Sears Reservoir Report
Last Updated: December 13, 2025
Sears Dam, located on Rock Creek in Rock Island, Illinois, is a state-regulated hydroelectric structure with a low hazard potential.
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Summary
Built in 1912, this gravity dam stands at a height of 16 feet and spans 460 feet in length, with a storage capacity of 670 acre-feet. The primary purpose of Sears Dam is hydroelectric power generation, while also serving recreational activities in the area.
Managed by the Federal Energy Regulatory Commission, Sears Dam undergoes inspections every three years to ensure its structural integrity. The dam features an uncontrolled spillway and is designed with multi-arch concrete gravity construction. Despite being classified as having a moderate risk level, the dam's condition assessment is currently marked as 'Not Available', suggesting a need for further evaluation and risk management measures.
Water resource and climate enthusiasts interested in Sears Dam will find it to be a historic and functional structure that contributes to both energy production and local recreation. With its location in the picturesque Rock Island County, Illinois, Sears Dam presents an opportunity for environmental monitoring and sustainable water resource management practices to ensure its continued safe operation for the surrounding community.
Year Completed |
1912 |
Dam Length |
460 |
Dam Height |
13 |
River Or Stream |
Rock Creek |
Primary Dam Type |
Gravity |
Surface Area |
570 |
Hydraulic Height |
16 |
Drainage Area |
11000 |
Nid Storage |
670 |
Structural Height |
16 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
16 |
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.
Sears
Big Island Parkway Rock Island