Coon Camp Reservoir Report
Nearby: Branham Flat Fredonia
Last Updated: December 5, 2025
Coon Camp is a privately owned dam located in Lassen, California, specifically near the Swickard Ranch house.
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Summary
This earth dam, completed in 1900, stands at a height of 23 feet and serves primarily for water supply purposes, including irrigation. It holds a storage capacity of 548 acre-feet and covers a surface area of 79 acres, drawing water from the Tr Horse Lake river or stream.
Managed by the California Department of Water Resources (DWR) under the Safety of Dams program, Coon Camp has been classified as a low hazard potential structure with a satisfactory condition assessment as of September 2017. Despite its age, regular inspections are conducted, with the last one taking place in October 2019. The dam is designed to handle normal discharges and is equipped with necessary safety features, although specific spillway details are not provided in the data. The surrounding area is deemed to be at a low risk, with no emergency action plan (EAP) currently in place.
Coon Camp serves as a vital water resource infrastructure in the region, ensuring a stable water supply for agricultural and domestic needs. Its historical significance and ongoing maintenance efforts underscore the importance of managing such structures to safeguard water resources and mitigate potential risks associated with aging infrastructure. For water resource and climate enthusiasts, Coon Camp represents a piece of California's water management history, intertwining engineering ingenuity with environmental stewardship for a sustainable future.
Year Completed |
1900 |
Dam Length |
1175 |
Dam Height |
23 |
River Or Stream |
Tr Horse Lake |
Primary Dam Type |
Earth |
Surface Area |
79 |
Hydraulic Height |
18 |
Drainage Area |
18.1 |
Nid Storage |
548 |
Hazard Potential |
Low |
Nid Height |
23 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Sf Pit R Nr Likely Ca
|
7cfs |
Hat C Nr Hat Creek Ca
|
141cfs |
Pit R Nr Canby Ca
|
56cfs |
Spanish C Ab Blackhawk C At Keddie Ca
|
57cfs |
Pit R Bl Pit No 1 Ph Nr Fall River Mills Ca
|
1470cfs |
Spanish C A Quincy Ca
|
30cfs |
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.
Coon Camp