Denby Dam 1 Reservoir Report
Last Updated: December 20, 2025
Denby Dam 1, located in Sangamon County, Illinois, was completed in 1976 and is owned by a private entity.
°F
°F
mph
Wind
%
Humidity
Summary
The dam, with a height of 25 feet and a length of 300 feet, serves the primary purpose of creating a Fish and Wildlife Pond, while also offering recreational opportunities. The structure, designed by USDA NRCS, is classified as an Earth dam with a stone core and soil foundation, and has a low hazard potential.
The dam, situated on Lick Creek, has a storage capacity of 20 acre-feet and a surface area of 2 acres, serving a drainage area of 0.06 square miles. It is regulated by the Illinois Department of Natural Resources and undergoes regular inspections to ensure its safety and compliance with state regulations. The spillway, of uncontrolled type, has a width of 15 feet, and the dam has uncontrolled outlet gates.
Despite having a moderate risk assessment score of 3, Denby Dam 1 is considered a relatively safe structure with no specific condition assessment available. The dam's emergency action plan status, inundation maps, and risk management measures are currently not available, but the structure's overall risk level is deemed manageable. With its focus on wildlife conservation and recreational use, Denby Dam 1 stands as an important resource in the local ecosystem and watershed management efforts.
Year Completed |
1976 |
Dam Length |
300 |
Dam Height |
25 |
River Or Stream |
LICK CREEK |
Primary Dam Type |
Earth |
Surface Area |
2 |
Drainage Area |
0.06 |
Nid Storage |
20 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Spring Creek At Springfield
|
7cfs |
South Fork Sangamon River Nr Rochester
|
11cfs |
Sangamon River At Riverton
|
125cfs |
Sangamon River At Petersburg
|
209cfs |
Lake Fork Near Cornland
|
17cfs |
Salt Creek Near Greenview
|
204cfs |
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.
Denby Dam 1