Miller Pond Dam 1 Reservoir Report
Last Updated: December 22, 2025
Miller Pond Dam 1, located in Jalapa, Illinois, is a privately owned structure designed by the USDA NRCS and regulated by the Illinois Department of Natural Resources.
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Summary
Completed in 1977, this earth dam stands at a height of 30 feet and spans 250 feet in length, with a storage capacity of 61 acre-feet. The dam serves a primary purpose of "Other" and is classified as a low hazard potential structure.
With a drainage area of 0.06 square miles and a maximum discharge capacity of 316 cubic feet per second, Miller Pond Dam 1 plays a crucial role in managing water resources in the area. Despite a moderate risk assessment rating of 3, the dam's condition assessment is currently listed as "Not Available," highlighting the need for continued monitoring and maintenance. The dam features an uncontrolled spillway and outlet gates, with a spillway width of 42 feet.
Ensuring the safety and integrity of Miller Pond Dam 1 is essential for protecting the surrounding community and environment. With its strategic location along TR- Macoupin Creek NE, this dam represents a key component of the water infrastructure in Macoupin County, Illinois. As climate change continues to impact water resources, maintaining and regulating structures like Miller Pond Dam 1 will be crucial for sustainable water management in the region.
Year Completed |
1977 |
Dam Length |
250 |
Dam Height |
30 |
River Or Stream |
TR- MACOUPIN CREEK NE |
Primary Dam Type |
Earth |
Surface Area |
3 |
Drainage Area |
0.06 |
Nid Storage |
61 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
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 1