Englewood Reservoir Report

Last Updated: December 5, 2025

Englewood, also known as Little Dry Creek, is a flood risk reduction structure located in Arapahoe County, Colorado.


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Summary

Owned and regulated by the local government, this earth dam was completed in 1936 and stands at a height of 55 feet, with a hydraulic height of 55 feet and a structural height of 64 feet. The dam spans a length of 2300 feet and has a storage capacity of 3500 acre-feet, serving the primary purpose of mitigating flood risks along Willow Creek.

With a high hazard potential and a satisfactory condition assessment as of November 2018, Englewood is equipped with an uncontrolled spillway and outlet gates. The dam has undergone modifications in 1975 for structural enhancements, and regular inspections are conducted every three years to ensure its integrity. Despite its moderate risk assessment level, the structure has not experienced any major incidents and is deemed to meet guidelines for emergency action preparedness, although the last revision of the emergency action plan was in August 2020.

As a vital component of flood management in the region, Englewood plays a crucial role in protecting the surrounding community from potential inundation. With its strategic location and effective design, this dam serves as a key asset in enhancing water resource management and climate resilience efforts in the area.

Years Modified

1975 - Structural

Year Completed

1936

Dam Length

2300

Dam Height

55

River Or Stream

WILLOW CREEK

Primary Dam Type

Earth

Surface Area

125

Hydraulic Height

55

Drainage Area

9

Nid Storage

3500

Structural Height

64

Outlet Gates

Uncontrolled

Hazard Potential

High

Foundations

Soil

Nid Height

64
       
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.