Performance Work Statement Gas Line Repairs rev2

Statement of Work
Project Title: Gas Line Repairs
NexGen Work Task #: 19118554 & 19262956

1. Objectives:

The Contractor shall repair and replace existing gas leaks on 6” pipe and 8” pipe and valves, along with some associated component replacement on 2” pipe and valve. New piping and components shall be rated for natural gas distribution service in accordance with regulations and standards listed below in Other General Requirements.

2. Conditions:

Gas is provided to the Base boundary by Black Hills Energy. The existing 6” gas line by B479 has a leak at an old abandoned saddle connection near a 6”x2” service tee. The 6” and 2” line are HDPE.
The existing 8” valves on the main line near B73 are leaking at the connecting gasket, and are stuck open as well, requiring full replacement. The existing 8” material by B73 is steel pipe with 8” steel valves.
The period of performance shall be from time of award until 30 April 2027.

3. Project Requirements

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The Contractor shall visit site before starting any work to verify existing conditions space requirements in work areas.
The Government shall provide excavation and backfill. The Contractor shall coordinate with the Government for excavation timelines.
The Contractor shall coordinate with the Government for system operation to allow the work and testing. Two week notice is required for outages.
The Contractor shall provide all required Lock-Out-Tag-Out work and equipment. For welding work, copies of the welder certifications shall be presented for record. The Contractor shall coordinate with Black Hills Energy as required for any gas outage required for the work.
The Contractor shall repair the existing gas leak at the 6” line near B479 by replacing the leaking section of pipe, additionally replacing the adjacent 6”x2” service tee in the process. The 6” line must be isolated on the north side by line stop or pinching to avoid requiring isolation of the B1000 facility. The repair of the 6” shall be scheduled and completed as soon as practicable. The Contractor shall replace the leaking and inoperable 8” valves and flanges on the 8” main line near B73. The lines must be isolated on the west side via line stop or via coordination with Black Hills Energy to isolate further west on their piping/equipment. The new valves shall include new valve boxes and risers, marked for Gas.

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Due to outage requirements, the replacement of the 8” valves shall be performed once warmer