Coal And Crane Creek Structure 8 Reservoir Report
Last Updated: December 20, 2025
Coal and Crane Creek Structure 8, located in LaGrange, Illinois, is a privately-owned dam regulated by the Illinois Department of Natural Resources.
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Summary
Built in 1971 by the USDA NRCS, this earth dam stands at a height of 43 feet and has a length of 500 feet, providing a storage capacity of 32 acre-feet. The dam is designed with a buttress core type and an uncontrolled spillway with a width of 51 feet.
With a high hazard potential and a moderate risk assessment rating, Coal and Crane Creek Structure 8 is subject to regular inspections, with the last one conducted in September 2020. While the condition assessment is currently unavailable, the dam is operated as an uncontrolled structure with no outlet gates. Despite the risks associated with its design and location, the dam serves a crucial purpose in managing water resources in the area, highlighting the intersection of water resource management and climate resilience efforts in Illinois.
Year Completed |
1971 |
Dam Length |
500 |
Dam Height |
43 |
River Or Stream |
TRIB BLUFF DITCH |
Primary Dam Type |
Earth |
Nid Storage |
32 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
43 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
La Moine River At Ripley
|
33cfs |
Illinois River At Valley City
|
2970cfs |
Sangamon River Near Oakford
|
356cfs |
La Moine River At Colmar
|
17cfs |
Spoon River At Seville
|
161cfs |
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.
Coal And Crane Creek Structure 8