Dam Report

Jefferson Lake Dam dam

Ohio, USA Town Fork Hazard High
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Tonight low
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Dam height
26ft
Hazard rating
High
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Jefferson Lake Dam -- None dam
Jefferson Lake Dam None · Town Fork
About this dam

Jefferson Lake Dam

Jefferson Lake Dam in Ohio is a state-regulated structure owned by the Department of Natural Resources and managed for recreational purposes. Built in 1934 by the US Department of Interior, National Park Service, this earth dam stands at a height of 25.5 feet with a storage capacity of 321 acre-feet and a maximum discharge of 1480 cubic feet per second. Situated on the Town Fork river in Hammondsville, the dam is crucial for flood control and water resource management in Jefferson County, Ohio.

Despite its high hazard potential, Jefferson Lake Dam is in satisfactory condition as per the last inspection in June 2019. The dam has a drainage area of 7.42 square miles, a surface area of 18 acres, and a normal storage capacity of 189 acre-feet. With its picturesque surroundings and recreational opportunities, this dam serves as a popular destination for outdoor enthusiasts, offering activities like fishing, boating, and picnicking. However, ongoing monitoring and maintenance are essential to ensure the safety and longevity of this vital water resource infrastructure.

As a focal point for water-based activities in the region, Jefferson Lake Dam plays a significant role in the community's social and economic well-being. With the potential to provide essential water supply, flood protection, and recreational opportunities, this dam stands as a testament to the importance of sustainable water resource management in the face of changing climatic conditions. As enthusiasts of water resources and climate resilience, understanding and appreciating the value of structures like Jefferson Lake Dam is crucial for promoting environmental stewardship and ensuring the long-term viability of our water systems.

StateNone
River / streamTown Fork
NID IDOH00497
Owner typeState
Primary purposeRecreation
Dam typeEarth
Year built1934
Dam height26 ft
Dam length236 ft
Max storage321 AF
Normal storage189 AF
Surface area18.0 ac
Drainage area7.4 sq mi
Hazard potentialHigh
ConditionSatisfactory
Last inspectionTue, 25 Jun 2019 00:00:00 GMT

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.
Detailed forecast

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.

Hourly detail

Next 5 days, hour by hour

Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.

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Deep dive

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.

TimeConditionTemp (°F)Snow (in)Rain (in)Humidity (%)Wind (mps)Wind dir
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Long-term outlook

15-day temperature & precipitation

Daily temperatures, snow, and rain projected over the next two weeks.

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Regional inflow

Nearby streamflow gauges

USGS streamgauges around Jefferson Lake Dam -- inflows here typically show up in storage 24-72 hours later.

Track Jefferson 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.

FAQ

About Jefferson Lake Dam

Where does the data for Jefferson 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 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.

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Manage alerts in the Snoflo app

Custom alerts are configured in the iOS app -- favorite this dam, set a threshold, and you'll get a push the moment conditions cross.

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