11~s streets due to such a closing might seriously undermine existing pavement. In addition to the maintenance costs involved, such an action could also give sufficient cause for voiding the one-year warranty period on recently completed streets. In the course of designing this project, our firm has attempted to plan for safely and efficiently moving traffic through the intersection during construction. Our drawings provide for a three-stage construction phase which is designed to keep two lanes of traffic open at all times, with a minimum of interrup- tion to construction operations, we would be glad to review our proposed sequence with you. In sumry, we strongly advise against closing the intersection as long as traffic can safely pass through the construction area. We, therefore, wish to proceed with the project as planned. Please feel free to contact me or Mr. John Wankum concerning the above. Sincerely, · #a~e Glnn, Enclosure cc: Steve Goram J. W. Bryan 16135 Preston Road · Suite 106 · Dallas, Texas 75248 · Phone 214/386-6611 r~ DALLAS COUNTY PUBLIC WORKS May 20, 1985 Mr. Wayne Ginn Ginn, Inc. 16135 Preston Road Suite 106 Dallas, Texas 75248 Re: Denton Tap-Sandy Lake Road Intersection Construction Dear Mr. Ginn: Reference our discussion with regard to the sequencing of construc- tion and detouring of traffic at the captioned intersection. Where suitable detours are not available, it has been our experience that at major intersections such as this a sequence of construction to construct the intersection in phases, with traffic detoured through the intersectio~ is possible. While the construction in this' manner does require longer construction time due to the detour- ing of traffic, curing time, etc., we find this is necessary where no convenient detour roads are available. Closure of this inter- section would require traffic to detour west to Coppell Road. It would appear that this would inconvenience a significant amount of traffic. We would be pleased to review the proposed sequence and detour ar- rangement and to provide you with our coaments and suggestions should you so desire. Sincerely, JWB :sg 161 Commerce Dallas, Texas 75209 749-8151 '-'f ECEIYED MAY Barton-Aschman Associates, Inc. 11551 Forest Central Drive, Suite 238 Dallas, Texas 75243 214-343-3891 May 3, 1985 Mr. H. Wayne Gir~, P.E. Ginn, Incorporated 16135 Presto~ Boad, Suite 112 Dallas, TX 75248 B~: Potential closing of Denton Tap/Sandy Lake intersectio~ Dear Wayne: I have reviewed the potential for closing of the Denton Tap/Sandy Lake intersection in Coppell for approximately three months to expedite reconstruction of the intersection. This review consisted of identifying and observing in the field potential detx;ur routes for Denton Tap and Sandy Lake traffic. It appears that the oaly potential detour route for Denton Tap traffic is along Bethel School ~oad to Moore Road to Parkway Boulevard. At the present time, these potential detour streets are two lanes wide with the em3eptio~ of Parkway B~levard which is being wi~ened to f~ur-lanes divi~. Also, Moore Boad will be wide~ed in the ~ear future, although it will only be two lanes divided. Coaosrni~g dev~talo~g the potentialdetour route, Bethel School ~ has houses that face and side onto it; Moore ~oad has houses and apartments that side onto it; and, Parkway Boulevard is presently being developed with~houses facing onto it. Denton Tap/Belt Line Road is a major north/south route that interchanges with I~JFreeway and SH 121. It not only serves as a major route in Cu~%~ll, but also is a~ajor route throu~hIrvi~ga~dserves a high volume of tripe to/fr~ the Te~as Instruments facility onSH 121 at Denton Tap. In the vicinity of Sandy Lake, Denton Tap has a traffic volume of approximately 8,000 vehiclesperday with a la~gen~beroftrucks. Due to the fact that the potential detour route (Bethel School-Moore- Parkway) has occupied homes along a go(x] portion of the route and the roadway sections aloag Bethel School ar~ Moore are narrow, it is my opinion that a detour route should not be established during construction of the Denton Tap/Sandy Lake intersection. The projected volume of traffic that would use this route would have an adverse impact on the homes that abut Bethel School and Moore Boads. xschman Asso/~tes, Inc. Mr. H. Wayne Ginn, P.E. May 3, 1985 Page 2 Since t~ere are ~ot any additional potential by-pass routes around the Denton Tap/Sandy Lake road intersection, it is our recommendation that it not be closed during oonstruction. ' Please do not hesitate to call if you have any questions or need additional information. Sincerely, ipal so : ate GINN, INC. CONSULTING ENGINEERS FROM: DATE: SUBJECT: Participants John Wankum June 5, 1985 Pre-construction Conference Denton Tap Road/Sandy Lake Road Intersection Coppell, Texas Participants~ John Wankum Randy Fleming Kevin Peiffer Glenn Fabian Harold C. Morgan Neil Estep A1 Wiegand Ginnv Inc. Ginn, Inc. Ginn, Inc. TP&L Dallas County Midwest Bridge, Contractor Midwest Bridge, Contractor Discussed coordination of County and Contractor efforts. Contractor will provide roadway excavation and subgrade for flex base and asphalt pavement at transitions to concrete pavement. County requires one week notice, minimum, to plan paving operations. Mike Sharp is foreman for County. Coor- dination between County and Contractor to be handled by Ginn, Inc. After discussion of traffic handling, Mr. Morgan left. Utility relocation: Contractor reminded of responsibility to arrange for relocation of utilities and to verify clear- z/Ices between proposed storm drain and existing utilities. Relocation of TP&L overhead lines necessary before completion of paving. Storm sewer and some paving can proceed prior to above relocation. Midwest Bridge will stake R/W prior to pole location. It was agreed that utility relocation should not restrict a notice to proceed in approximately two weeks. Coordination with gas and telephone companies will be a major concern for project completion. All utilities have received a set of project drawings. Verbal notice was given to Mr. Fabian for moving power poles. A one-month time frame was agreed to. Right-of-ways Individual owners have verbally agreed to right-of-way as shown on drawings and should be executing dedications soon. ! will confirm if a right-of-entry is possible during construction operations. (Mr. Fabian left.) The Contractor was asked to provide a list of suppliers, sub- contractors, superintendents, and emergency numbers. 16135 Preston Road · Suite 106 · Dallas, Texas 75248 · Phone 214/386-6611 The following contract provisions were reviewed= a. Contract time, 150 calendar days. $250/day liquidated damages. b. All construction administration by Ginn, Inc. c. Prior to beginning project: must have bonds, insurance, subcontractor list, emergency numbers, construction schedule. (Bonds were delivered by Mr. Estep.) d. Shop drawings required for 16~ inlet and junction box. e. Procedures for pay requests. 6. Horizontal and vertical control points were reviewed. 7. TSD 1982 standards are referenced specification book for project. City will pay testing concrete and compaction. Contractor will pay for re-testing. Terra-Mar will be probable choice for testing lab. Reviewed barricades and traffic handling. It was mentioned that a revision to traffic handling procedure (i.e., closing the intersection) is being studied. It was agreed that cur- rent plans are to proceed in accordance with-project drawings (Rev. 1). 10. Six sets of drawings reflecting CCO #1 have been received by Nidwest Bridge. Nodified specification books reflecting deleted items of work will be sent to Nidwest Bridge. 11. Mr. Fleming requested that culvert transition lengths be furnished by the manufacturer at changes in pipe size. Apparently this is no problem. 12. Some questions exist over City policy toward open cuts on City streets, particularly Sandy Lake Road. I will investigate. 13. Some miscellaneous construction details were discussed. Ne,ting adjourned at 12=03 p.m. cc; ~hn V. Wankum, P.E. Dean ¥oungblood Loc Duggan GTE Chris Chisholm Steve Goram Fred Harris, Lone Star Gas City of Dallas Water Dept.