Deadline for Questions: 2/1/2024 Description of Proposals Sought:
The Confederated Tribes of the Colville Reservation (CTCR) Anadromous Fisheries
Division are seeking proposals from qualified engineering firms to award engineering
and design services contract to support salmon and steelhead habitat improvement
projects on Salmon Creek, a tributary to the Okanogan River in Okanogan County,
Washington. The contract resulting from this request will cover site investigation and
restoration plan completion for habitat restoration actions on CTCR owned lands. The
Colville Confederated Tribes intends to award the design contract to the highest
quality bidder for the scope of work described in this RFP. The performance period
for the awarded contract will be between the contract state date and October 31, 2025. Project Description
The Colville Confederated Tribes Anadromous Fisheries Division are developing
salmon and steelhead habitat improvement projects on Salmon Creek on property
owned by the CTCR. The contract resulting from this RFP will be for development of
a stream habitat improvement strategy through final design on Salmon Creek from
(RM 8-4.9). This reach of Salmon Creek experiences elevated flows through the
summer due to its use as an irrigation conveyance ditch for Okanogan Irrigation
District from the Conconully Reservoirs to the OID ditch system downstream of the
project site. This results in Salmon Creek not experiencing the typical low summer
flows of tributaries of the Okanogan River. Low flows in Salmon Creek occur during
the non irrigation season and result in water flows of 2-4 cfs. During periods of
uncontrolled spill from Conconully Reservoir water levels can be as high as 800 cfs.
This flow regime coupled with the incisions and channelization of Salmon Creek has
resulted in a lack of complex habitat particularly in the loss of large woody debris and
the associated scour that occurs around them. Questions Regarding the RFP
Requests for interpretation/clarification of this RFP must be emailed to
John.Box.FNW@colvilletribes.com Unauthorized contact with other tribal
employees regarding this RFP may result in disqualification. All oral communications
will be considered unofficial and non-binding on the Tribes.
All questions must be submitted no later than 3:00 p.m., PST, February 1, 2024. All
responses will be posted on the Tribes' web site Scope of Work
Stage 1
Data review and site survey
The contractor will review existing data from private or government entities that
would aid future analysis and design. It is assumed this data should consist of fish use
and habitat surveys, stream flow data, historical air photos, geomorphic field survey,
hydrology, and hydraulic analysis.
To better understand local river process, including fluvial geomorphology and
sediment delivery, the creek will be walked within the site boundaries and a sufficient
distance up and downstream to gain a reach level understanding of present conditions.
An overview of current reach conditions will be documented with general field notes
and photos.
Obvious infrastructural elements such as riprap, levees, bridges, irrigation diversions,
well heads, power lines, building foundations, and/or other such elements should be
included in the 30% design.
Hydraulic analysis
LIDAR data may be used to complete hydraulic modeling and floodplain cross
sections. Manning's n values will be estimated from reference literature, professional
experience and opinion.
Stream Hydrology
Peak stream flow frequencies will be obtained or estimated using available gage data
and/or published regression equations appropriate for the site.
Stage 2
Develop Conceptual Reports, and Drawings
Site Investigation findings will be used to provide three restoration strategies and
options to improve habitat for adult and juvenile salmonids over a range of flow
conditions with a focus on both summer and winter low flow periods. Alternatively, a
matrix of restoration options may be presented that CTCR biologists can select from.
Restoration strategies shall be developed with consideration of the limiting factors
identified by EDT modeling available at website
Deliverables will include a report of findings from stages 1 and 2. A drawing set of
conceptual restoration designs, and planning estimates for review by both CTCR
biologists and BPA staff.
The conceptual report and all designs will be compiled in a manner consistent with
BPA's HIP III General Project and Data Summary Requirements.
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