Howard A. Hanson Dam and Reservoir

Project Description

• Stream: Green River
• Location: Palmer, Washington
• Type of Project: Storage
• Authorized Purpose: Flood Control
• Other Uses: Domestic and Industrial Water Supply, Fish Flow Augmentation, In-Stream Water Quality

Hydrologic Data

• Drainage area = 220 sq mi
• Maximum outflow (regulated) = 12,200 cfs (1961)
• Reservoir Elevation (NGVD29)
  Full pool = 1,206.0 ft
  Conservation pool = 1,141.0 ft
  Minimum pool = 1,035.0 ft
• Usable storage (1,035.0 to 1,206.0) = 106,000 AF
• Conservation storage (1,035.0 to 1,141.0) = 25,000 AF

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