Lakewood Reservoir Reservoir Report

Last Updated: December 4, 2025

Lakewood Reservoir, located in Boulder, Colorado, is a vital water supply structure managed by the local government.


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Summary

Built in 1906, this Earth-type dam stands at 22 feet high, with a structural length of 725 feet. The reservoir has a maximum storage capacity of 55 acre-feet and a normal storage level of 42 acre-feet, serving as a key source of water for the surrounding area.

Despite its age, Lakewood Reservoir is in satisfactory condition with a low hazard potential. The dam has undergone modifications in 1994 and 1996 to enhance its hydraulic and structural features. With a spillway width of 12 feet and a maximum discharge capacity of 194 cubic feet per second, the reservoir is equipped to handle potential overflow events. Additionally, the risk assessment for the reservoir is moderate, signaling a proactive approach to managing any potential threats.

Managed by the local government and regulated by the Colorado Department of Water Resources, Lakewood Reservoir plays a crucial role in water supply management for the region. With its strategic location along North Boulder Creek, this reservoir serves as a reliable source of water for the community, highlighting the importance of sustainable water resource management in the face of changing climate conditions.

Years Modified

1994 - Hydraulic, 1996 - Structural

Year Completed

1906

Dam Length

725

Dam Height

22

River Or Stream

NORTH BOULDER CREEK-OS

Primary Dam Type

Earth

Surface Area

4

Hydraulic Height

22

Nid Storage

55

Structural Height

22

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Rock, Soil

Nid Height

22
       
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.