Capacity. Culverts should tiave sufficient capacity to pass the design 

 flood with no backwatering or ponding at the upstream end. 



Location. 



A. Culverts should not be placed where a channel cutoff or diversion 

 will resu I t . 



B. The culvert should be placed so that its discharge is not directed 

 at an unstable bank. 



Multiple Culverts. A 1.8 m spacing should be present between adjacent 

 culvert walls. This will provide a downstream backwater area for fish to rest 

 in before attempting passage. 



REFERENCES 



Dryden, R. L., and J. N. Stein. 1975. Guidelines for the Protection of the 

 Fish Resources of the Northwest Territories During Highway Construction 

 and Operation: Environment Canada. Fisheries and Marine Service Tech. 

 Rept. SeriesNo. CEN/T-75-l. 52 pp. 



Jones, D. R. 1975. An Evaluation of the Swimming Performance of Several Fish 

 Species from the MacKenzie River. Dept. Environment, Fisheries 

 and Marine Service, Winnipeg, Man. 53 pp. 



U. S. Dept. of Agriculture. 1979. Roadway Drainage Guide for Installing 



Culverts to Accommodate Fish. Engineering and Aviation Management Div- 

 ision, Forest Service. Alaska Region Report No. 42. 121 pp. 



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