Redd Dewatering Monitoring and Assessment on the Sacramento River What is redd dewatering? Dewatering Monitoring and Assessment Conditions that cause redd dewatering? What percentage of fall-run redds are being dewatered while eggs and fry are still in the gravel? Study Question Red Bluff Redding Anderson Bend Keswick Dam 5 5 Los Molinos STUDY AREA Sacramento River Redding to Los Molinos About 70 miles of River 5 Eggs and Fry in Gravel - 60 to 90 days OctNovFebDecJan Fall-run Spawning Mar SACRAMENTO RIVER FALL-RUN SPAWNING LIFE HISTORY Flow COMPETING DEMANDS ON SHASTA LAKE WATER Water Supply Delivery/Storage Flood Management Fall-Run Spawning Winter-Run Cold Water Pool 30-Sep 30-Oct 30-Nov 30-Dec 30-Jan Keswick Reservoir Release Fall 2011 Winter ,372 9,000 3,000 6,000 7,500 4,500 Eggs and Fry in Gravel - 60 to 90 days CFS 30-Sep 30-Oct 30-Nov 30-Dec 30-Jan Keswick Reservoir Release Fall 2009 Winter ,250 9,000 3,000 6,000 7,500 4,500 Eggs and Fry in Gravel - 60 to 90 days CFS 30-Sep 30-Oct 30-Nov 30-Dec 30-Jan Keswick Reservoir Release Fall 2006 Winter ,000 3,000 6,000 7,500 4,500 Eggs and Fry in Gravel - 60 to 90 days CFS OctNovFebDecJan Fall-run Spawning Mar MONITORING AND ASSESSMENT Record when redd was created Mark and record accurate location of redd Ground/Boat Based redd survey Eggs and Fry in Gravel - 60 to 90 days OctNovFebDecJanMar Record dewatered redds and state of dewatering Map dewatered spawning areas DURING LOW-FLOW PERIODS Eggs and Fry in Gravel - 60 to 90 days OctNovFebDecJan Fall-run Spawning Mar DFG SURVEY Dewatered Redds Area Subject to Dewatering Mapped 2009/2010 Fall-run Redds Mapped 2011/2012 Area Subject to Dewatering Mapped 2009/2010 Topographic Survey to Determine Stage/Discharge Relationship Whats next?