Hackamore Reservoir is an earth dam located in Modoc County, California, built in 1907. It carries a Significant hazard potential classification.
Dam profile
NID height · 10 ft10 ft tall and 375 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Hackamore Reservoir
The primary purpose of Hackamore Reservoir is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Usda Fs (federal).
The dam stands 10 feet tall and stretches 375 feet across, has a storage capacity of 410 acre-feet, and collects water from a drainage area of 20 square miles. Completed in 1907, the structure is over a century old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. The most recent inspection on record was 09/29/2015. That was over 11 years ago.
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Location
| State | California |
| County | Modoc |
| Coordinates | 41.55833, -121.13333 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 375 ft |
| Year Completed | 1907 (119 years old) |
Storage & Hydraulics
| NID Storage | 410 acre-ft |
| Normal Storage | 410 acre-ft |
| Drainage Area | 20 sq mi |
| Max Discharge | 402 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Usda Fs |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 09/29/2015 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CA10235 |
| Federal ID | CA10235 |
| More Info | State Dam Safety Program |