Dam Safety

Dam Safety

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Our goal is to:
  • Protect Human Life and Property from Dam Failures.
  • Assure Proper Dam Construction, Operations and Maintenance.
Navigate using the menu to the left or by clicking a link.

Services We Provide for Dams We Regulate

Construction Services

  • Permit Process
  • Project Planning and Approval Guidance
  • Dam Design and Construction Guidance
  • Construction Inspections
  • Declaration of Construction Completion
  • Operation and Maintenance Plan
  • Simplified Emergency Action Plan

Inspection Services

  • Construction Inspections
  • Periodic Inspections.
  • Non-routine Inspections
  • Public Request Inspections

Emergency Response Services

  • Floods
  • Earthquakes
  • Acts of Terrorism
  • All Other Causes.

Services We Provide for Dams We Do NOT Regulate

Coordination Services
  • Federally-owned dams and/or
  • Hydropower dams.
SPOTLIGHT

FEES INCREASED
2009 Legislature approved an increase in dam inspection fees

INVENTORY OF DAMS
Report updated November 23, 2009

INSPECTIONS OF UNPERMITTED DAMS AND RESERVOIRS
Ecology continues inspections of unpermitted dams

TECHNICAL NOTE 3:
- Revised design storm calculations


Tumwater Falls Dam Click to enlarge.

December 2007 Storm Thurston County

Embankment Failure Click to enlarge.

A Dam Breach - Walla Walla County

Three Tainter Gates Click to enlarge.

Lake Whatcom Dam

Peak flow at Tahuya

Tahuya River Dam in Kitsap County