Nucla 3rd Ave Reservoir Reservoir Report

Last Updated: December 14, 2025

The Nucla 3rd Ave Reservoir, also known as the Old Town Reservoir, is a historic water body located in Nucla, Colorado.


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Summary

This local government-owned reservoir serves primarily for recreation purposes, offering opportunities for fishing, boating, and other water-based activities. Built in 1940, this stone dam structure stands at a height of 13 feet and has a storage capacity of 16 acre-feet, with a normal storage level of 11 acre-feet.

Managed and regulated by the Colorado Department of Water Resources, the Nucla 3rd Ave Reservoir is considered to have significant hazard potential but is currently assessed to be in fair condition. The reservoir features an uncontrolled spillway and outlet gates for water release. Despite its smaller surface area of 3 acres, the reservoir plays a crucial role in debris control and contributes to the recreational appeal of the surrounding area. With a moderate risk assessment rating, the reservoir is subject to regular inspections and maintenance to ensure its safety and functionality for the community.

Situated along the San Miguel River, this charming reservoir offers a peaceful retreat for water resource and climate enthusiasts to appreciate the beauty of the Montrose County landscape. With its rich history and scenic surroundings, the Nucla 3rd Ave Reservoir remains a treasured local gem that continues to provide both recreational enjoyment and essential water management benefits for the region.

Year Completed

1940

Dam Length

852

Dam Height

13

River Or Stream

SAN MIGUEL R, TR SP-OS

Primary Dam Type

Other

Surface Area

3

Hydraulic Height

13

Nid Storage

16

Structural Height

13

Outlet Gates

Slide (sluice gate), Uncontrolled

Hazard Potential

Significant

Foundations

Rock

Nid Height

13
       
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.