Kaweah Wave Attenuation Case Study

Lake Kaweah, CA


In 2008 The Army Corps of Engineers installed a Sawtooth barrier system in one area of the lake to keep boat traffic out of a sensitive area.  The project proved successful. In 2010 The Kaweah River Power Authority engineered and installed a Sawtooth system to prevent wave action at “full pool” in the May – July period, and prevent those waves from washing over and undermining the bottom of the dam in the northwest section of the lake. Water depth is 12-15ft (4-5m).


Installation Type - Sawtooth System - Model 3636

Water Type Prevailing Wind Wave Length Wave Height Fetch Distance Dissipation Minimum
Fresh South East - North West <15ft (4.5m) <2ft (<61cm) 3 mi (>5km) >75%

Cost

Total Length Total Units Total Material $
WE + Hardware + Frt
Installation
Personnel + Hours
450ft (136m) 168 $53,000.00 4 @ 40=160 (1 wk)

Design Layout

Results

Contract was completed in July of 2010. According to the engineer, the installation went as planned and the units performed as expected. They incurred no wave action over the spillway.