Streator Vermilion River Dam Reservoir Report
Nearby: Lentman Lake Dam Gower Pond Dam 1
Last Updated: December 26, 2025
The Streator Vermilion River Dam, located in Livingston County, Illinois, was completed in 1925 and serves as a crucial water supply structure along the Vermilion River.
°F
°F
mph
Wind
%
Humidity
Summary
This private dam stands at a height of 14 feet with a length of 220 feet, providing a storage capacity of 1330 acre-feet. The dam primarily functions as a gravity structure with a buttress core type, designed for water supply purposes.
Managed by the Illinois Department of Natural Resources (IDNR), the Streator Vermilion River Dam is subject to state regulation, inspection, and enforcement to ensure its safe operation. With a significant hazard potential and moderate risk assessment rating, the dam's emergency action plan status and risk management measures are currently not available. The dam's spillway, classified as uncontrolled, features a width of 200 feet, highlighting its importance in managing water flow and preventing potential flooding events in the area.
For water resource and climate enthusiasts, the Streator Vermilion River Dam presents a fascinating example of early 20th-century engineering for water supply infrastructure. As a vital component of the local water management system, this gravity dam underscores the importance of ongoing monitoring and maintenance to mitigate risks and ensure the safety and reliability of water resources in the region.
Year Completed |
1925 |
Dam Length |
220 |
Dam Height |
14 |
River Or Stream |
VERMILION RIVER |
Primary Dam Type |
Gravity |
Nid Storage |
1330 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
14 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Vermilion River Near Leonore
|
21cfs |
Vermilion River At Pontiac
|
12cfs |
Illinois River At Marseilles
|
5310cfs |
Fox River At Dayton
|
830cfs |
Mazon River Near Coal City
|
4cfs |
Illinois River At Henry
|
7240cfs |
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.
Streator Vermilion River Dam