Lone Pine dam
Lone Pine
Lone Pine is a key flood risk reduction structure located in Schoens Dam, Navajo, Arizona. Built in 1936, this earth dam stands at a height of 98 feet and spans 900 feet in length, with a storage capacity of 14,700 acre-feet along Show Low Creek. Despite its low hazard potential, Lone Pine plays a crucial role in safeguarding the surrounding area from potential flooding events, with a maximum discharge capacity of 15,000 cubic feet per second.
Managed by the Arizona Department of Water Resources, Lone Pine undergoes regular inspections to ensure its structural integrity and functionality. The dam's satisfactory condition assessment in 2015 highlights its reliability in flood risk mitigation. With a moderate risk assessment rating, this structure is equipped with uncontrolled spillways and a spillway width of 360 feet to manage excess water flow effectively. In the event of an emergency, the dam's risk management measures are in place to mitigate potential hazards and ensure public safety.
Water resource and climate enthusiasts can appreciate the role of Lone Pine in protecting the community from flooding and maintaining water storage capacity in the region. As a vital piece of infrastructure in Arizona's water management system, this earth dam exemplifies the importance of proactive risk assessment and maintenance to ensure the continued safety and efficiency of water resource structures.
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 Lone Pine -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Show Low Creek Near Lakeside | 0 cfs | → |
| Carrizo Creek Near Show Low | 0 cfs | → |
| Little Colorado River At Woodruff | · | → |
| Little Colorado River At Holbrook | 472 cfs | → |
| Little Colorado R Blw Zion Res Nr St. Johns | · | → |
| Little Colorado River Near Joseph City | 504 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Lone Pine.
Boat launches
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Campgrounds
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Fishing spots
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River runs
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About Lone Pine
Where does the data for Lone Pine 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 below 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.
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.