Site work for a water / sewer project in Nespelem, Washington. Completed plans call for site work for a water / sewer project.

Scope: Assist with designing a semi-permanent resistance panel weir to be placed within the lower 3 km of the Sanpoil River. Weir must be able to hold up to 50 adult trout/salmon, be outfitted with a PIT tag array, have underwater cameras, and be able to operate in waters between 30 and 1,000 cfs. Question Deadline 12/18/2024 at 4:00 PM PT Requests for interpretation/clarification of this RFP must be emailed to holly.mclellan@colvilletribes.com Retainage/Performance Bond Any contract negotiated in response to this RFP will require either a 25% retainage or a performance bond. Any contract awarded with a value greater than $100,000 will require a performance bond Scope of Work Background - The Sanpoil River is a major tributary to Lake Roosevelt in Northeast Washington originating north of Republic, Washington. The river flows for 43.5 km through parts of the Colville and Okanogan National Forests along a mountainous valley approximately 1.6 kilometers wide and then enters the Colville Confederated Tribes Reservation North of 13 Mile Creek. It then flows south for 59.5 kilometers through the Reservation and ends at Lake Roosevelt, the impounded portion of the Columbia River behind Grand Coulee Dam at river kilometer 990.5. The river has several main tributary streams providing additional flows and habitat availability to the system. The main tributaries to the Sanpoil are the West Fork of the Sanpoil River, 21 Mile Creek, North and South Nanamkin Creeks, Thirty Mile Creek, and Bridge Creek. A USGS gauging station (12434590 above Jack Creek) monitors daily discharge. Since 2015, the peak discharge has ranged between 937 and 5,620 cfs, the mean annual average is approximately 345 cfs, and the low summer flows can reach 30 cfs. The current removable ridged weir is placed at the mouth of the Sanpoil River, Washington (48.063985, -118.670342) and operates between July and November of each year. This weir is often clogged with debris and silt moving downstream, lacks a large enough holding box to support adult Redband Trout (steelhead sized Rainbow Trout), kokanee salmon (Sockeye sized kokanee) and adult Chinook migrating upstream, and cannot operate above 300 cfs. The trap cannot be installed until July when flows have receded, thereby not being functional during the spring Redband Trout migration (or any spring migrating fish). The trap is operational during the summer and fall (kokanee/Sockeye Salmon/fall Redband Trout run), however warm water temperatures do not allow trapping during portions of August. The trap must be removed before the end of November as ice builds up on the panels during cold temperatures that then create ice dams. Sanpoil River Weir Phase 1: Conceptual Design: The contractor will work with Colville Tribal biologist to conceptually design a resistance panel weir (or other fish trapping facility) that will be used to 6 monitor lacustrine adfluvial Redband Rainbow Trout and kokanee salmon during the late spring, summer, and fall runs. The target weir operational timeframe will be April/May through November (30 to 1,000 cfs). In addition, all other native and any reintroduced fish must be able to navigate the trap structure, which include suckers, Burbot, Mountain Whitefish, Chinook Salmon and other minnows. Phase 1 completed by March 1, 2025. The contractor will work with the Colville Tribal biologist to select the best location for the weir location that will be located between the current site (mouth of the Sanpoil River) and Silver Creek Bridge (48,083109, -118.689994). The trap will be designed as to not alter the natural flow of water or sediments through the system. The trap must contain a holding area for at least 50 adult fish of various sizes. The weir must be able to be outfitted with a PIT tag array, a video camera for migrating adult fish and be able to be monitored with cameras at night to count fish when water temperatures are warm (solar or electric). The Project deliverables include: 1. Site visit with the project biologist; 2. Monthly meetings with project biologist to discuss project status; 3. Conceptual design of the weir and recommended site location (15% of the design); March 1, 2025. 4. Weir trap design (30%) due April 1, 2025. 5. Weir trap design (80%) due May 1, 2025. 6. Weir trap design (100%) due June 1, 2025. 7. Engineered design will include specific plans that include details related to all measurements, specific hardware to be used, placement of hardware, specifics to the types of materials to be used, permits required and any and all details required to implement 8. Fabrication, Installation and Testing - time frame estimates 9. Timeline and cost breakdown of each phase Weir Trap Specifications: 1. The contractor will assist the Colville Tribes with determining the optimal location for the weir between the mouth (48.063985, -118.670342) and Silver Creek Bridge (48,083109, -118.689994). 2. The weir will need to allow fish to move freely downstream over the panels (panel spacing (0.5-1.0 in), have a collection box for upstream migrating fish that can hold up to 50 fish of varying sizes, be able to be outfitted with a PIT tag array and camera system, and withstand up to 1,000 cfs. 3. Conceptual design of the weir, with power options (solar or electric) that meets the project needs, 4. Estimated costs and timeline of fabrication and installation. 5. Fish will need to be accessed by staff safely during high water flows. A walk way or bridge to the holding box will likely be required. Fish will be processed (length, weight, scanned for PIT tags, injected with PIT tag in not marked) and released The Tribes anticipates the service period for this work to be approximately 10 months Firms must have experience in fish weir designs and traps. The owner intends to award one contract for design and construction, but proposals for design only will be accepted.