Cambridge Lakes Dam Reservoir Report

Last Updated: December 28, 2025

Cambridge Lakes Dam, located in Pingree Grove, Illinois, was completed in 2007 and serves as a crucial element for flood risk reduction along the Tributary 2 Tyler Creek.


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Summary

Managed by a private owner, the dam stands at 7 feet high and stretches 540 feet in length, providing a storage capacity of 412 acre-feet. The dam's primary purpose is flood risk reduction, and it is classified as an earth dam with a buttress core type.

Despite having a low hazard potential, the dam is under the jurisdiction of the Illinois Department of Natural Resources (IDNR), which oversees its regulation, permitting, inspection, and enforcement. The spillway type is uncontrolled with a width of 11 feet, and the outlet gates are also uncontrolled. The dam has a moderate risk assessment rating of 3, indicating a need for ongoing risk management measures. Overall, Cambridge Lakes Dam plays a crucial role in protecting the surrounding area from potential flooding and is a key component of water resource management in Kane County, Illinois.

Year Completed

2007

Dam Length

540

Dam Height

7

River Or Stream

TRIB 2 TYLER CREEK

Primary Dam Type

Earth

Surface Area

35

Drainage Area

3.1

Nid Storage

412

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

7
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.