Lake Carroll Sedimentation Pond 2 Dam Reservoir Report
Last Updated: December 14, 2025
Lake Carroll Sedimentation Pond 2 Dam in Boone Branch, Carroll County, Illinois, is a private dam designed by FEHR-GRAHAM & ASSOC.
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Summary
for debris control on the East Fork Plum River. Completed in 1988, this earth dam stands at a height of 14 feet and stretches 700 feet in length, providing a storage capacity of 134 acre-feet. With a low hazard potential and a moderate risk assessment rating, the dam is state-regulated by the Illinois Department of Natural Resources, ensuring regular inspections and enforcement.
The dam features an uncontrolled spillway with a width of 41 feet and can handle a maximum discharge of 3430 cubic feet per second. Although currently in good condition with no available assessment data, the dam's emergency action plan status and risk management measures are not specified. With a history of state permitting, inspection, and enforcement, Lake Carroll Sedimentation Pond 2 Dam plays a crucial role in debris control and water resource management in the region, under the ownership of a private entity.
Located within the Detroit District of the U.S. Army Corps of Engineers, this dam serves a primary purpose of debris control and is positioned in an area with a drainage area of 7.1 square miles. With its strategic placement and functional design, Lake Carroll Sedimentation Pond 2 Dam stands as a testament to effective water resource management and climate resilience, contributing to the overall environmental health and safety of the region.
Year Completed |
1988 |
Dam Length |
700 |
Dam Height |
14 |
River Or Stream |
EAST FORK PLUM RIVER |
Primary Dam Type |
Earth |
Drainage Area |
7.1 |
Nid Storage |
134 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
14 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Pecatonica River At Freeport
|
723cfs |
Elkhorn Creek Near Penrose
|
44cfs |
Pecatonica River At Martintown
|
473cfs |
Apple River Near Hanover
|
110cfs |
Rock River At Como
|
3350cfs |
Rock River At Byron
|
4300cfs |
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.
Lake Carroll Sedimentation Pond 2 Dam