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If you have any questions on the information presented, or require additional report data or attachments, please contact the Report Contact
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In July 2018, the Okanagan Nation Alliance (Kari Alex, Biologist), Mountain Station Consultants (Alan Thomson, P. Eng) and the Regional Parks Manager for the Regional District of Central Kootenay (Cary Gaynor) conducted site assessments at Pass Creek. Data collection and photo documentation were completed to address the objectives.
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Author: Duncan, A.
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Old Reference Number: COL-F19-2769
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Old Reference System: FWCP Fish Wildlife Compensation Program - Columbia
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Date Published: Mar 2019
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Report ID: 57438
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Audience: Government and Public
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Pass (Norns) Creek is the first major tributary to the Columbia River below Hugh Keenleyside Dam adjacent to the town of Castlegar, BC. Pass Creek provides approximately 2.2 km of important spawning habitat for Rainbow Trout (Oncorhynchus
mykiss), Kokanee (Oncorhynchus nerka), and Mountain Whitefish (Prosopium williamsoni) migrating from the Columbia River. In 2015, the Pass Creek Park Management Plan was developed to guide future development, operations and decisionmaking for the park (Olson-Russello and Anderton 2015).
The primary objectives of this project were:
1. Instream Fish Habitat Restoration and Monitoring Plan: prepare an instream restoration and monitoring plan for juvenile rearing and adult overwintering habitat options (Aligns with Priority Action 1 : Habitat-based Action, FWCP 2012).
2. Spawning Channel Feasibility: develop a feasibility study to disconnect the existing swimming pond water supply from surface water withdrawal, and repair a historic off-channel/spawning channel back to a naturalize state. Included in this assessment is determining a spectrum of options for alternative water sources to
provide fresh water into the existing swimming ponds at Pass Creek Regional Campground (Aligns with Priority Action 1 : Research and Information Acquisition Action, FWCP 2012).
In July 2018, the Okanagan Nation Alliance (Kari Alex, Biologist), Mountain Station Consultants (Alan Thomson, P. Eng) and the Regional Parks Manager for the Regional District of Central Kootenay (Cary Gaynor) conducted site assessments at Pass Creek. Data collection and photo documentation were completed to address the objectives.
Briefly, the findings and recommendations for fish habitat restoration in the main stem channel of Pass Creek include (taken from Alex 2019, see Appendix A):
- The meander bends with a radius of curvature less than 60 m are currently and will continue to erode. Any effort to reduce the floodplain width will make these issues worse;
- Gravel sizes are typically too large for spawning Kokanee and small bodied Rainbow Trout;
- Increasing the bankful width to >26 m so the stream can access during Q2yr and decreasing the reach slope (from 0.6% to 0.2%) with more Newbury riffles will retain the substrate sizes that Kokanee and Rainbow Trout use for spawning (30
mm);
- Although this may not be feasible, any further narrowing of the stream will coarsen the bed material negatively for spawners. Spawning channel options may be more suitable but low flow during the fall will be an issue for rearing Rainbow Trout and Shorthead Sculpin;
- Given the reduction in wetted widths, off channel or side channel engagement during spring freshet could offset the stream power during this time and possibly assist the main channel in retaining smaller gravel bed material. More work is
needed to assess the size of these off channel habitats and the flood flow they can accommodate;
- Add more woody debris structures that can withstand a flood discharge of 49 m3/s or Q10yr; and,
- For low flow instream structure, add boulder clusters in pools for cover.
Recommendations for moving forward with assessments:
- Install and maintain discharge station on Pass Creek;
- Continue monitoring water temperature in mainstem and side channel of Pass Creek;
- Survey for hydraulic modeling of potential restoration options;
- Present and discuss these concepts at the community level;
- Monitor the system prior to any works; and,
- Seek out collaboration for these tasks.
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Report Type
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Fish and Aquatic Habitat Information |
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Subject
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Fish Species - Kokanee - Oncorhynchus nerka |
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Fish Species - Rainbow Trout - Oncorhynchus mykiss |
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Fish Species - Shorthead Sculpin - Cottus confusus |
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Region - Kootenay |
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Fish and Fish Habitat - Restoration |
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Program Specific Area - Kootenay Compensation Program |
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