Mill Creek 13a Reservoir Report
Nearby: Mill Creek 13b Mill Creek 1b
Last Updated: December 5, 2025
Mill Creek 13a, also known as Luttig, is a vital flood risk reduction structure located in Richland, Wisconsin.
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Summary
Managed by the local government and designed by the USDA NRCS, this earth dam stands at a height of 24 feet and spans 640 feet in length. Completed in 1962, it serves multiple purposes including debris control, flood risk reduction, and recreation, with a storage capacity of 175 acre-feet and a drainage area of 1 square mile.
Despite its age, Mill Creek 13a is assessed to be in fair condition with a low hazard potential. The dam's spillway is uncontrolled, allowing for a maximum discharge of 159 cubic feet per second. The structure is inspected every 10 years, with the last assessment conducted in April 2016. While it meets regulatory standards set by the Wisconsin Department of Natural Resources, there are no immediate plans for modification or improvement.
With its strategic location on the East Branch Mill Creek, Mill Creek 13a plays a crucial role in mitigating flood risks and ensuring the safety of nearby communities. As a key component of the local water management infrastructure, this dam continues to serve its purpose effectively while offering recreational opportunities for residents and visitors alike.
Year Completed |
1962 |
Dam Length |
640 |
Dam Height |
24 |
River Or Stream |
East Branch Mill Creek |
Primary Dam Type |
Earth |
Surface Area |
8 |
Hydraulic Height |
11 |
Drainage Area |
1 |
Nid Storage |
175 |
Structural Height |
24 |
Hazard Potential |
Low |
Nid Height |
24 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Wisconsin River At Muscoda
|
4800cfs |
Kickapoo River At La Farge
|
219cfs |
Kickapoo River At Steuben
|
392cfs |
Kickapoo River At State Highway 33 At Ontario
|
149cfs |
Lemonweir River At New Lisbon
|
261cfs |
Wisconsin River Near Wisconsin Dells
|
3240cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Mill Creek 13a