Forest Investment Account (FIA) - Land Base Investment Program
FIA Project 2638001

    Water Quality Effectiveness Evaluations and Culvert Inspections
Project lead: Kitwanga Lumber Co. Ltd.
Contributing Authors: Koch, Kevin; McCarthy, Mike
Subject: Forest Investment Account (FIA), British Columbia
Series: Forest Investment Account (FIA) - Land Base Investment Program
123 stream crossings were surveyed in the southern Kitwanga River Watershed for fish passage using the Fish Passage-Culvert Inspection (Parker 2000) and for sediment risk using the Water Quality Effectiveness Evaluation (Carson et al. 2007). Two crossings on suspected fish bearing streams were classified as barriers with further habitat and fish assessment recommended. Six of 104 crossings surveyed ranked from moderate to extreme sediment risk, 59 ranked low risk, and the remainder were zero risk. Remedial recommendations included grass seeding, bioengineering, road deactivation and constructing waterbars. Overall, current fish passage and sediment risks are considered minimal for this part of the watershed, with regards to forestry roads. However, absence of fish caught with gee trapping indicates potential blockages downstream, possibly at highway crossings, and is an area needing further investigation. Future sedimentation risk is considerable as road crossings age and deteriorate, and could eventually release into the watershed if not maintained or removed.


Final Report (19.6Mb)
Southern Kitwanga Map (1.5Mb)
Sample Area Information Card (59Kb)

To view PDF documents you need Adobe Acrobat Reader, available free from the Adobe Web Site.

Updated August 16, 2010 

Search for other  FIA reports or other Ministry of Forests and Range publications.

Please direct questions or comments regarding publications to