24-0023 SOW.pdf

General Description:

Scope of Work 24-0023

Restoration and Cleaning of Raw Water Lines

This project is to support the new water treatment plant, P1043, that is scheduled to be completed and operational in 2025. Line cleaning shall be completed prior to startup at the new water treatment plant. The purpose of line cleaning is to remove any sediment or buildup that has accumulated over time. There are two raw water distribution systems being cleaned: Hadnot Pt. and Holcomb Blvd. The raw water mains consist of lines that range from 8” to 36” in diameter. For basis of bid, total lengths of lines to be cleaned are approximately

27.5 miles for Hadnot Pt. and 10.4 miles for Holcomb Blvd.

Detailed Requirements:

1. The work shall be performed in two distinct phases; Phase 1 includes completion of line cleaning in its entirety of the Hadnot Pt. raw water distribution system; Phase 2 includes completion of line cleaning in its entirety of the Holcomb Blvd. raw water distribution system. Phase 1 work will be Base Bid with Phase 2 work a Bid Option. Provide 30 calendar days notice to Public Works Dept. before beginning Phase 2.

2. Prior to beginning work, contractor shall develop and submit a work plan for review and approval by

Public Works Dept. Government review period shall be 14 calendar days.

3. Install main line valves to isolate sections of raw water main to be cleaned while not interrupting water plant operation of bldg. 20 (Hadnot Pt. system) and/or bldg. 670 (Holcomb Blvd. system). Plant interruptions are not allowed during either phase.

4. Provide updated drawings of raw water piping to include all fittings, launch and retrieval locations.

5. Install pigging tees for installation of retrieval pigs.

6. Pipe materials consist of cast iron, C900, ductile iron, and asbestos cement. Intent is to not install tees or valves on AC pipes unless necessary. If deemed necessary or in the event additional AC pipe is uncovered, remove section of pipe and install tee, valves, and necessary fittings per the applicable Bid Item. Installing pigging tees or valves on AC pipe shall not be included in the Base Bid.

7. Contractor shall limit sediment from leaving disturbed areas. Install erosion control measures, as required. All voids shall be backfilled with suitable fill. Sod disturbed areas with centipede sod.

8. It is permissible to discharge only raw water at grade (not potable) in support of this work, provided that runoff does not cause flooding or erosion.

9. Both Hadnot Pt. and Holcomb Blvd. raw water distribution systems operate in a relatively low pressure environmental (avg. 20 PSI). Therefore, it may be necessary to supplement potable water during the cleaning process using available, nearby hydrants (avg. 60 PSI).

10. Public Works Dept. will be responsible for existing valve and well operations.

11. After cleaning raw water piping for both phases, contractor shall provide a C.C.T.V. submittal of lines on a CD.

Contractor must provide a plan with C.C.T.V. results that clearly labels water lines at the beginning/end of each video segment. C.C.T.V. files should be clearly named that correspond to provided plan. Government review period of this deliverable shall be 30 calendar days. C.C.T.V. scope will be a Bid Option.

12. Contractor is responsible for all locates. Any damage to existing utilities shall be repaired at the Contractor’s expense.

13. Contractor shall provide all material, labor, equipment, and supervision required to accomplish the work herein in accordance with latest applicable standards and specifications.

14. Traffic signage and devices shall be in accordance with latest Manual of Uniform Traffic Control Devices.

15. Permission to interrupt any Activity roads, railroads, or utility service is subject to review and approval by

Public Works Dept. and must be requested in writing a minimum of 21 calendar days prior to the desired date of interruption.

16. Night/weekend/holiday work is subject to review and approval by the Contracting Officer.

17. NCDEQ (DEMLR/DWR) and USACE permits are not required. However, all work must be performed outside of any streams/wetlands.

18. Schedule:

I. Phase 1: 180 days II. Phase 2: 60 days III. C.C.T.V.: 30 days

19. Refer to enclosed maps:

I. Camp Lejeune Hadnot Point Raw Water Distribution System II. Camp Lejeune Holcomb Blvd. & Hadnot Point Raw Water Distribution System III. Camp Lejeune Holcomb Blvd. & Hadnot Point Finished Water Distribution System – Auxiliary 1 IV. Camp Lejeune Holcomb Blvd. & Hadnot Point Finished Water Distribution System – Auxiliary 2 V. Camp Lejeune Holcomb Blvd. & Hadnot Point Asbestos Lines