Lower Skeena Fish Passage Assessment Highway #16, #37S, & CN Rail Ken Rabnett Skeena Fisheries Commission January 2006 Lower Skeena Fish Passage Assessment Highways #16, #37S, and CN Rail 2 Skeena Fisheries Commission January 2006 Lower Skeena Fish Passage Assessment Highways #16, #37S, and CN Rail Summary The purpose of this report is to present background information and survey results for the Lower Skeena fish passage assessment conducted along Highway #16, Highway #37South (#37S), and CN Rail. In 2005, the Skeena Fisheries Commission was retained by the Pacific Salmon Commission to conduct a Fish Passage and Culvert Inspection (FPCI) on all non-bridged stream crossings distinguished with fish presence along Highway #16 between Terrace and Prince Rupert, and along Highway #37 between Terrace and Kitimat. A FPCI was also conducted on CN Rail non-bridged stream crossings with fish presence between these three communities. The Lower Skeena fish passage assessment is part of a larger regional effort to improve fish passage limited by highways and secondary roads throughout northwest British Columbia. The primary objective of this project was to focus on increasing the abundance of fish stocks by opening freshwater habitat to salmon spawning and rearing. This project will utilize the fish passage culvert inspection procedure that has been developed to evaluate one of the most easily addressed fish habitat constraints, access to existing habitat. The fish passage culvert inspection methodology is based on the BC Government fish passage protocol outlined in: Fish Passage – Culvert Inspection Procedures, Parker, 2000 (FPCI). Essentially, the FPCI fieldwork includes: measuring the stream and culvert characteristics, noting the fish bearing qualities and quantities, evaluating barriers, and taking upstream and downstream photographs from the culvert inlet and outlet. Office calculations are followed by prioritization of assessed culverts. FPCI results in this report are structured into two parts: Highway #16 and CN Rail − Terrace to Prince Rupert, followed by Highway #37 South and CN Rail − Terrace to Kitimat. Twenty-eight fish bearing stream reaches crossed by Highway #16 and CN Rail are culverted. Of these twenty- eight stream reaches, ten are characterized as having fish passage issues, consisting of various types and degrees of barriers along with abundance and value of upstream fish habitat. Of these ten streams, three are rated as high priority. The other seven streams are rated as low and medium priorities due to a lack of fish distribution, marginal to poor habitat conditions, or large capital restoration costs versus the amount of high and moderate fish habitat potentially gained. Most of the twenty-six fish bearing stream reaches crossed are culverted by both Highway #16 and CN Rail. However, some streams are only culverted at one right-of-way, and in other cases no culverts exist. Fish passage surveys were conducted on Highway #37S and CN Rail Kitimat Subdivision show thirty-five fish bearing streams. Of these thirty-five stream reaches, one is characterized as having a fish passage issue and it is rated as high priority. Nine culverts need maintenance effort and the majority of these are beaver activity issues. In general, streams crossed by Highway #37 and CN Rail through the Lakelse and Kitimat drainages exhibited relatively superior compliance with fish passage guidelines. This is evidenced by the numerous new culvert or bridge structures on streams crossed by Highway #37 and CN Rail. Powerline Creek, Cable Car Creek, and Scully Creek channels−north, central, and south have caused fish passage problems in the past, but recent rehabilitation efforts have ensured straightforward juvenile and adult migration. CN Rail has recently upgraded several culverts and has completed comprehensive revegetation activities. Exchamsiks Backchannels (Map Culvert No.s 35, 36, 37, and 38) are the highest priority culverts to rehabilitate in this study. Support for moving forward with planning, restoration, and funding efforts has been verbally forthcoming from Department of Fisheries and Oceans and the B.C. Ministry of Highways. 3 Skeena Fisheries Commission January 2006 Lower Skeena Fish Passage Assessment Highways #16, #37S, and CN Rail 4 Skeena Fisheries Commission January 2006 Lower Skeena Fish Passage Assessment Highways #16, #37S, and CN Rail Table of Contents Summary .............................................................................................................3 Acknowledgements ............................................................................................7 Introduction.........................................................................................................9 Fish Passage ................................................................................................................................................................. 9 Methods .............................................................................................................10 Highway #16 and CN Rail − Terrace to Prince Rupert ...................................13 LOWER SKEENA RIVER BACKGROUND.................................................................................................................. 13 Location................................................................................................................................................13 Lower Skeena River .............................................................................................................................13 Hydrology .............................................................................................................................................14 LOWER SKEENA RIVER FISHERIES VALUES ......................................................................................................... 16 Chinook ................................................................................................................................................16 Sockeye................................................................................................................................................16 Pink ......................................................................................................................................................16 Chum....................................................................................................................................................17 Coho.....................................................................................................................................................17 Steelhead .............................................................................................................................................17 Eulachon ..............................................................................................................................................17 FISHERIES ................................................................................................................................................................... 18 First Nations Traditional Use ................................................................................................................18 Recreational Fisheries..........................................................................................................................18 Enhancement Activities ........................................................................................................................18 DEVELOPMENT ACTIVITIES ...................................................................................................................................... 19 Forest Resource Development.............................................................................................................19 Transportation & Utilities Development ................................................................................................20 Highway #16 & CN Rail − Prince Rupert to Terrace FPCI Results ................21 Lower Skeena River .................................................................................................................................................... 21 High Priority Fish Passage Sites ............................................................................................................................... 23 Exchamsiks Backchannels Culverts.....................................................................................................23 Exchamsiks Backchannels Fish Values ...............................................................................................29 Exchamsiks Backchannels Habitat Values...........................................................................................30 Exchamsiks Backchannels Restoration Priority....................................................................................31 Medium Priority Fish Passage Sites.......................................................................................................................... 33 LOW Priority Fish Passage Sites............................................................................................................................... 39 Highway #37 and CN Rail − Terrace to Kitimat FPCI Results........................45 Lakelse and Kitimat Rivers Background................................................................................................................... 45 Location................................................................................................................................................45