H-V Reservoir dam
H-V Reservoir
Located in Lyman State Park in Apache, Arizona, the H-V Reservoir is a privately owned structure regulated by the Arizona Department of Water Resources. Originally completed in 1883 for irrigation purposes, this earth dam stands at 15.4 feet high with a storage capacity of 260 acre-feet. With a surface area of 50.6 acres and a spillway width of 67 feet, the reservoir serves as a vital resource for managing water resources in the region.
The H-V Reservoir, situated along Coyote Creek, has a low hazard potential and is classified as having a moderate risk level. Despite not being rated for its condition, the reservoir undergoes inspections every five years to ensure its structural integrity. While no emergency action plan or inundation maps are currently in place, the reservoir plays a crucial role in supporting agricultural activities and sustaining water supply in the area. With its historical significance and ongoing regulatory oversight, the H-V Reservoir remains a valuable asset for water resource and climate enthusiasts interested in understanding the intersection of infrastructure and environmental stewardship.
As one of the oldest dams in Arizona, the H-V Reservoir serves as a testament to the state's long-standing commitment to water management. With its earth dam design and uncontrolled spillway, the reservoir stands as a key example of early irrigation infrastructure in the region. While its risk level is moderate, the reservoir's low hazard potential reflects the careful maintenance and regulatory oversight it receives. For those passionate about water conservation and climate resilience, the H-V Reservoir offers a fascinating case study in balancing agricultural needs with sustainable resource management practices.
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 H-V Reservoir -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Nutrioso Cr. Ab. Nelson Res Nr Springerville | 0 cfs | → |
| Filler Ditch At Greer | 1 cfs | → |
| Little Colorado River At Greer | 1 cfs | → |
| Little Colorado R Abv Lyman Lake Nr St. Johns | 0 cfs | → |
| San Francisco River Near Reserve | 3,350 cfs | → |
| Little Colorado R Blw Salado Springs | · | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near H-V Reservoir.
Campgrounds
- Alpine Divide
- Alpine Divide Campground
- Luna Lake Campground
- Luna Lake
- Luna Lake Group Campground
- Head Of The Ditch Campground
Fishing spots
- Nelson Reservoir
- Hulsey Lake Fishing Site
- San Francisco River
- Luna Lake
- River Reservoir South Fishing Site
- Bunch Reservoir
Paddle runs
- 1/2 Mile Below Crosby Crossing To Confluence With Boneyard Creek
- 1/2 Mile Above Crosby Crossing To 1/2 Mile Below Crosby Crossing
- Confluence With Coyote Creek To 1/4 Mile Above Diamond Rock Campground
- Confluence With Boneyard Creek To Confluence With Coyote Creek
- South Fork Little Colorado River
- 1/4 Mile Above Diamond Rock Campground To Confluence With West Fork Black River
More reservoirs
Track H-V Reservoir 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 H-V Reservoir
Where does the data for H-V Reservoir 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 H-V Reservoir.