Rosemont Reservoir Report

Last Updated: December 5, 2025

Rosemont is a significant rockfill dam located on East Beaver Creek in Teller County, Colorado.


°F

°F

mph

Wind

%

Humidity

Summary

Completed in 1961, this dam serves primarily for water supply purposes, with a normal storage capacity of 2538 acre-feet and a total storage capacity of 3155 acre-feet. The dam stands at a height of 90 feet, with a hydraulic height of 115 feet and a structural height of 120 feet, encompassing a surface area of 95 acres.

With a spillway width of 70 feet and a maximum discharge capacity of 3500 cubic feet per second, Rosemont is regulated by the Colorado Department of Water Resources. The dam's condition has been assessed as satisfactory during the last inspection in May 2019, with a moderate risk rating. The dam's hazard potential is considered significant, highlighting the importance of ongoing maintenance and risk management measures to ensure its continued safety and functionality for water resource and climate enthusiasts in the region.

Year Completed

1961

Dam Length

680

Dam Height

90

River Or Stream

EAST BEAVER CREEK

Primary Dam Type

Rockfill

Surface Area

95

Hydraulic Height

115

Drainage Area

3

Nid Storage

3155

Structural Height

120

Hazard Potential

Significant

Foundations

Rock

Nid Height

120
       
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.