Muddy Fork Structure No. 6 Reservoir Report

Last Updated: December 17, 2025

Muddy Fork Structure No.


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Summary

6, also known as Whitson Hollow Dam, is a key flood risk reduction infrastructure located in Clark County, Indiana. Built in 2004 by the USDA NRCS, this earth dam stands at a height of 52 feet and spans 1000 feet along the Persimmon Run. Its primary purpose is flood risk reduction, with a normal storage capacity of 81 acre-feet and a maximum discharge of 17,831 cubic feet per second.

Managed by local government authorities and regulated by the Indiana Department of Natural Resources, Muddy Fork Structure No. 6 plays a crucial role in protecting the surrounding community of Carwood from potential flood hazards. The dam's fair condition assessment and high hazard potential highlight the importance of regular inspections and maintenance to ensure its effective operation. With a moderate risk rating and a designated emergency action plan, this structure is well-prepared to handle any unforeseen events.

Despite its strategic location and critical function, Muddy Fork Structure No. 6 faces ongoing challenges related to its aging infrastructure and the need for continuous risk management measures. As a significant piece of water resource management in the region, stakeholders must prioritize its maintenance and upkeep to safeguard both the environment and the local population from potential flood threats.

Year Completed

2004

Dam Length

1000

Dam Height

52

River Or Stream

PERSIMMON RUN

Primary Dam Type

Earth

Surface Area

13

Hydraulic Height

51.7

Drainage Area

2.6

Nid Storage

1422

Structural Height

52

Outlet Gates

Valve

Hazard Potential

High

Foundations

Rock, Soil

Nid Height

52
       
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.