Percy Harry dam
Percy Harry
Percy Harry is a private earth dam located in Dewey, Oklahoma, with a height of 34 feet and a storage capacity of 56 acre-feet. Completed in 1980, this dam serves multiple purposes and is regulated by the Oklahoma Water Resources Board. Situated on TR-ONE HORSE CR, it plays a crucial role in water resource management in the region, with a drainage area of 320 square miles and a surface area of 2 acres.
Despite being rated as "Not Rated" in terms of condition assessment, Percy Harry is classified as having a very high risk potential, highlighting the importance of regular inspections and maintenance. The dam features a controlled spillway and is equipped with a valve outlet gate for water control. Although the hazard potential is currently undetermined, the dam's risk management measures and emergency action plans are essential for ensuring the safety of the surrounding community in the event of a flood or other emergency.
With its strategic location and significant storage capacity, Percy Harry is a key component of the water infrastructure in Dewey, Oklahoma. As a privately-owned structure, it is subject to state regulations and inspections to maintain its integrity and functionality. Climate and water resource enthusiasts can appreciate the vital role this dam plays in managing water resources and mitigating flood risks 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 Percy Harry -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| North Canadian River Blw Weavers Ck Nr Watonga | 12 cfs | → |
| North Canadian River Near Seiling | 28 cfs | → |
| Washita River Near Clinton | 19 cfs | → |
| Washita River Near Foss | 4 cfs | → |
| Washita River Near Hammon | 3 cfs | → |
| Canadian River At Bridgeport | 71 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Percy Harry.
Track Percy Harry 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 Percy Harry
Where does the data for Percy Harry 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 Undetermined 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 Percy Harry.