In December of 1937, the Iowa Conservation Commission entered into a cooperative agreement with the Iowa Institute of Hydraulic Research of the State University of Iowa for the investigation of fishways. This agreement had for its purpose the development of a fishway, which could be practically installed at reasonable costs, and yet, provide efficient passage for fish over river barriers such as the hydro-electric dams that impound water in many Iowa streams. In the course of the investigation, but under a set of special conditions, a modification of the Denil type fishway was determined far superior to the many other types studied. On the basis of these studies, the Iowa Conservation Commission adopted the Modified Denil Fishway as the type to be used in Iowa and installed the same at several dams along the Des Moines and Cedar Rivers. It is the purpose of this paper to introduce into the literature the data collected on the use by fish of the Modified-denil Fishway under natural conditions in the Des Moines River for the years 1946 and 1947.
Proceedings of the Iowa Academy of Science
©1948 Iowa Academy of Science, Inc.
Harrison, Harry M.
"Use by Fish of the Modified Denil Fishway In The Des Moines River,"
Proceedings of the Iowa Academy of Science, 55(1), 367-373.
Available at: https://scholarworks.uni.edu/pias/vol55/iss1/54