1 - Alaska Energy Data Inventory

LOCATION:SNETTISHAM PROJECT, ALASKACRATER LAKE PHASEPERTINENT DATANear the mouth of Speel River, 28 mi southeast of Juneau, Alaska.AUTHORIZED:Flood Control Act of 1962, providing for design and construction by theCorps of Engineers and for operation and maintenance by the Department ofthe Interior.PLAN:Construct an underground power conduit from the existing undergroundpowerhouse to Crater Lake. Install an additional turbine and generator inthe powerhouse.PROJECT FEATURES:NOTE:Datum.All elevations cited in this report are in feet and refer to ProjectMSL is 2.9 ft below Project Datum.Elevations of Tide Planes at Speel River with respect to Mean Lower LowWater and Project Datum are as follows:Highest Tide (Estimate)Mean Higher High WaterMean High WaterHalf Tide Level (MSL)Mean Low WaterMean Lower Low WaterLowest Tide (Estimate)MLLW22:""5"15.914.88.21.60.0-5.7PROJECT DATUM11.44.83.7-2.9-9.5-11 .1-16.8Tidal Datum Planes are based on 7 mo (1/65 to 8/65) of automatic gageoperation by USGS.Drainage area, mi2Annual runoff, minimum, acre-ftAnnual runoff, average, acre-ftAnnual runoff, maximum, acre-ftHydrology11.4113,000145,500186,750