Spring Lake Wetland Unit 1 Reservoir Report
Last Updated: December 19, 2025
Spring Lake Wetland Unit 1, located in Liverpool, Illinois, is a privately owned fish and wildlife pond situated along the Tributary of Illinois River.
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Summary
Managed by the Natural Resource Conservation Service, this earth dam structure stands at 8 feet high and spans 500 feet in length, providing a storage capacity of 147.3 acre-feet. With a low hazard potential and a very high risk assessment rating, this wetland unit is equipped with a controlled spillway and vertical lift outlet gates for efficient water management.
This wetland structure in Tazewell County serves as a vital habitat for various aquatic species and supports a surface area of 71.3 acres within a drainage area of 0.11 square miles. The dam, constructed with stone core and soil foundation, was last inspected in 2013 and has a designated inspection frequency of 5 years. Despite its high risk assessment, the condition assessment of Spring Lake Wetland Unit 1 is currently marked as 'Not Available', highlighting the need for regular monitoring and maintenance to ensure its long-term integrity and functionality.
With the Illinois Department of Natural Resources overseeing state regulation, permitting, inspection, and enforcement for this wetland structure, Spring Lake Wetland Unit 1 plays a crucial role in enhancing local biodiversity and water resource management efforts. As a designated fish and wildlife pond, this structure not only provides valuable ecological benefits but also contributes to flood control and water quality improvement in the region, showcasing the intersection of conservation and climate resilience in the heart of Illinois.
Dam Length |
500 |
Dam Height |
8 |
River Or Stream |
TRIB ILLINOIS RIVER |
Primary Dam Type |
Earth |
Surface Area |
71.3 |
Drainage Area |
0.11 |
Nid Storage |
147.3 |
Outlet Gates |
Vertical Lift |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
8 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Illinois River At Kingston Mines
|
5290cfs |
Mackinaw River Near Green Valley
|
40cfs |
Sangamon River Near Oakford
|
356cfs |
Salt Creek Near Greenview
|
159cfs |
Spoon River At Seville
|
161cfs |
Fondulac Creek Near East Peoria
|
7cfs |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Back Country 11
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Back Country 10
|
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Back Country 12
|
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Back Country 9
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Back Country 8
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Back Country 7
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Spring Lake Wetland Unit 1