Dunn Ranch dam
Dunn Ranch
Dunn Ranch, located in Anza, California, is a privately owned dam that serves as a crucial water supply infrastructure in Riverside County. Completed in 1987, this earth dam stands at a height of 44 feet and has a storage capacity of 90 acre-feet. It primarily caters to irrigation and water supply needs in the region, drawing water from the Tr Hamilton Creek.
Managed and regulated by the California Department of Water Resources (DWR) under the Safety of Dams program, Dunn Ranch has a high hazard potential but is currently assessed to be in satisfactory condition. With regular inspections and state oversight, the dam ensures the safety and reliability of its operations. The surrounding area of the dam covers a surface area of 7 acres and has a drainage area of 0.2 square miles.
Despite its critical role in water management, Dunn Ranch has not undergone significant modifications since its construction. It is essential for water resource and climate enthusiasts to recognize the importance of maintaining and monitoring such infrastructure to ensure the sustainable utilization of water resources in the face of changing environmental conditions and increasing water demands.
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 Dunn Ranch -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Palm Cyn C Nr Palm Springs Ca | · | → |
| Murray Cyn C Nr Palm Springs Ca | · | → |
| Deep C Nr Palm Desert Ca | · | → |
| Andreas C Nr Palm Springs Ca | 1 cfs | → |
| Tahquitz C Nr Palm Springs Ca | 2 cfs | → |
| Whitewater R A Rancho Mirage Ca | · | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Dunn Ranch.
Boat launches
- Anglers Landing, Mountain Center
- Vail Lake Boat Ramp
- Highway 76 26439, Santa Ysabel
- Warren Road 37701, Temecula
Campgrounds
Fishing spots
Paddle runs
- Palm Canyon
- Confluence Of Fry And Iron Spring Creeks (E1/2, Sec 3, T10s,R1e To Se1/4 Sec 16, T10s, R2e
- Forest Boundary, Above Zoo Creek Below Spillway (S1/2, Sec 3, T11s, R2e) To La Jolla Indian Reservation Boundary (N1/2, Sec 31, T10s, R2e)
- Mission Creek
- Santa Margarita River
Track Dunn Ranch 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 Dunn Ranch
Where does the data for Dunn Ranch 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 High 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 Dunn Ranch.