Design of low-cost fishways
Fisheries Bioengineering Symposium: American Fisheries Society Symposium 10
Colt J;White RJ;
American Fisheries Society
Fishways have traditionally consisted of concrete flumes built on the side of a dam. This paper presents two alternative constructions that have recently been built in southwestern Ontario for the passage of rainbow trout Oncorhynchus mykiss and other salmonid species around mill dam structures. The first structure is a fishlock; after fish enter a lower chamber, water fills a transport pipe, allowing fish to swim above the dam. Concrete sewer pipe was used for the transport and ancillary water supply pipes. The second structure is an earthen bypass channel equipped with concrete baffle blocks. Both bypass methods resulted in considerable cost savings compared with concrete flume construction.