Mirror Lake Dam dam
Mirror Lake Dam
Mirror Lake Dam, located in Weymouth, Ohio, is a privately owned structure that serves as a key recreational spot in the area. Completed in 1950, this earth dam stands at a height of 25.5 feet and has a storage capacity of 59.1 acre-feet. With a low hazard potential and fair condition assessment, the dam is regulated, permitted, inspected, and enforced by the Ohio Department of Natural Resources to ensure its safety and compliance with state regulations.
Situated on a tributary to Granger Ditch, Mirror Lake Dam not only provides recreational opportunities but also contributes to the conservation and management of water resources in the region. Its normal storage capacity of 34.7 acre-feet and maximum discharge of 470 cubic feet per second make it an essential component of the local hydrological system. Despite its age, the dam continues to play a vital role in water management and climate resilience efforts in Medina County, Ohio.
With a surface area of 6.5 acres and a drainage area of 0.4 square miles, Mirror Lake Dam is a significant feature in the landscape, offering both leisure activities and environmental benefits. As climate change impacts continue to affect water resources, the importance of well-maintained structures like this dam becomes increasingly clear. By adhering to state regulations and undergoing regular inspections, Mirror Lake Dam remains a valuable asset for 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 Mirror Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Cuyahoga River At Old Portage Oh | 442 cfs | → |
| Cuyahoga River At Jaite Oh | 722 cfs | → |
| Chippewa Creek In Chippewa Met Pk Near Brecksville | 7 cfs | → |
| East Branch Rocky River Near Strongsville Oh | 30 cfs | → |
| Brandywine Creek Near Macedonia Oh | 5 cfs | → |
| Baldwin Creek At Strongsville Oh | 2 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Mirror Lake Dam.
Boat launches
- Chippewa Lake Boat Launch
- Portage Lakes State Park - Long Lake
- Portage Lakes State Park - North Reservoir
- Portage Lakes State Park - Turkeyfoot
- Old State Park
- Hudson Springs Park
Campgrounds
Fishing spots
Paddle runs
Track Mirror 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 Mirror Lake Dam
Where does the data for Mirror 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 Mirror Lake Dam.