Moss Dam Reservoir Report

Last Updated: December 6, 2025

Moss Dam, located in Jackson, Indiana, is a Federal-owned structure designed by MILLER, WIHRY & LEE INC.


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Summary

The dam, built in 1980, serves as a Fish and Wildlife Pond on Mutton Creek. Standing at a height of 15 feet with a hydraulic height of 15 feet and a structural height of 19 feet, Moss Dam has a length of 5230 feet and a storage capacity of 7244 acre-feet. The dam's purpose is to provide water resource management for the Fish and Wildlife Service, with a primary focus on maintaining a healthy habitat for aquatic life.

Despite its low hazard potential and fair condition assessment, Moss Dam undergoes regular inspections every five years to ensure its structural integrity. The dam features outlet gates for controlled water release, with modifications made in 1996 and 2008 for improved functionality. The Federal agency responsible for the dam's ownership, design, construction, regulation, inspection, and operation is the Fish and Wildlife Service. Moss Dam plays a crucial role in managing water resources for the surrounding area, showcasing the intersection of water resource management and wildlife conservation efforts.

Years Modified

1996 - Other, 2008 - Mechanical

Year Completed

1980

Dam Length

5230

Dam Height

15

River Or Stream

MUTTON CREEK

Primary Dam Type

Earth

Surface Area

576

Hydraulic Height

15

Drainage Area

58.1

Nid Storage

7244

Structural Height

19

Outlet Gates

Other Controlled, Slide (sluice gate)

Hazard Potential

Low

Foundations

Soil

Nid Height

19
       
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.