Ken Caryl Detention #2 Reservoir Report

Last Updated: December 5, 2025

Ken Caryl Detention #2, a privately owned flood risk reduction structure located in Littleton, Colorado, stands as a vital component in the protection of the surrounding community from potential water-related hazards.


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Summary

Completed in 1984, this Earth-type dam boasts a height of 23 feet and a length of 1070 feet, with a maximum storage capacity of 60 acre-feet. With a low hazard potential and satisfactory condition assessment, Ken Caryl Detention #2 plays a crucial role in managing the flow of the Massey Draw-OS stream and ensuring the safety of residents in Jefferson County.

Managed by the Colorado Department of Water Resources, this dam is subject to regular inspections, with the last assessment conducted in May 2015. Despite its moderate risk assessment, the structure is equipped with an uncontrolled spillway and outlet gates to manage potential overflow and maintain optimal water levels. With a maximum discharge capacity of 1400 cubic feet per second, Ken Caryl Detention #2 is well-prepared to handle varying water flow conditions and mitigate the risk of flooding in the region.

In the event of an emergency, the dam's emergency action plan (EAP) status is currently unreported, highlighting the importance of ongoing monitoring and preparedness efforts. As a key element in the flood risk reduction strategy for the area, Ken Caryl Detention #2 serves as a critical infrastructure asset that safeguards the community against the impacts of extreme weather events and changing climate patterns.

Year Completed

1984

Dam Length

1070

Dam Height

23

River Or Stream

MASSEY DRAW-OS

Primary Dam Type

Earth

Surface Area

8

Hydraulic Height

23

Drainage Area

3

Nid Storage

60

Structural Height

23

Outlet Gates

Needle - 0

Hazard Potential

Low

Nid Height

23
       
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.