Ollo Lake Dam Reservoir Report
Last Updated: December 5, 2025
Ollo Lake Dam, located in Franklin, Indiana, was completed in 1994 and serves as a recreational spot for water resource and climate enthusiasts.
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Summary
The dam is privately owned and regulated by the Indiana Department of Natural Resources, with a primary purpose of creating a fish and wildlife pond for recreational activities. The dam is classified as an Earth dam, with a height of 44 feet and a length of 300 feet, holding a maximum storage capacity of 7 acre-feet.
Despite its recreational value, Ollo Lake Dam poses a high hazard potential due to its poor condition, as assessed in 2007. The dam has an uncontrolled spillway and is situated on an unnamed tributary of Salt Creek, with a moderate risk assessment rating. Emergency action plans and risk management measures for the dam are not currently available, highlighting the need for increased monitoring and maintenance to ensure the safety of the surrounding community and environment. With its scenic location and potential risks, Ollo Lake Dam presents a complex and intriguing case study for water resource and climate enthusiasts to explore.
Year Completed |
1994 |
Dam Length |
300 |
Dam Height |
44 |
River Or Stream |
UNNAMED TRIBUTARY SALT CREEK |
Primary Dam Type |
Earth |
Surface Area |
2.23 |
Drainage Area |
0.02 |
Nid Storage |
7 |
Outlet Gates |
None |
Hazard Potential |
High |
Foundations |
Rock, Soil |
Nid Height |
44 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
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. Investigations and studies are necessary.
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.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams 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, environment 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.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Ollo Lake Dam