Joshua Crosby dam
Joshua Crosby
Joshua Crosby, located in Mohave, Arizona, is a private irrigation dam designed by the USDA NRCS and regulated by the Arizona Department of Water Resources. Completed in 1944, this earth dam stands at a height of 14 feet and spans 365 feet in length, with a storage capacity of 104 acre-feet. The dam serves the primary purpose of irrigation along the Langs Wash - OS river system.
With a low hazard potential and a moderate risk assessment rating, Joshua Crosby has not been inspected since September 2006, with a scheduled inspection frequency of 5 years. The dam features an uncontrolled spillway and outlet gates, and is situated in St. George, Utah. While its condition assessment is currently not rated, the dam's risk management measures and emergency action plan status remain unspecified.
For water resource and climate enthusiasts, Joshua Crosby presents an intriguing case study of a privately owned irrigation dam in the desert landscape of Arizona, highlighting the importance of sustainable water management practices and regulatory oversight. As a vital piece of infrastructure in the region, understanding the operational and maintenance aspects of dams like Joshua Crosby is crucial for ensuring the safety and efficiency of water resource utilization in arid environments.
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 Joshua Crosby -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Havasu Creek Abv Mouth Nr Supai | 65 cfs | → |
| Havasu Creek At Supai | 76 cfs | → |
| Kanab Creek Abv Mouth Nr Supai | 5 cfs | → |
| Fort Pearce Wash Near St. George | · | → |
| Colorado River Above Diamond Creek Nr Peach Spring | 7,630 cfs | → |
| Diamond Creek Near Peach Springs | 3 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Joshua Crosby.
Paddle runs
- Begins 0.5 Miles Upstream From The Confluence With The Colorado River C To Confluence With The Colorado River
- Headwaters Of The Northern Most Upper Drainage To Confluence With The Colorado River
- Begins 1.5 Miles Upstream From Confluence With The Colorado River To Confluence With The Colorado River
- Begins 0.5 Miles Upstream From The Confluence With The Colorado River To Confluence With The Colorado River
- Southern Boundary Of Grand Canyon National Park To Confluence With The Colorado River
- Begins 2 Miles Upstream From Confluence With The Colorado River To Confluence With The Colorado River
Track Joshua Crosby 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 Joshua Crosby
Where does the data for Joshua Crosby 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 Joshua Crosby.