Illinois Falls fish ladder

Technical Report

Public Deposited

Citeable URL: https://ir.library.oregonstate.edu/concern/technical_reports/gb19f689d

Descriptions

Attribute Name	Values
Creator	Jacobson, Donald M. Borovicka, Robert L. Oregon. State Game Commission. Fishery Division
Abstract	The construction of Illinois Falls fish ladder on the Illinois River in Oregon was completed in November 1961. The ladder was opened and operated during the winter of 1961-62. Final cleanup and rock removal was completed in the fall of 1962. The ladder was installed on a natural barrier where fish passage was delayed by low and moderately high river levels. The facility installed was a concrete vertical baffle-type fishway patterned after the Hells Gate fishway in use on the Fraser River in Canada. Since the ladder has been installed, salmon and steelhead have arrived at upper river areas much earlier than previously recorded. Concentrations of fish have not been observed below the falls.
Resource Type	Technical Report
Date Available	2013-10-21T14:31:45+00:00
Date Issued	1963-03
Non-Academic Affiliation	Oregon. Department of Fish and Wildlife
Series	Habitat improvement project (Oregon. Fishery Division)
Subject	Fishways -- Oregon -- Illinois River
Rights Statement	Copyright Not Evaluated
Publisher	Oregon. State Game Commission. Fishery Division
Peer Reviewed	No
Language	English [eng]
Digitization Specifications	File scanned at 300 ppi (256 Grayscale) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces	http://hdl.handle.net/1957/43318

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