Beginning in 2008, KWF began monitoring turbidity in the lower Kenai River. Elevated levels of turbidity occur in areas where heavy boat traffic occurs for extended periods of time. The highest levels of turbidity occur near shore, which is important habitat for juvenile salmon. Turbidity interferes with the ability of juvenile salmon to feed.

During 2008 we used Hydrolabs to collect turbidity data on a continuous basis at two locations.  Data was collected at River Mile 23, near Swiftwater Park, to establish background turbidity levels in the Kenai River. Data were also collected at River Mile 11.5, near Eagle Rock. This is an area with high boat traffic. Turbidity data was also collected on transects across the river at these two locations and at River Mile 14 (Stewarts Landing) and near River Mile 8.5 (ADF&G Chinook Salmon Sonar site).

During 2009, we collected continuous data with Hydrolabs at the same sites as 2008, plus one new site; River Mile 13.3, just upstream of Pillars boat launch. We also collected data with Hydrolabs periodically at three additional sites; River Mile 19 near the ADF&G Sockeye sonar site, River Mile 15.5 upstream of River Quest Subdivision, and at River Mile 8.5.

We will need to monitor the river for one or two more seasons to determine conclusively if boat wake induced turbidity exceeds water quality standards.