The unnamed tributary that eventually drains into Doobah Lake is considered highly valuable habitat for fish. Chinook (Oncorhynchus tshawytscha), coho (O. kisutch) and chum salmon (O. keta) as well as rainbow (and steelhead) (O. mykiss) and coastal cutthroat trout (O. clarki) species (MOE, 2009) Resident cut-throat trout were captured during this project. Doobah Lake is part of the greater Nitinat Lake fish and recreation area. There is 1 km+ of potential rearing channel above this culvert site that was previously inaccessible to fish. The previous twin 900 mm culverts (assessed in January 2009) were deemed a fish passage barrier in the S3-classified channel (Robert et al., 2009). Funding from the Forest Investment Account (FIA), administered through BC Timber Sales, was provided to upgrade the crossing. StoneCroft Project Engineering designed, prescribed and supervised the installation of the 3300mm x 25meter replacement culvert set at 4.0% gradient. M.C.Wright & Associates and Noel Phillips of BRAT Expediting provided environmental and construction monitoring for works conducted by Star Contracting Co. Ltd. in Sept. /October 2009. The culvert replacement project was intended to create year-round access to fish habitat above the crossing and to extend the natural stream bed into the culvert by backfilling the CMP to 1.32m with gravel of approved size for spawning and rearing use by fish. In order to ensure the new culvert would function as intended, the channel transition, into and out of the new culvert was re-established and reconnected into this stream.
Additionally, 75m of upstream channel stabilization was performed to ensure channel location into the culvert.