Water Stewardship Information Sources
| ID | 938 |
|---|---|
| Citation | Integrated ProAction Corp. 2007. Cayoosh Creek Watershed Risk Assessment. |
| Organization | Ainsworth Lumber Company Ltd. |
| URL | http://www.for.gov.bc.ca/hfd/library/fia/2007/LBIP_4611011a.pdf |
| Abstract/Description or Keywords | This Watershed Risk Assessment is a Forest Investment Account (FIA) funded project to identify and complete a risk assessment for the non-status roads in the Cayoosh Creek Watershed. Ainsworth Engineered Canada LP is the lead licensee and responsible for the management of FIA funding in the Lillooet Timber Supply Area (TSA). This project followed the standards outlined in the FIA Activity Standards for Road Deactivation, Landslide and Gully Rehabilitation Projects Document (Version 5 - 2003/2004). The risk assessment was carried out in conjunction with an Access Management Plan for the Cayoosh Creek Watershed. The objective of this project is to complete a risk assessment for each non-status road within the project area. The results from this project will be used in the Access Management Plan to determine which non-status roads should be deactivated and which should receive environmental maintenance. The Cayoosh Creek watershed is located southwest of the district of Lillooet and covers an area of approximately 1165.3 km2 . The project area includes: Cayoosh Creek, Enterprise Creek, Downton Creek, Boulder Creek, Gott Creek, Van Horlick Creek, Casper Creek, Blowdown Creek, Texas Creek, and Seton ridge. A partial risk analysis was completed for the non-status roads that were identified within the project area. Partial risk analysis involves determining the likelihood of occurrence of a landslide and that landslide being a hazard to and directly or indirectly reaching or otherwise affecting a specific value at risk. Risk, as it pertains to this project, relates to the likelihood of landslides resulting from forest development (roads) and surface erosion and sediment delivery to streams and was determined to be the product of the risk multiplied by the consequence. Of the 225 non-status roads or road sections identified in the project 13 are classified as very high risk, 29 are classified as high risk and the remaining 183 were classified as either moderate or low risk. This report provides a qualitative evaluation of potential landslide and erosion hazards associated with non-status roads in the project area, an estimate of the downslope/downstream landslide consequences, recommendations, and a prioritized list for future field assessments and remedial work. Field assessments were not possible due to the timing of the project. A field assessment of all the roads is required in snow-free conditions to confirm the risk ratings determined in this report. |
| Information Type | report |
| Regional Watershed | Fraser |
| Sub-watershed if known | Cayoosh Creek |
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| Comments | |
| Project status | complete |
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