Tappan Dam dam
Tappan Dam
Tappan Dam, also known as Tappan Lake, is a federally owned structure located in Ohio's Harrison County. Completed in 1936 by the US Army Corps of Engineers, this earth-type dam serves primarily for flood risk reduction along Little Stillwater Creek. With a hydraulic height of 45 feet and a structural height of 52 feet, the dam spans 1550 feet and has a storage capacity of 61,600 acre-feet.
Despite its high hazard potential, Tappan Dam is equipped with an emergency action plan, updated regularly by the US Army Corps of Engineers, to manage flood risks effectively. The dam releases water to adjust levels upstream and downstream, safeguarding its structural integrity. The Corps actively collaborates with local emergency managers and the public to enhance dam awareness and preparedness for potential emergencies. Through constant monitoring and maintenance, the Corps ensures the dam's proper functioning and mitigates risks associated with severe weather events.
In conclusion, Tappan Dam stands as a crucial structure for flood control in Ohio, demonstrating the US Army Corps of Engineers' commitment to safeguarding water resources and enhancing community resilience against dam-related emergencies.
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 Tappan Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Stillwater Creek At Tippecanoe Oh | 121 cfs | → |
| Brushy Fork Near Tippecanoe Oh | 36 cfs | → |
| Mcguire Creek Near Leesville Oh | 42 cfs | → |
| Stillwater Creek At Piedmont Oh | 73 cfs | → |
| Boggs Fork At Piedmont Oh | 17 cfs | → |
| Indian Fork Bl Atwood Dam Near New Cumberland Oh | 109 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Tappan Dam.
Boat launches
- Tappan Park Launch Ramp
- County Rd 6 Ramp
- Atwood Lake Boat Launch
- Reynolds Road Launch Ramp
- Kirkwood Ramp
- Salt Fork State Park - Rocky Fork Access
Campgrounds
- Petersburg Boat Landing
- Atwood Lake Campground (Main Gate)
- Abc Country Camping And Cabins
- Harrison Hills Campground
- Jefferson Lake State Park
- Pride Valley Campgrounds
Track Tappan Dam 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 Tappan Dam
Where does the data for Tappan Dam 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 Tappan Dam.