The Roberts Creek Diversion replaced an existing layflat diversion dam with a natural, rock riffle diversion design that will deliver the water right as well as provide natural fish passage for native species.
The Roberts Creek Diversion replaced an existing layflat diversion dam, constructed in 2006, to divert water into the existing ditch system. The diversion dam was constructed with temporary headgates that were to be removed with the installation of a new belt fish screen by ODFW at the headwall location. ODFW subsequently installed a drum fish screen 50 linear feet down the ditch. The temporary headgates were not capable of satisfying the fish screen submergence criteria with resulting in inefficient fish passage bypass flow requirements.
Structure Prior to Construction
Fish Passage prior to construction - Designed for low head passage
Taken from the South bank of the stream looking Upstream at the roughened channel apron and the riffle crest. In the center, back of the photo is the headgate inlet structure and the flush headgate.
Taken from the South bank of the structure looking at the riffle crest in the foreground with the inlet structure and flush headgate in the background toward the right of the picture.
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