O'Shaughnessy dam
O'Shaughnessy
O'shaughnessy is a gravity dam located in Dublin, Ohio, along the Scioto River. Completed in 1924, this dam serves multiple purposes including hydroelectric power generation, recreation, and water supply. With a height of 75 feet and a length of 1510 feet, O'shaughnessy has a storage capacity of 33,000 acre-feet and a surface area of 950 acres.
Managed by the Federal Energy Regulatory Commission, O'shaughnessy is regulated by the Department of Natural Resources in Ohio. It has a high hazard potential and a moderate risk assessment rating. The dam features an uncontrolled spillway with a width of 802 feet and a maximum discharge capacity of 261,000 cubic feet per second.
Despite its age, O'shaughnessy continues to play a vital role in providing water supply and other benefits to the local community. Its location in Concord Township, Delaware County, makes it a key feature in the region's water resource infrastructure, attracting water resource and climate enthusiasts alike.
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 O'Shaughnessy -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Scioto River Below O Shaughnessy Dam Nr Dublin Oh | 481 cfs | → |
| Olentangy River Near Worthington Oh | 676 cfs | → |
| Mill Creek Near Bellepoint Oh | 61 cfs | → |
| Alum Creek At Africa Oh | 12 cfs | → |
| Scioto River At 5th Ave At Columbus Oh | 514 cfs | → |
| Olentangy River At J H Herrick Dr At Columbus Oh | 455 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near O'Shaughnessy .
Boat launches
- Twin Lakes Boat Ramp
- Riverside Drive Concord Township
- Griggs Reservoir - Marina
- Berlin Township
- Alum Creek State Park - New Galena
- Alum Creek State Park - Cheshire
Campgrounds
Track O'Shaughnessy 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 O'Shaughnessy
Where does the data for O'Shaughnessy 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 O'Shaughnessy .