Jack's Swamp Dam No. 2 dam
Jack's Swamp Dam No. 2
Jack's Swamp Dam No. 2, located in Canby, California, is a privately owned earth dam built in 1926 with a primary purpose of water supply for irrigation and other uses. Situated on the Tr Pit River, this dam stands at a height of 12 feet with a hydraulic height of 8 feet, providing a storage capacity of 1,013 acre-feet and covering a surface area of 457 acres. Despite its age, the dam is in satisfactory condition with a low hazard potential, as reported in the last inspection conducted in August 2019.
Managed by the California Department of Water Resources (DWR) under the Safety of Dams program, Jack's Swamp Dam No. 2 is subject to state regulation, inspection, and enforcement to ensure its structural integrity and safety. With a drainage area of 7.45 square miles, this dam plays a crucial role in maintaining water supply for the local community and agricultural activities in the region. Although no spillway type or maximum discharge information is provided, the dam's design and construction reflect the engineering practices of its time.
While lacking specific details on its spillway and locks, Jack's Swamp Dam No. 2 remains a significant water resource infrastructure in Modoc County, California, contributing to the sustainable management of water resources in the area. With its historical significance and ongoing regulatory oversight, this dam serves as a reminder of the importance of maintaining and monitoring aging infrastructure to ensure the safety and reliability of water supply systems in the face of changing climate 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 Jack's Swamp Dam No. 2 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Pit R Nr Canby Ca | 2 cfs | → |
| Sf Pit R Nr Likely Ca | 119 cfs | → |
| Pit R Bl Pit No 1 Ph Nr Fall River Mills Ca | 1,270 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Jack's Swamp Dam No. 2.
Boat launches
- Duncan North Boating Site
- Duncan South Boating Site
- Big Sage Road Modoc County
- Logan Slough Boating Site
- Green Springs Boating Site
Campgrounds
- Reservoir F
- Reservoir F Campground
- Reservoir C Campground
- Reservoir C
- Howard's Gulch Campground
- Howards Gulch
Fishing spots
Track Jack's Swamp Dam No. 2 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 Jack's Swamp Dam No. 2
Where does the data for Jack's Swamp Dam No. 2 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 Low 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 Jack's Swamp Dam No. 2.