Summary
This earth dam has a hydraulic height of 11 feet and a structural height of 10 feet, with a length of 410 feet. It has a normal storage capacity of 20 acre-feet and a maximum discharge of 725 cubic feet per second. The dam is state-regulated by the Washington Department of Ecology and has a low hazard potential, with a condition assessment that is currently not rated.
This dam plays a crucial role in protecting the surrounding area from flooding, as it helps manage water levels in Goose Creek. Its location in Lincoln County, Washington, under the jurisdiction of the state, ensures that it is subject to regular inspections, permitting, and enforcement to maintain its integrity and functionality. Despite not having a designated spillway type or width, Hansen Dam has been deemed to be in overall satisfactory condition and meets the necessary guidelines for emergency action plans.
Hansen Dam serves as a vital infrastructure for flood control in the region, providing a significant storage capacity of 56 acre-feet and covering a surface area of 20 acres. With its low hazard potential and state oversight, this dam stands as a key component in the water resource management system in Washington, contributing to the overall resilience of the area against potential climate-related challenges.
Year Completed |
1962 |
Dam Length |
410 |
River Or Stream |
Goose Creek |
Primary Dam Type |
Earth |
Surface Area |
20 |
Hydraulic Height |
11 |
Drainage Area |
12.1 |
Nid Storage |
56 |
Structural Height |
10 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
11 |
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.
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Hansen Dam