B01_A1_SOW_1.pdf

Fort Belknap Indian Irrigation Project: White Bear Diversion Rehabilitation Project

Statement of Work

I. Purpose The Bureau of Indian Affairs (BIA) requires the services of a construction contractor to remove and replace the White Bear Diversion, located on the Fort Belknap Indian Irrigation Project (FBIIP). All work under this contract must be coordinated to avoid impacts to irrigation water deliveries and comply with all environmental work restrictions and / or permitting requirements.

To accomplish the project objectives, the BIA seeks to hire a reputable, competent, and qualified construction contractor familiar with constructing hydraulic (diversion) structures, earthwork, and foundation dewatering in remote areas as well as familiarity with cold weather concrete placement practices. The successful contractor must be able to work under challenging construction schedules and time constraints, react to unforeseen conditions, and work with the BIA to deliver a successful project within the defined work restrictions and milestone dates.

II. Background The Fort Belknap Indian Irrigation Project is in North Central Montana. (See Figure 1). The White Bear Diversion was originally constructed in 1988, and is located 13.5 miles east of Fort Belknap Agency, on MT Hwy 2. Diverting water impounded by the White Bear Dam, the diversion structure controls flow into the FBIIP Main Canal C via four gates, of which 2 are inoperable.

The diversion structure will be rehabilitated. This will include removal of the diversion headgate structure, cofferdam construction as needed, foundation dewatering as necessary, construction of a new reinforced concrete structure with two new steel slide gates, safety railings, placement of riprap, and other miscellaneous structural, operational, and safety improvements. The existing structure is approximately 50-feet wide with wingwalls, and 10 feet high.

Construction schedule cannot adversely affect irrigation deliveries. Irrigation season is defined as beginning May 1 and ending October 30th. At this Main Canal C, irrigation deliveries are completed by October 1. Work must be completed and ready to deliver water by April 15.

Figure 1. Location Map

III. Scope of Work The project shall be carried out in accordance with the contract provisions, technical specifications, and design drawings. The project includes the following principal components of work; refer to the plans and technical specifications for more detailed requirements and descriptions.

Principal components of work are summarized as follows.

1) Mobilization, preparatory work, and permits.

2) Demolition and disposal of items as specified. This includes the existing diversion structure, walkway, and gates.

3) Site excavation to subgrade, other excavations as needed to facilitate contractor’s work, subgrade dewatering, and cofferdams as required to control surface water and / or protect the work site.

4) Subgrade preparation, forming, and placement of reinforced concrete slabs and walls per specifications and plans.

5) Procure and install headgates (2 each) per specifications and plans.

6) Supply, procure, fabricate, and install walkways and handrails per the specifications.

7) Furnish and place riprap, non-woven geotextiles, and any other work necessary for permanent erosion control per specifications and plans.

8) Site reclamation, removal and disposal of excess materials, dust control (throughout construction), seeding and revegetation.