Lake Almanor

In 2000 and 2002, Sea Surveyor conducted a series of hydrographic surveys, subbottom profiling, and diving inspections in Lake Almanor, California at elevation 4,500’. The purpose for the surveys is to provide information for the engineering design of a proposed submerged intake canal to provide cold, deep lake water to sustain salmon migration in the Feather River. Specific tasks included:

• Class 1 Hydrographic Surveys near intake structures and proposed areas for canal.
• Detailed Hydrographic Surveys of all shallow areas (<30’ deep) for boater safety, including
identifying and mapping “hazards-to-navigation” and all aids-to-navigation (buoys).
• Class 2 Hydrographic Survey of Entire Lake for comparison against historical contour maps.
• Subbottom Profiling (Seismic Reflection) near intake structures and proposed areas for canal.
• Geotechnical Investigation of proposed areas for canal construction using diver jet-probes.
• Diving Inspection of 24 boat-launch ramps to determine the elevation of the bottom of ramp.
• Shoreline Erosion Study along 18-miles of the Lake to compare against historical records