Eaton - Law Reservoir Report

Last Updated: December 5, 2025

Located in Weld County, Colorado, the Eaton - Law dam, also known as Gress, has been serving its primary purpose of irrigation since it was completed in 1892.


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Summary

This private-owned earth dam stands at a height of 9 feet and spans 800 feet in length, with a storage capacity of 768 acre-feet. Situated on The Slough river, it plays a crucial role in water resource management in the region, with a normal storage capacity of 528 acre-feet.

Despite its historical significance, the Eaton - Law dam has been flagged with a significant hazard potential and an unsatisfactory condition assessment. With a moderate risk assessment rating, there are concerns about its safety and the potential impact of any failure. Regular inspections are conducted by the Colorado Department of Water Resources, with the last inspection taking place in October 2020. As a vital piece of infrastructure for irrigation in the area, the dam's maintenance and risk management measures are crucial for ensuring the safety of the surrounding communities and the sustainability of water resources in the region.

Year Completed

1892

Dam Length

800

Dam Height

9

River Or Stream

THE SLOUGH

Primary Dam Type

Earth

Surface Area

64

Hydraulic Height

9

Nid Storage

768

Structural Height

9

Hazard Potential

Significant

Nid Height

9
       
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.