D.A. Lord #4 Reservoir Report

Last Updated: December 5, 2025

Located in Weld, Colorado, D.A.


°F

°F

mph

Wind

%

Humidity

Summary

Lord #4 is a private-owned reservoir with a primary purpose of irrigation. This Earth-type dam stands at a height of 16 feet, with a hydraulic height of 16 feet and a structural height of 20 feet. With a storage capacity of 2725 acre-feet and a surface area of 200 acres, this reservoir serves both irrigation and water supply needs in the region. The dam's spillway type is uncontrolled, with a width of 75 feet.

The reservoir's hazard potential is rated as low, with a fair condition assessment as of June 2019. Despite its moderate risk assessment rating, the dam is regulated and inspected by the Colorado State Department of Water Resources, ensuring its safety and compliance with state regulations. The reservoir is situated along the Lost Creek-TR river/stream, with a drainage area of 57 square miles. Its maximum discharge is recorded at 2580 cubic feet per second, making it a crucial water resource in the area for both agricultural and domestic purposes.

Dam Length

2658

Dam Height

16

River Or Stream

LOST CREEK-TR

Primary Dam Type

Earth

Surface Area

200

Hydraulic Height

16

Drainage Area

57

Nid Storage

2725

Structural Height

20

Hazard Potential

Low

Nid Height

20
       
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.