Pit #1 Diversion dam
Pit #1 Diversion
Pit #1 Diversion, located in Fall River Mills, California, is a privately owned structure that plays a crucial role in flood risk reduction and hydroelectric power generation along the Fall River. Completed in 1922, this gravity dam stands at a height of 15 feet and has a storage capacity of 50 acre-feet. With a low hazard potential and a satisfactory condition assessment, Pit #1 Diversion is regulated and inspected by the California Department of Water Resources to ensure its safety and effectiveness in managing water resources in the region.
Despite its age, Pit #1 Diversion continues to serve its primary purpose of flood risk reduction, showcasing the enduring engineering ingenuity that went into its design and construction nearly a century ago. With a drainage area of 676 square miles and a surface area of 9 acres, this dam plays a significant role in regulating water flow and mitigating potential flood events in the surrounding area. Additionally, its proximity to the Fall River makes it a vital component of the local water infrastructure, highlighting its importance in maintaining water security and ecological balance in the region.
As a key feature in the water management system of Shasta County, Pit #1 Diversion stands as a testament to the enduring impact of early 20th-century engineering on modern-day water resource management. With its historical significance, functional efficiency, and ongoing regulatory oversight, this gravity dam continues to play a crucial role in safeguarding communities and ecosystems against the threat of flooding while also supporting sustainable hydroelectric power generation in the region.
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.
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Pit #1 Diversion.
Campgrounds
- Pit River
- Inter-Mountain Fair Of Shasta County
- Dusty Camp
- Dusty Campground
- Pit River/Cassel
- Mcarthur - Burney Falls State Park
Fishing spots
Paddle runs
- Lower Pit River Canyon
- Begins Immediately Southwest Of Fall River Mills, Ca To It Flows Into Shasta Lake And The Sacramento River.
- Lower Horse Creek Canyon
- Begins 2.5 Miles West Of Little Valley, California To Juncture With The Pit River.
- Upper Pit River Canyon
- Begins Near Muck Valley To Ends Two Miles From The Fall River Valley
Track Pit #1 Diversion 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 Pit #1 Diversion
Where does the data for Pit #1 Diversion 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 Pit #1 Diversion.