Gahr Pond Dam 1 Reservoir Report
Nearby: Gahr Pond Dam 2 Gahr Pond Dam 3
Last Updated: December 22, 2025
Gahr Pond Dam 1, located in Jalapa, Illinois, was completed in 1976 by the USDA NRCS for the primary purpose of irrigation.
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Summary
This private dam stands at a height of 32 feet and spans 205 feet in length, with a storage capacity of 31 acre-feet. Situated on the TR-Macoupin Creek N river, this earth-filled dam plays a crucial role in water resource management within Macoupin County.
With a low hazard potential, Gahr Pond Dam 1 is regulated by the Illinois Department of Natural Resources and undergoes regular inspections and maintenance. The dam features a spillway width of 12 feet and a maximum discharge capacity of 100 cubic feet per second. In addition to its irrigation function, the dam also serves other purposes, contributing to the overall water management strategy in the region.
As a key structure in the St. Louis District, Gahr Pond Dam 1 is a significant component of the local water infrastructure. Its design and construction by the Natural Resources Conservation Service ensure its reliability in providing water for agricultural needs while also meeting regulatory requirements. Climate and water resource enthusiasts will find this dam's data and operational details fascinating in understanding its role in sustaining the local ecosystem.
Year Completed |
1976 |
Dam Length |
205 |
Dam Height |
32 |
River Or Stream |
TR- MACOUPIN CREEK N |
Primary Dam Type |
Earth |
Surface Area |
2 |
Drainage Area |
0.02 |
Nid Storage |
31 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
32 |
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.
Gahr Pond Dam 1