Hydrogeologic data for the Eagle River-Chugiak area, Alaska

Water for the Eagle River-Chugiak area is provided by private, subdivision and trailer court wells. Data from these wells were stud-ied to determine aquifer materials, yield, well depth and depth to water.

The aquifer material is unconsolidated glacial or alluvial gravel and sand and bedrock from the McHugh Complex, the unnamed metamorphic complex and the Kenai Formation. The median well yield for bedrock wells is 2 gallons per minute and the median well yield for wells completed in unconsolidated aquifers is 10 gallons per minute. Well depths may vary widely where wells are drilled into bedrock or glacial till but are more uniform where wells are drilled into alluvial gravels and sand. A continuous water table is not defined in the Eagle River-Chugiak area.