Hackamore Reservoir dam
Hackamore Reservoir
Hackamore Reservoir, located in Modoc, California, is a Federal-owned water resource managed by the USDA Forest Service. Completed in 1907, this Earth-type dam stands at 10 feet high and spans 375 feet in length, with a storage capacity of 410 acre-feet. The reservoir serves multiple purposes, including fire protection, livestock watering, and as a small fish pond, making it a crucial resource for the surrounding area.
With a drainage area of 20.7 square miles and a maximum discharge capacity of 402 cubic feet per second, Hackamore Reservoir plays a vital role in the local ecosystem's water management. The reservoir's spillway is uncontrolled, with a width of 30 feet, and its outlet gates are also uncontrolled. Despite being rated as having a significant hazard potential, the dam's condition assessment is currently not rated, highlighting the need for ongoing monitoring and maintenance to ensure its safety and functionality.
Water resource and climate enthusiasts will appreciate the historical significance and operational importance of Hackamore Reservoir, as well as the potential risks associated with its maintenance and management. As a key element in the region's water infrastructure, this reservoir serves as a critical resource for both human and ecological needs, making it essential to prioritize its upkeep and sustainability in the face of changing environmental conditions.
Dam data reference
Condition Assessment
- Satisfactory
- No 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.
- 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.
- 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.
Hazard Potential Classification
- High
- Dams 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, environmental 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.
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Hackamore Reservoir -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Pit R Nr Canby Ca | 1 cfs | → |
| Sf Pit R Nr Likely Ca | 163 cfs | → |
| Pit R Bl Pit No 1 Ph Nr Fall River Mills Ca | 1,210 cfs | → |
| Burney C A Burney Falls Nr Burney Ca | 168 cfs | → |
| Klamath Straits Drain Near Worden | 1 cfs | → |
| Ady Canal At Highway 97 | 6 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Hackamore Reservoir.
Boat launches
- Duncan South Boating Site
- Duncan North Boating Site
- Logan Slough Boating Site
- Big Sage Road Modoc County
Campgrounds
Fishing spots
Paddle runs
- Sally's Camp To Confluence With Willow Creek
- Wilcox Spring To Clear Lake National Wildlife Refuge Boundary
- Upper Pit River Canyon
- Begins Near Muck Valley To Ends Two Miles From The Fall River Valley
- Lower Pit River Canyon
- Begins Immediately Southwest Of Fall River Mills, Ca To It Flows Into Shasta Lake And The Sacramento River.
Track Hackamore Reservoir in the Snoflo app
Save this dam as a favorite and get the local NOAA / yr.no forecast plus regional flow context wherever you are.
About Hackamore Reservoir
Where does the data for Hackamore Reservoir come from?
Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.
What does the Significant hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Hackamore Reservoir.