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HomeMy WebLinkAboutSP-24-08 - Supplemental - 0870 Williston Road (27) SOUTH BURLINGTON WATER DEPARTMENT SBWD Technical Review Comments SP-24-08 870 Williston Rd (Doubletree). Date: February 23, 2024 Submitted by Jay Nadeau, SBWD Superintendent I have provided the following comments directly on the Proposed Conditions Utility Plan, Sheet C2.3. 1. The project shall be constructed, completed, maintained, and operated in accordance with the approved plans. No changes shall be made in the project without the written approval of the appropriate CWD Division. 2. When a pipe material is specifically noted on the approved project drawings, the contractor/developer shall not have the option of utilizing any other pipe material. 3. All Ductile Iron pipe, hydrant barrel, and fittings for new water lines and appurtenances shall be installed with V-Bio Enhanced Polyethylene Pipe encasement. See CWD Specifications for details. 4. Ductile iron pipe shall comply with AWWA C151/ANSI A21.51. Ductile iron pipe shall be minimum thickness class 52. PVC water pipe shall comply with AWWA C900 with minimum Pressure Class 235, DR18 5. Four-inch (4”) and six-inch (6”) DI pipe shall have no less than two (2) bronze wedges installed at each joint. Eight-inch (8”) and larger DI pipe shall have no less than three (3) bronze wedges installed at each pipe joint. 6. Anchor tees (aka: Hydrant tees and Swivel tees) shall be Class 350 ductile iron, cement lined, to AWWA/ANSI C110/A21.10, C111/A21.11, and C104/A21.4. In lieu of Anchor tees, conforming Mechanical Joint tees may be used if a Foster Adaptor is used to secure the valve directly to the branch of the tee. 7. Mechanical joint restraints shall be either EBAA Iron MegaLug, Ford Uniflange Series 1400, Romac RomaGrip, or approved equal. 8. Gate valves shall be Mueller, Kennedy, AFC, M&H or approved equal on water distribution mains and Mueller, AFC, or approved equal on CWD Transmission mains. 9. Gate valve boxes located in roadways or sidewalks shall have one non-adjustable paving riser of a height ranging from two-inches (2”) to four-inches (4”) as need to be brought to final pavement grade. 10. V-Bio polyethylene encasement is required for all ferrous material installations underground. This includes fittings for PVC and HDPE pipe. SOUTH BURLINGTON WATER DEPARTMENT 11. Cor-Blue T-bolts and nuts are required for underground installations. 12. Tracer wire and termination box specifications are required for all plastic pipe. 13. The SBWD shall be notified in advance to inspect all mechanical joint fittings, main line taps, appurtenances, thrust blocks, and water line crossings prior to occurrence of back filling. 14. Stainless steel tapping sleeves shall be TPS Triple Tap or approved equal. Tapping valves shall only be performed by CWD approved contractors. 15. Fire Hydrants shall be Kennedy K-81 D or Waterous Pacer and shall conform to AWWA C502. Note: Waterous Pacer hydrants shall be installed with a Boston Operating Nut. 16. 4” Storz pumper nozzle connections are required on hydrants. Spring loaded hydrant flags and Storz connections shall be installed before new lines are turned on by the Department. 17. Concrete thrust blocks shall be installed on caps, tees, hydrants and bends of 22.5 degrees and greater. Thrust blocks shall be used in conjunction with “Mega-Lug” restraining glands or approved equal. Poured in place thrust blocks shall be neatly formed with wooden side forms against undisturbed soil. 18. CWD continues to allow for “approved equal” products but they shall be reviewed by the appropriate CWD Division. 19. There is a significant amount of Asbestos Cement (AC) water pipe within the CWD owned and managed water systems. There are a number of regulations that affect work involving AC pipe. The Professional Engineer and Contractor shall be responsible for adhering to the “Vermont Regulations for Asbestos Control” for removal and disposal of AC pipe. Costs associated with any and all labor and materials to properly handle and dispose of existing AC pipe is the responsibility of the Contractor. 20. No water lines shall be installed after November 15 or before April 1 without prior approval of the appropriate CWD Division. The appropriate CWD Division may restrict work before November 15 and after April 1 during adverse weather conditions. CWD does not allow excavating water mains or service lines during the winter months except by special permission. 21. The applicant or project engineer shall be responsible for the submittal of test results to the appropriate CWD Division. Submittal of all test results shall be required prior to the water main being placed into service. 22. Record drawings, prepared by a VT licensed Professional Engineer shall be provided to the appropriate CWD Division in pdf. and Auto-CAD format. Drawings shall include ties to all gate valves and curb stops to sub-meter accuracy. SOUTH BURLINGTON WATER DEPARTMENT It is the responsibility of the contractor to be familiar with the CWD Specifications beyond what is included in this information. The Champlain Water District Specifications and Detail for the Installation of Water Lines and Appurtenances information can be found at www.champlainwater.org Plan Specific Comments: Sheet CH401 Details. All water related details must conform to the Champlain Water District Specifications and Detail for the Installation of Water Lines and Appurtenances. Sheet CH104- Site Utility Profiles, Water and Sewer. 1. There is an existing abandoned water main on the north side of Williston Road, parallel with the edge of road, that may be uncapped. This information is provided to inform the developer/engineer/contractor during any work planned along Williston Road including where the new pavers are proposed. 2. The proposed 10”x8” tapping sleeve shall comply with the CWD Specifications. 3. We suggest additional in-line valves be installed on the 10” existing water main to be able to isolate it in the event of an emergency. The valves could be placed on the west side at the proposed new tap location for the new addition, and the east side of the 4” DI water line, thus enabling the isolation of that section of existing water main between the proposed new building and existing building and still keep water supply to each building. Three valves at each location are suggested. Please contact the SBWD if you have any questions. 4. All the proposed work is being connected to existing, aged private water infrastructure. Condition assessments of the infrastructure where it becomes exposed should be performed to aid the engineer and owner in determining life expectancy and conditions prior to project completion.