Statement_of_Work_Water_Control_Structures_04172023_0002.pdf

STATEMENT OF WORK

DELIVERY OF WATER CONTROL STRUCTURES AND MATERIALS TO MERCED

NWR

1. GENERAL: The contractor will manufacture and/or procure and deliver pre-cast concrete water control weirs with pipe stubs, pre cast solid wall water control weirs for installation as headwalls, weir boards, pipe and couplers to various locations of the Merced NWR. Specific materials requirements are provided in Section 2.

2. SCOPE:

A. QUALITY CONTROL

All workmanship and materials furnished and supplied under this specification are subject to inspection by the project technical coordinator and site foreman including all operations from the selection and production of materials through to final acceptance of delivered materials. The technical coordinator reserves the right to reject any materials which are not in accordance with the requirements of this specification.

B. SPECIFICATIONS

B.01 MATERIALS SUPPLIED TO THE PROJECT

TO BE DELIVERED TO Merced National Wildlife Refuge-Maintenance Shop

• One (QTY 1) 5X6 36" WATER CONTROL WEIR WITH 5' PLAIN END STUB

• Seven (QTY 7) 5X5 24" WATER CONTROL WEIR WITH 5' PLAIN END STUB

• Eight (QTY 8) 4X4 24" WATER CONTROL WEIR WITH 5' PLAIN END STUB

• One (QTY 5) 5X7 30" WATER CONTROL WEIR WITH 5' PLAIN END STUB

• One (QTY 1) 5X5 30" WATER CONTROL WEIR WITH 5' PLAIN END STUB

• One (QTY 1) 5X6 30" WATER CONTROL WEIR WITH 5' PLAIN END STUB

• Two (QTY 2) 5X7 42" WATER CONTROL WEIR WITH 5' WATERTITE STUB

• Four (QTY 4) 4X4 WATER CONTROL WEIR WITHOUT PIPE - SOLID WALL

• Three (QTY 3) 5X6 WATER CONTROL WEIR WITHOUT PIPE - SOLID WALL

• Ten (QTY 10) 5X5 WATER CONTROL WEIR WITHOUT PIPE - SOLID WALL

• Five (QTY 5) 5X7 WATER CONTROL WEIR WITHOUT PIPE - SOLID WALL

• Six-hundred feet (QTY 30) 24" ADS SERIES 95 PLAIN END POLYETHYLENE PIPE

VIRGIN,20’ sections

• One-hundred forty feet (QTY 7) 30" ADS SERIES 95 PLAIN END POLYETHYLENE

PIPE VIRGIN, 20’ sections

• Forty feet (QTY 2) 36" ADS SERIES 95 PLAIN END POLYETHYLENE PIPE, VIRGIN, 20’ sections

• Forty feet (QTY 2) 42" ADS SERIES 65 WATERTITE POLYETHYLENE PIPE, VIRGIN, 20’ sections

• Forty-four (QTY 44) 24" MAR MAC COUPLER

• Forty-four (QTY 44) 24" ADS SERIES 95 SPLIT COUPLER w/zip ties

• Nine (QTY 9) 30" MAR MAC COUPLER

• Nine (QTY 9) 30" ADS SERIES 95 SPLIT COUPLER w/zip ties

• Three (QTY 3) 36" MAR MAC COUPLER

• Three (QTY 3) 36" ADS SERIES 95 SPLIT COUPLER w/zip ties

• Two (QTY 2) 42" MAR MAC COUPLER

• Two (QTY 2) 42" ADS SERIES 95 SPLIT COUPLER w/zip ties

• Sixty-four (QTY 64) 2X6X55 1/2" REDWOOD WEIR BOARDS

• One-hundred thirty two (QTY 132) 2X6X68 3/8" REDWOOD WEIR BOARDS

B.02 PRECAST CONCRETE WATER CONTROL STRUCTURES

Precast concrete weir (riser) structures shall conform to the sizes and dimensions as listed above.

Precast concrete weirs shall have two (twin) weir bays for stop logs. Each structure shall have a minimum 5-foot-long stub of pipe cast into the structure with the type and dimension equal to that of the attached pipe as specified in Section 2.

The end of the pipe stub to be cast into the concrete structure shall be cut even and square, and set flush with the face of concrete. Structures shall have the pipe cast such that the invert is at or near the structure flowline. The surface of pipe to be embedded into concrete shall be clean of oils, dirt, and loose debris prior to being cast into the structure. All structures shall be manufactured by Machado Backhoe Inc, Briggs Manufacturing, or approved equal.

B.03 WOOD STOPLOGS/WEIR BOARDS

A complete set of stoplog boards shall be supplied for each structure cast with a pipe stub. Each board will be cut to fit individual structures including a 3/8-inch clearance on each end to allow for swelling when wet. Stoplogs shall be 2x6 rough cut (full 2 inch thickness) redwood. Wood stoplogs shall be free of knots or knotholes.

B.04 HDPE PIPE

Water tight HDPE (high density polyethylene) pipe shall be of the nominal size indicated in the project description sheet. The pipe shall be profile wall (corrugated) with a smooth interior and meet the requirements of ASTM F2648 or F2306, and ASTM D3350.

B.05 HDPE PIPE COUPLERS

Couplers for HDPE pipe necessary to complete installation in addition to the integral bell and spigot joints shall be Mar Mac Products “Polyseal” couplers.

3. PLACE OF DELIVERY AND PERIOD OF PERFORMANCE:

Deliveries will be to two locations within the Merced National Wildlife Refuge, Merced, CA 93645. See SPECIFICATIONS section B for locations of where each materials are needed to be deliver Period of performance is from May 1, 2023 – July 30, 2023.

Delivery Location(s):

1. Merced National Wildlife Refuge-Maintenance Shop 7430 W Sandy Mush Rd Merced, CA 95341

4. GOVERNMENT FURNISHED EQUIPMENT OR MATERIALS/INFORMATION:

None

5. AVAILABILITY: Normal delivery hours are Monday thru Friday 7:00 a.m. – 4:00 p.m

6. TECHNICAL COORDINATOR: Gabriel Sandoval, Merced Assistant Refuge Manager.

Cell Phone 209-587-5530. Office # (209) 826-3508, ext. 125 Site Foreman: Kyle Whiteaker, Engineering Equipment Operator, Cell #209-587-0368.