Greenfield City Dam Reservoir Report
Last Updated: December 21, 2025
Greenfield City Dam, also known as Greenfield Rives Lake, is a vital water supply infrastructure owned by the local government in Greene, Illinois.
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Summary
Completed in 1959, this Earth-type dam stands at a height of 33 feet and spans a length of 650 feet, with a storage capacity of 899 acre-feet and a surface area of 52 acres. Situated on the TRIB RUBICON CREEK, the dam is regulated, permitted, inspected, and enforced by the Illinois Department of Natural Resources, ensuring its safe operation and maintenance.
With a significant hazard potential and a moderate risk assessment rating, Greenfield City Dam plays a crucial role in water resource management and climate resilience efforts in the region. Despite lacking detailed condition assessment information, the dam's uncontrolled spillway and outlet gates provide essential flood control measures. The dam's emergency action plan status and risk management measures are currently not available, highlighting the need for further monitoring and preparedness to mitigate potential risks and ensure the safety of surrounding communities.
As a key component of the local water supply system, Greenfield City Dam serves as a critical infrastructure for meeting the water needs of residents in GREENFIELD and beyond. Its location and design make it a vital asset for storing and regulating water flow, with a maximum discharge capacity of 984 cubic feet per second. While the dam's risk assessment indicates a moderate level of risk, ongoing inspections and maintenance efforts are essential to ensure the dam's continued functionality and resilience in the face of changing climate conditions.
Year Completed |
1959 |
Dam Length |
650 |
Dam Height |
33 |
River Or Stream |
TRIB RUBICON CREEK |
Primary Dam Type |
Earth |
Surface Area |
52 |
Drainage Area |
1.1 |
Nid Storage |
899 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
33 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Macoupin Creek Near Kane
|
20cfs |
Mill Creek Near Florissant
|
0cfs |
Illinois River At Valley City
|
4670cfs |
Indian Creek At Wanda
|
1cfs |
Coldwater Creek Near Black Jack
|
7cfs |
Bay Creek At Pittsfield
|
43cfs |
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.
Greenfield City Dam