Cholla Fly Ash Pond dam
Cholla Fly Ash Pond
Cholla Fly Ash Pond, located in Joseph City, Arizona, is a vital water resource managed by a public utility. This pond, completed in 1978, serves as a storage facility with a capacity of 18,000 acre-feet and a surface area of 430 acres. Situated along the Little Colorado River, it plays a crucial role in water management in the region.
Despite its significant role in water storage, the Cholla Fly Ash Pond has a high hazard potential and is subject to regular inspections and enforcement by the Arizona Department of Water Resources. The dam, primarily made of earth with stone core and rock-soil foundations, stands at a height of 80 feet and spans a length of 4565 feet. With a drainage area of 2.47 square miles, this structure is designed to withstand high-risk scenarios, making it a key asset in water resource management in Navajo County.
The condition assessment of the Cholla Fly Ash Pond is rated as satisfactory, with a risk assessment of high. Its emergency action plan and risk management measures are still being developed, highlighting the ongoing efforts to ensure the safety and reliability of this critical water infrastructure. As climate change continues to impact water resources, the Cholla Fly Ash Pond remains a key component in the sustainable management of water 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.
Nearby streamflow gauges
USGS streamgauges around Cholla Fly Ash Pond -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Little Colorado River Near Joseph City | 2,700 cfs | → |
| Little Colorado River At Holbrook | 51 cfs | → |
| Little Colorado River At Woodruff | · | → |
| Little Colorado River Near Winslow | 3 cfs | → |
| Jacks Canyon Cr Nr Winslow | · | → |
| Chevelon Fork Below Wildcat Canyon | · | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Cholla Fly Ash Pond.
Campgrounds
Fishing spots
Paddle runs
- Eastern Boundary Of Park (Original Park Boundary) To Western Boundary Of Park (Original Park Boundary)
- 1/4 Mile Below Forest Road 504 Crossing To Forest Boundary In Section 1, T14n, R15e, Gila And Salt River Meridian
- 0.1 Miles Above Diversion At Durfee Crossing To 1/4 Mile Below Forest Road 504 Crossing
- 1/4 Mile Below Chevelon Lake Dam To 0.1 Miles Above Diversion At Durfee Crossing
- 1/4 Mile Below Wiggins Crossing To Confluence With Clear Creek
- Confluence Of Woods Canyon And Chevelon Creek To South End Of Chevelon Lake
Track Cholla Fly Ash Pond 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 Cholla Fly Ash Pond
Where does the data for Cholla Fly Ash Pond 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 Cholla Fly Ash Pond.