Clark Reservoir Report

Last Updated: December 5, 2025

Located in Delta, Colorado, the Clark dam, also known as Delta City #1, is a vital structure managed by the local government for water supply purposes.


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Summary

Constructed in 1952 by the USDA NRCS, this earth-type dam stands at a height of 19 feet with a length of 730 feet, providing a maximum storage capacity of 64 acre-feet. The dam is situated on the Oak Creek-TR river and is regulated by the Colorado Department of Water Resources, ensuring proper permitting, inspection, and enforcement protocols are in place.

Despite its low hazard potential and fair condition assessment, the Clark dam poses a high risk due to its location and design. With a spillway width of 20 feet and uncontrolled outlet gates, the dam has a maximum discharge capacity of 600 cubic feet per second. The dam is regularly inspected every six years to monitor its condition and ensure compliance with safety standards. While the risk assessment indicates a high level of risk, the dam remains a crucial asset for irrigation and water supply in the region.

Overall, the Clark dam serves as an essential component of the water resource infrastructure in Delta, Colorado. With its strategic location and design, the dam plays a significant role in water supply management for the local community. While efforts are made to mitigate potential risks and ensure the dam's safety, ongoing monitoring and maintenance are essential to safeguard its integrity and reliability for the future.

Year Completed

1952

Dam Length

730

Dam Height

19

River Or Stream

OAK CREEK-TR

Primary Dam Type

Earth

Surface Area

5

Hydraulic Height

19

Nid Storage

64

Structural Height

22

Outlet Gates

Slide (sluice gate), Uncontrolled

Hazard Potential

Low

Foundations

Soil

Nid Height

22
       
Seasonal Comparison

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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.