Summary
Completed in 1972, this earth dam stands at a height of 63 feet, with a hydraulic height of 58 feet, and a length of 550 feet. The reservoir has a storage capacity of 887 acre-feet, serving as a vital water source for the surrounding community in Hayfork.
Despite its high hazard potential, Ewing Reservoir is currently in satisfactory condition, with the last inspection conducted in May 2020. The dam is designed to withstand potential risks, and emergency action plans are in place to ensure the safety of the area in case of any unforeseen events. The reservoir is situated along Ewing Gulch, with a drainage area of 0.69 square miles, providing a surface area of 43 acres for water storage. Congressman Jared Huffman represents the area in the Sacramento District, where Ewing Reservoir plays a crucial role in water management and supply.
As a significant water supply source in the region, Ewing Reservoir serves as a lifeline for the community, ensuring water security and sustainability in Trinity County, California. With state-regulated oversight and regular inspections, the dam continues to provide essential services while adhering to safety standards set by the DWR. Climate enthusiasts and water resource experts can appreciate the critical role that Ewing Reservoir plays in managing water resources and mitigating potential risks in the face of changing environmental conditions.
Year Completed |
1972 |
Dam Length |
550 |
Dam Height |
63 |
River Or Stream |
Ewing Gulch |
Primary Dam Type |
Earth |
Surface Area |
43 |
Hydraulic Height |
58 |
Drainage Area |
0.69 |
Nid Storage |
887 |
Hazard Potential |
High |
Nid Height |
63 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Trinity R A Douglas City Ca
|
2200cfs |
Trinity R A Junction City Ca
|
2310cfs |
Trinity R Ab Nf Trinity R Nr Helena Ca
|
2830cfs |
Indian C Nr Douglas City Ca
|
85cfs |
Trinity R Bl Limekiln Gulch Nr Douglas City Ca
|
1950cfs |
Nf Trinity R A Helena Ca
|
47cfs |
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 |
|---|---|---|
Philpot
|
||
Sheill Gulch
|
||
Shiell Gulch Campground
|
Ewing
Nine Mile Bridge To Confluence With South Fork Trinity River