Mormon Flat dam
Mormon Flat
Mormon Flat Dam, located on the Salt River in Maricopa County, Arizona, is a federal hydroelectric facility managed by the Bureau of Reclamation. Completed in 1924, this concrete dam stands at a height of 224 feet and serves multiple purposes, including hydroelectric power generation and irrigation. With a storage capacity of 57,852 acre-feet and a surface area of 950 acres, Mormon Flat Dam plays a crucial role in water resource management in the region.
The dam's controlled spillway and high hazard potential underscore the importance of regular inspections and risk assessments. Despite its age, Mormon Flat Dam continues to operate under the oversight of the Bureau of Reclamation, ensuring its structural integrity and safety. The dam's location within the Los Angeles District of the US Army Corps of Engineers further emphasizes its significance in water management and climate resilience efforts in Arizona.
As a key component of the region's water infrastructure, Mormon Flat Dam represents a blend of historical engineering achievements and ongoing efforts to adapt to changing climate conditions. Its role in providing water for irrigation and electricity generation highlights the intersection of water resource management and climate resilience, making it a focal point for enthusiasts interested in sustainable water practices and the impact of climate change on infrastructure.
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 Mormon Flat -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Salt River Blw Stewart Mountain Dam | 652 cfs | → |
| Sycamore Creek Near Fort Mcdowell | · | → |
| Verde River Near Scottsdale | 106 cfs | → |
| Queen Creek Below Whitlow Dam Nr Superior | 1 cfs | → |
| Verde River Blw Bartlett Dam | 144 cfs | → |
| Pinto Creek Near Miami | 1 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Mormon Flat.
Boat launches
- Apache Trail Maricopa County
- Laguna Boat Ramp
- East Saguaro Del Norte Road Maricopa County
- East Saguaro Del Norte Road 469, Maricopa County
- Rafter Take-Out Parking
- Apache Lake Maricopa County
Campgrounds
- The Point
- Canyon Lake Campground
- The Point Boat Dock, Campground And Picnic Area
- Bagley Flat Campground And Boat Dock
- Bagley Flat
- Tortilla Campground
Fishing spots
Paddle runs
- Boundary Of The Primary Jurisdiction Below Stewart Mountain Dam To Salt River Indian Reservation Boundary
- Lower Salt
- Salt River Indian Reservation Boundary To Immediately Above Granite Reef Dam Impoundment
- Lower Verde
- Telegraph Creek - Forest Road #4 To Confluence With Arnett Creek
- Arnett Creek - Forest Road #4 To Middle Of Sec 7,T2s, R12e
Track Mormon Flat 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 Mormon Flat
Where does the data for Mormon Flat 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 Mormon Flat.