Seepage Lake Reservoir Report

Last Updated: December 5, 2025

Seepage Lake, also known as Mortenson Lake or Garber Lake, is a federal-owned water resource nestled in Albany, Wyoming.


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Summary

This earth dam, designed by Gardner Manfull and completed in 1970, serves primarily for irrigation purposes, with a storage capacity of 603 acre-feet. The dam stands at a height of 7 feet with a hydraulic height of 2 feet, creating a surface area of 71 acres.

Despite its low hazard potential, Seepage Lake has been rated as having a poor condition, last inspected in July 2017. The dam's spillway type is uncontrolled, with a width of 40 feet and an outlet gate consisting of a single valve. The lake is situated near the Meeboer or Soda Lake Draw river/stream and falls under the jurisdiction of the State of Wyoming, regulated by the State Engineer's Office. With its moderate risk assessment and the need for maintenance, Seepage Lake presents an intriguing case study for water resource and climate enthusiasts interested in the management and upkeep of crucial irrigation infrastructure.

Year Completed

1970

Dam Length

1600

Dam Height

7

River Or Stream

MEEBOER OR SODA LAKE DRAW

Primary Dam Type

Earth

Surface Area

71

Hydraulic Height

2

Nid Storage

603

Structural Height

7

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

7
       
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.