Shillapoo Lake Dikes Reservoir Report
Nearby: Petes Slough Malar Dam
Last Updated: December 13, 2025
Shillapoo Lake Dikes, located in Clark, Washington, were completed in 2007 by the US Army Corps of Engineers (USACE) with a primary purpose of serving as a Fish and Wildlife Pond.
°F
°F
mph
Wind
%
Humidity
Summary
These dikes are owned and regulated by the state of Washington, with the Washington Department of Ecology overseeing permitting, inspection, and enforcement. The dikes have a low hazard potential and a hydraulic height of 10 feet, providing storage capacity of 3190 acre-feet for the Lake River offstream.
The Earth-type dikes span a length of 7400 feet and have a maximum discharge capacity of 150 cubic feet per second. The dikes also have a normal storage capacity of 1115 acre-feet, contributing to wildlife habitat and flood control measures in the area. The condition of the dikes is currently not rated, but they are regularly inspected to ensure their safety and functionality. Overall, Shillapoo Lake Dikes serve an important role in managing water resources and supporting the local ecosystem in Washington state.
Year Completed |
2007 |
Dam Length |
7400 |
River Or Stream |
Lake River - offstream |
Primary Dam Type |
Earth |
Hydraulic Height |
10 |
Nid Storage |
3190 |
Structural Height |
10 |
Hazard Potential |
Low |
Nid Height |
10 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Shillapoo Lake Dikes
La Frambois Road, Vancouver