Green Lake Dam dam
Green Lake Dam
Green Lake Dam, located in North Greenfield, Ohio, is a privately owned structure designed by Buckeye Engineering, Ltd. The dam was completed in 2002 and stands at a height of 25 feet with a length of 480 feet. Its primary purpose is for recreation, providing a maximum storage capacity of 371.3 acre-feet and a normal storage capacity of 253.9 acre-feet. The dam sits on an unnamed tributary to Mill Creek, with a low hazard potential and a satisfactory condition assessment as of November 2020.
Managed by the Department of Natural Resources in Ohio, Green Lake Dam is regulated, permitted, inspected, and enforced by the state authorities. The dam features a surface area of 42.9 acres and a drainage area of 0.28 square miles. With a maximum discharge rate of 270 cubic feet per second, the dam ensures the safety of the surrounding area in case of emergencies. The dam is not under the jurisdiction of the US Army Corps of Engineers and has not undergone any modifications since its completion.
Green Lake Dam offers a serene recreational spot for water resource and climate enthusiasts in Logan County, Ohio. With its picturesque setting and reliable structural integrity, the dam provides a safe and enjoyable environment for outdoor activities such as fishing, boating, and picnicking. Its low hazard potential and satisfactory condition assessment make it a popular destination for visitors seeking to connect with nature and enjoy the beauty of the surrounding landscape.
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 Green Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Mad River At West Liberty Oh - 03266560 | 29 cfs | → |
| Great Miami River Bl Indian Lake At Russells Pt Oh | 77 cfs | → |
| Bokengehalas Creek At De Graff Oh | 34 cfs | → |
| Scioto River At Larue Oh | 98 cfs | → |
| Mad River Near Urbana Oh | 126 cfs | → |
| Scioto River Near Prospect Oh | 263 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Green Lake Dam.
Boat launches
- Moundwood Boat Ramp
- Long Island Point
- Chippewa Marina
- Indian Lake State Park - Campground Ramp
- Lakeview Harbor Boat Ramp
- Kiser Lake State Park - Sailing Club
Track Green Lake 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 Green Lake Dam
Where does the data for Green Lake 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 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 Green Lake Dam.