Grove Creek #2 Reservoir Report

Last Updated: December 5, 2025

Grove Creek #2, also known as Emerson & Libby #2, is a private earth dam located in Mesa County, Colorado, specifically in the city of Collbran.


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Summary

Completed in 1911 for irrigation purposes, this historic structure stands at 16 feet tall and spans 755 feet in length. With a maximum storage capacity of 364 acre-feet and a normal storage of 76 acre-feet, this dam plays a crucial role in water resource management along Grove Creek.

Despite its age, Grove Creek #2 is in fair condition according to a 2015 assessment, with a low hazard potential. The dam underwent modifications in 1956 to enhance its hydraulic, mechanical, and structural features. It has a slide (sluice gate) outlet gate and no spillway, with a maximum discharge of 33,865 cubic feet per second. The risk assessment for this dam is rated as high (2), highlighting the importance of ongoing monitoring and maintenance to ensure its continued safety and effectiveness in water management for the surrounding area.

In the picturesque setting of Grove Creek, this private earth dam stands as a testament to early 20th-century water infrastructure development in Colorado. With its rich history and vital role in irrigation, Grove Creek #2 serves as a reminder of the enduring importance of sustainable water resource management practices in the face of changing climate conditions.

Years Modified

1956 - Hydraulic, 1956 - Mechanical, 1956 - Structural

Year Completed

1911

Dam Length

755

Dam Height

13

River Or Stream

GROVE CREEK

Primary Dam Type

Earth

Surface Area

39

Hydraulic Height

11

Nid Storage

364

Structural Height

16

Outlet Gates

Slide (sluice gate) - 1

Hazard Potential

Low

Foundations

Rock, Soil

Nid Height

16
       
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.