Pine Lake Dam Reservoir Report
Last Updated: December 5, 2025
Pine Lake Dam, also known as Westport Lake and Sand Lake, is a privately owned structure located in Decatur, Indiana.
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Summary
Completed in 1958, this earth dam stands at a height of 21 feet and serves primarily as a water supply source for the surrounding area. With a normal storage capacity of 43 acre-feet and a maximum storage of 65 acre-feet, Pine Lake Dam covers a surface area of 5 acres and drains a 0.2 square mile watershed.
Despite its low hazard potential, Pine Lake Dam is considered to be in poor condition, highlighting the need for maintenance and improvements. The dam lacks a spillway and outlet gates, presenting potential risks in the event of heavy rainfall or high water levels. The dam has been inspected infrequently, with the last assessment occurring in July 2016, underscoring the importance of regular monitoring and upkeep to ensure the safety and functionality of the structure.
As a key component of the local water supply infrastructure, Pine Lake Dam plays a crucial role in supporting both recreational activities and water distribution in the region. With a risk assessment rating of 2 (high), there is a pressing need for proactive risk management measures to be implemented to safeguard the surrounding community and environment. Despite its current challenges, Pine Lake Dam remains a vital resource for the area, emphasizing the importance of its maintenance and continued operation for future generations.
Year Completed |
1958 |
Dam Length |
284 |
Dam Height |
21 |
River Or Stream |
UNNAMED TRIBUTARY WYALOOSING CREEK |
Primary Dam Type |
Earth |
Surface Area |
5 |
Hydraulic Height |
21 |
Drainage Area |
0.2 |
Nid Storage |
65 |
Structural Height |
21 |
Outlet Gates |
None |
Hazard Potential |
Low |
Nid Height |
21 |
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.
Pine Lake Dam