Hadley Reservoir Report

Last Updated: December 5, 2025

Hadley is a private irrigation dam located in McCoy, Colorado, along the Egeria Creek.


°F

°F

mph

Wind

%

Humidity

Summary

Built in 1904, this Earth-type dam stands at a height of 12 feet and has a length of 250 feet, providing a storage capacity of 215 acre-feet. Despite its age, Hadley has a low hazard potential and is currently not rated in terms of its condition assessment.

The dam is under state regulation by the Colorado Division of Water Resources, with permitting, inspection, and enforcement all being conducted by the state agency. While the dam has not been modified in recent years, it is subject to regular inspections every six years to ensure its safety and functionality. Despite its high risk assessment of 2, Hadley lacks detailed risk management measures and emergency preparedness plans.

Enthusiasts of water resources and climate will find Hadley an interesting case study due to its historical significance in water management for irrigation purposes in Routt County. With its location in a high-risk area, there is a need to enhance risk management measures and emergency response protocols to safeguard the surrounding community and environment from any potential dam failure events.

Year Completed

1904

Dam Length

250

Dam Height

12

River Or Stream

EGERIA CREEK-TR

Primary Dam Type

Earth

Surface Area

12

Hydraulic Height

12

Nid Storage

215

Structural Height

12

Hazard Potential

Low

Nid Height

12
       
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.