. Columbia River fisheries development program. Fisheries Columbia Ifc"^ Figure 27 Drawing of fish ladder in Figure 28 A small fish ladder over a barrier on Wiley Creek in Oregon. The f ishway began operating with one entrance in February 1968. Three entrances were complete in October 1971 when the f ishway was formally dedicated. A fourth entrance was finished in September 1975. The f ishway has three legs which join below the counting station located at the top of the ladder near the single exit into the forebay (Figure 29). The cul-de-sac leg has its entrance farthe
. Columbia River fisheries development program. Fisheries Columbia Ifc"^ Figure 27 Drawing of fish ladder in Figure 28 A small fish ladder over a barrier on Wiley Creek in Oregon. The f ishway began operating with one entrance in February 1968. Three entrances were complete in October 1971 when the f ishway was formally dedicated. A fourth entrance was finished in September 1975. The f ishway has three legs which join below the counting station located at the top of the ladder near the single exit into the forebay (Figure 29). The cul-de-sac leg has its entrance farthest downstream, in a large bay where up to 29 industrial hydroturbines discharge, and has been designated entrance 1. Entrance 2 is located on the west side of the horseshoe area of the falls. En- trance 3 is located near the apex of the falls. And entrance 4 is located about20' above entrance 3 and on the same leg (Figure 30). Since the destruction of the old fish ladder on J une 1,1970, all fish moving upstream have passed a viewing window in the counting station of this fishway except for the few fish that may have passed through the boat locks. A second viewing window is located near the top of the cul-de-sac leg. 21. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. National Marine Fisheries Service. [Washington, D. C. ] : U. S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service
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