Bergen East Reservoir Report

Last Updated: December 5, 2025

Bergen East, also known as Bergen #2, is a privately owned irrigation structure located in Morrison, Colorado.


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Summary

This Earth-type dam was completed in 1874 and stands at a height of 40 feet, with a length of 1300 feet. It serves the primary purpose of irrigation and recreation, with a storage capacity of 1150 acre-feet and a surface area of 41 acres. The dam is situated on Weaver Gulch and is regulated by the Colorado Department of Water Resources, with inspections and enforcement carried out regularly to ensure its structural integrity.

With a high hazard potential and a satisfactory condition assessment, Bergen East has undergone multiple structural modifications over the years to enhance its safety and functionality. The dam has a spillway width of 20 feet and a maximum discharge capacity of 2600 cubic feet per second. While it poses a moderate risk, measures have been put in place to manage any potential emergencies, although the Emergency Action Plan (EAP) may need updating. The dam's location in Jefferson County, Colorado, makes it a valuable resource for water management in the region, highlighting the importance of maintaining its safety and efficiency for the surrounding communities.

Years Modified

1925 - Structural, 1943 - Structural, 1950 - Structural, 2000 - Structural

Year Completed

1874

Dam Length

1300

Dam Height

40

River Or Stream

WEAVER GULCH

Primary Dam Type

Earth

Surface Area

41

Hydraulic Height

40

Nid Storage

1150

Structural Height

40

Hazard Potential

High

Foundations

Soil

Nid Height

40
       
Seasonal Comparison

Weather Forecast

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.