Long Bell Mill Pond Dam Reservoir Report
Nearby: Swofford Pond Mossyrock
Last Updated: December 14, 2025
Long Bell Mill Pond Dam, located in Lewis County, Washington, was completed in 1943 and serves multiple purposes including fire protection, stock, and a small fish pond.
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Summary
The dam is classified as an earth dam with a hydraulic height of 18 feet and a structural height of 11 feet, spanning a length of 2000 feet. The reservoir has a storage capacity of 65 acre-feet and covers a surface area of 14 acres, with a drainage area of 7.5 square miles. Despite its low hazard potential, the dam is regulated by the Washington Department of Ecology and undergoes regular inspections.
Situated on Winston Creek, Long Bell Mill Pond Dam is owned privately and falls under the jurisdiction of the state of Washington. The dam has not been modified in recent years and is currently in a not rated condition. While it has not experienced any major incidents, the dam does not have an emergency action plan in place. With its proximity to residential areas, it is crucial for stakeholders to ensure that the dam is properly maintained and monitored to prevent any potential risks or hazards to the surrounding community.
Overall, Long Bell Mill Pond Dam plays a vital role in providing water resources for various purposes in the region. As a climate and water resource enthusiast, understanding the dam's history, design characteristics, and regulatory oversight can offer valuable insights into the management and conservation of this essential infrastructure. By staying informed and advocating for responsible dam maintenance and inspection practices, enthusiasts can contribute to the sustainability and resilience of water resources in the area.
Year Completed |
1943 |
Dam Length |
2000 |
River Or Stream |
Winston Creek |
Primary Dam Type |
Earth |
Surface Area |
14 |
Hydraulic Height |
18 |
Drainage Area |
7.5 |
Nid Storage |
65 |
Structural Height |
11 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
18 |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Mossyrock Park - Tacoma Power
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Main Campground
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S'mores Loop
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Riffe Lake Campground
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Mayfield Lake - Tacoma Power
|
||
Ike Kinswa State Park
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Long Bell Mill Pond Dam