Summary
Built in 1972, this gravity dam stands at 12 feet tall and spans 750 feet, creating a reservoir that holds 4,300 acre-feet of water from Muskego Creek. The dam's spillway type is uncontrolled, with a maximum discharge capacity of 325 cubic feet per second.
Despite being classified as having a high hazard potential, Little Muskego's condition is deemed satisfactory as of the last assessment in September 2020. The dam's risk assessment is moderate, with a rating of 3 out of 5. While the dam is regularly inspected every two years, emergency action plans and inundation maps have not been updated recently. With its scenic location and ample storage capacity for recreational activities, Little Muskego serves as a vital water resource for the community while also posing challenges in terms of risk management and emergency preparedness.
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Humidity
15-Day Weather Outlook
Year Completed |
1972 |
Dam Length |
750 |
Dam Height |
12 |
River Or Stream |
MUSKEGO CREEK |
Primary Dam Type |
Gravity |
Surface Area |
506 |
Hydraulic Height |
8 |
Drainage Area |
11.6 |
Nid Storage |
4300 |
Structural Height |
12 |
Hazard Potential |
High |
Nid Height |
12 |
Seasonal Comparison
5-Day Hourly Forecast Detail
Nearby Streamflow Levels
Root River At Grange Avenue At Greenfield
|
268cfs |
Root River Near Franklin
|
347cfs |
Fox River At Waukesha
|
350cfs |
Root River Canal Near Franklin
|
429cfs |
Mukwonago River At Mukwonago
|
68cfs |
Underwood Creek At Wauwatosa
|
75cfs |
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.
Little Muskego
Little Muskego Lake -- Oak Court Boat Ramp