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ST9302-CS 940119Memorandum January 19, 1994 CITY OF DALLAS Daniel Saldana / Steve Hardy / Randy Nelson Pipeline Design su~Ec~ Coppell - Meeting Minutes for Relocation of 30" Water Main in Sandy Lake Road Attached is a copy of the minutes for the January 6 meeting. Please proceed with the activities necessary to keep this project on schedule. Wholesale Services is meeting with representatives from Flower Mound, Lewisville, Coppell and Irving on January 19, 1994 to discuss the possibility of constructing their parallel main in advance of the paving. We will keep you informed of the status. Please call me if y~ have any questions. W. David Ryburn Manager Wholesale Services MINUTES MEETING OF JANUARY 6, 1994 Coppell - Relocation of 30" Water Transmission Main in Sandy Lake Road for Paving Improvements PREMISE A meeting was held on January 6, 1994 at Dallas City Hall Room 4AN with Coppell's City Engineer, Ken Griffin, and Engineering Consultants: Robert Maly, Manager; and Greg Saunders, Project Engineer; with Rady & Associates, Inc.; for a preliminary discussion of the design and construction process and requirements for the relocation of Dallas' 30' water transmission main in Sandy Lake in conjunction with the paving and drainage improvements on Sandy Lake Road from MacArthur Boulevard to Denton Tap Road. ATTENDEES Attendance list is attached. DISCUSSION Robert Maly described the project. The paving and drainage project is the City of Coppell's. The proposed street right-of-way is 100 to 110 feet wide. The project length is approximately 2 miles. Preliminary investigation has indicated that Dallas' 30' water transmission main will have to be relocated in at least two places encompassing approximately 15% of the project length. Engineering design for the relocation of the 30' water main has been included in Coppell's engineering contract for the paving and drainage improvements. Coppell intends to construct a new 24" water transmission main in the project for future use (also included in the engineering contract). State funds may be used to construct the paving and drainage improvements at the Sandy Lake Road and Moore Road intersection. Robert Maly related the current status and project schedule. The project is currently in the preliminary design phase. Final paving grades have not yet been established and the actual impacts of the paving grades on the existing 30' water transmission main cannot be determined. The initial design is scheduled to be completed in May 1994, for review in June 1994. The final design is to be completed by December 1994. Construction is to be advertised in January 1995, with initial construction of the water relocations to 'be completed in early 1995. Other paving and drainage improvement projects involving the 30' water transmission main were discussed as follows: MINUTES - MEETING OF JANUARY 6, 1994 Coppell - Relocation of 30" Water Transmission Main in Sandy Lake Road for Paving Improvements Page 2 Se Dallas County_ oavina of Sandy Lake Road from IH.35E to Me,Arthur Boulevard Randy Nelson is currently working on this project with the County. It is too early to tell if the 30' water main will have to be relocated; however, relocation is expected to be necessary. Paving of Denton Tap Road north of Sandy Lake Road This paving project is being designed by Albert Halff/and Associates. A preliminar, y, meeting to initiate the project has been held j between DWU's and Albert Halff s engineers. Randy Nelson is currently in tl~ process of reviewing . the 'depth of the 30' main. So far, approximately ,400' of the 30" main is expected to require relocation. / Previous paving of Denton Tap Road by City of C0ppall A section of the 30' main had to be relocated with this project. The relocation was designed such that the main would be shutdown for construction of the tie- ins only, with a time requirement of approximately 24 hours. During this time, Flower Mound's water supply from Dallas was maintained from Lewisville through the Valley Parkway emergency connection. Robert Maly related details regarding the relocation of the 30' water transmission main. A 2 to 3 month shutdown of the 30' water main is anticipated because, due to limited utility space in the street right-of-way, the 30' water main will have to be relocated at, or very close to, the existing pipeline alignment. In response to a question, DWU representatives advised Robert that Coppell's proposed 24' water transmission main cannot be located closer to the 30' water main than the width of the excavation required to repair the 30' water main (probably 10. feet). Robert noted that the 24' main is to be located approximately in the median (center) of the proposed roadway. Maintaining supply to the Town of Flower Mound was discussed. It was noted that the Lewisville emergency connection at Valley Parkway could possibly be used, but it was unknown if Lewisville could maintain supply for the extended period of time required. Previous use of the emergency connection had resulted in numerous broken pipes within Lewisville's system. Robert Maly noted that one of the options initially considered has been for supply to Flower Mound to be maintained by Coppell, and one option was to possibly use the proposed 24' main as a method to maintain supply around the relocation construction. It was agreed that additional consideration of this problem will be necessary when the extent of the relocation work has been determined. MINUTES - MEETING OF JANUARY 6, 1994 Coppell - Relocation of 30" Water Transmission Main in Sandy Lake Road for Paving Improvements Page 3 o The design and construction process for the relocation of the 30' water transmission main was discussed. DWU personnel related that normally DWU would do the design and construction to relocate the water main in advance of paving; however, DWU did not object to Rady & Associates doing the design as long as DWU specifications and appurtenances were followed and DWU had final inspection authority with the right to stop construction. It was agreed that a joint construction p__[oiect with the City of Co. ppell for the relocation of the 30' water main wou~cl be~ possible and probably advantageous to both Coppell and Dallas. ~;onstruction for the relocation of the 30' water main would be funded by Dallas. Elevations of the 30' water main had not yet been obtained beca'use the traffic on the street is heavy. It was agreed that DWU will review the 30' water main's depth and location related to the conceptual paving plan prepared by Rady & Associates. After the preliminary review by DWU, the best way to obtain elevations for the 30' water main (Dallas or Coppell Survey) will be determined. Randy Nelson expressed some concern that the relocation of the 30' water transmission main may not be.completed before demands increase in 1995. Robert Maly related that the construction will be delayed if it cannot be finished on time. It was noted that with limited space in the proposed roadway, DWU should consider combining construction of the future 30' parallel water main serving Lewisville and Flower Mound with the relocation of the 30' water main so that only one pipeline would have to be constructed in the roadway. Ken Griffin noted that the paving project could probably be delayed approximately a year if necessary for the construction of the new pipeline. TO BE RESOLVED Robert Maly will provide survey controls (BM's) and the concept plan to Wholesale Services for review by DWU engineering. DWU will request that survey data be obtained for the 30' water main; however, if it appears that Dallas survey work could delay the project, then DWU will advise Rady & Associates and the next step will be determined. Pipeline Design will review the concept plan for potential conflicts with the existing 30' water transmission main and advise Rady & Associates of the' results. At that time it will be determined who should do the design for the relocation.