Painted Rock Dam dam
Painted Rock Dam
Located on the Gila River in Maricopa, Arizona, the Painted Rock Dam is a Federal-owned structure primarily designed for flood risk reduction. Completed in 1960 by the US Army Corps of Engineers, this earth dam stands at a height of 181 feet and has a storage capacity of 4,831,500 acre-feet. The dam's spillway, with a width of 610 feet, is uncontrolled, and the risk assessment conducted in 2021 identified the project as having a moderate risk of failure, primarily due to the potential overtopping of the embankment.
In response to the identified risks, the US Army Corps of Engineers has implemented various risk management measures to ensure public safety and minimize the consequences of a potential dam failure. These measures include working closely with state and local emergency managers, conducting emergency exercises, monitoring rainfall forecasts, engaging with local communities to enhance flood preparedness, and regularly inspecting and monitoring the dam's condition. Additionally, plans are in place for further studies to evaluate and quantify existing risks, along with updates to the Emergency Action Plan and coordination with first responders to improve risk communication and response strategies. With a high hazard potential and the potential to impact up to one million people, the Painted Rock Dam remains a critical structure requiring vigilant monitoring and proactive risk management efforts.
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 Painted Rock Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Gila River Below Painted Rock Dam | · | → |
| Enterprise Canal At Gillespie Dam | 9 cfs | → |
| Gila Bend Canal At Gillespie Dam | 40 cfs | → |
| Gila R Blw Gillespie Dam | 6 cfs | → |
| Centennial Wash At Southern Pacific Railroad Brdg | · | → |
| Hassayampa River Near Arlington | 49 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Painted Rock Dam.
Track Painted Rock Dam 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 Painted Rock Dam
Where does the data for Painted Rock Dam 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 Painted Rock Dam.