Flatiron Reservoir Nr Loveland Reservoir Report

Last Updated: December 4, 2025

The Flatiron Reservoir is located in Loveland, Colorado, and was constructed in 1951 by the Bureau of Reclamation for irrigation purposes.


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Summary

The reservoir's water source comes from the Colorado River, which is transported via the Colorado-Big Thompson Project. The reservoir has a capacity of 46,000 acre-feet and is primarily used for irrigation, domestic, and industrial purposes. The hydrology of the reservoir is influenced by the surrounding mountain ranges, which contribute to its water supply through snowmelt and precipitation. The reservoir's primary surface flow providers are the Little Thompson River, and its tributaries, while the snowpack providers are the surrounding mountain ranges. The reservoir also serves as a recreational area, with activities such as fishing, boating, and camping available.

Reservoir Details

Storage 24hr Change -1.58%
Percent of Normal 109%
Minimum 136.0 acre-ft
2001-11-06
Maximum 938.0 acre-ft
1996-08-10
Average 559 acre-ft
Nid_Height 86
Hydraulic_Height 63
Primary_Dam_Type Earth
Drainage_Area 7.42
Year_Completed 1953
Dam_Height 86
Structural_Height 86
River_Or_Stream DRY CREEK-TR, CHIMNEY HOLLOW CREEK
Surface_Area 381500
Hazard_Potential High
Nid_Storage 1136
Dam_Length 1725
       
Seasonal Comparison
Storage Levels
Storage Levels
Pool Elevation Levels

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.