Miller Pond Dam 2 Reservoir Report
Last Updated: December 22, 2025
Miller Pond Dam 2, located in Jalapa, Illinois, is a privately owned structure constructed in 1973 by the USDA NRCS.
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Summary
This earth dam stands at a height of 28 feet and spans 200 feet in length, with a maximum storage capacity of 46 acre-feet. The dam serves multiple purposes, including flood control and water storage for the Macoupin Creek NE watershed. Despite its low hazard potential, the dam is regulated by the Illinois Department of Natural Resources and undergoes regular inspections to ensure its structural integrity.
The dam features an uncontrolled spillway with a width of 40 feet and has a moderate risk assessment rating of 3. While the condition assessment is currently unavailable, the dam's risk management measures are not specified. The surrounding area encompasses a surface area of 4 acres and a drainage area of 0.09 square miles. With a maximum discharge capacity of 351 cubic feet per second, the dam plays a crucial role in managing water resources in the region. Overall, Miller Pond Dam 2 serves as a vital component in the water infrastructure of Macoupin County, Illinois, contributing to the overall resilience of the local ecosystem in the face of changing climate conditions.
Year Completed |
1973 |
Dam Length |
200 |
Dam Height |
28 |
River Or Stream |
TR- MACOUPIN CREEK NE |
Primary Dam Type |
Earth |
Surface Area |
4 |
Drainage Area |
0.09 |
Nid Storage |
46 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
28 |
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.
Miller Pond Dam 2