Hartman Creek Number One Reservoir Report
Last Updated: December 6, 2025
Located in Waupaca, Wisconsin, Hartman Creek Number One is a state-regulated dam on the Hartman Creek river.
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Summary
Completed in 1939, this gravity dam stands at a height of 10.6 feet and has a storage capacity of 225 acre-feet, making it primarily used for recreation purposes. With a low hazard potential and a very high risk assessment rating, the dam has not been rated for its current condition, but regular inspections have been conducted to ensure its safety.
The dam's controlled spillway type and maximum discharge capacity of 1460 cubic feet per second highlight its importance in managing water flow and preventing flooding in the area. Despite its age, Hartman Creek Number One continues to serve as a vital water resource infrastructure, providing both recreational opportunities and essential water management functions. With the State of Wisconsin overseeing its permitting, inspection, and enforcement processes, the dam remains a key component in the region's water resource and climate resilience efforts.
For water resource and climate enthusiasts, Hartman Creek Number One represents a fascinating blend of historical engineering, environmental stewardship, and recreational value. As a gravity dam with a long-standing presence in the community, its role in water storage, flood control, and habitat preservation makes it an essential piece of the region's water infrastructure. With its risk assessment indicating a high level of importance in the area's water management strategies, Hartman Creek Number One stands as a testament to the ongoing efforts to balance human needs with environmental sustainability in the face of changing climate conditions.
Year Completed |
1939 |
Dam Length |
150 |
Dam Height |
10.6 |
River Or Stream |
HARTMAN CREEK |
Primary Dam Type |
Gravity |
Surface Area |
22 |
Hydraulic Height |
7 |
Drainage Area |
3 |
Nid Storage |
225 |
Structural Height |
10.6 |
Hazard Potential |
Low |
Nid Height |
11 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Waupaca River Near Waupaca
|
431cfs |
Tomorrow River Near Nelsonville
|
25cfs |
Little Wolf River At Royalton
|
-999999cfs |
Wolf River At New London
|
1050cfs |
Fox River At Berlin
|
723cfs |
Tenmile Creek Near Nekoosa
|
25cfs |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Hartman Creek State Park Campground
|
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Camp Onaway
|
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Lake Emily South Campground
|
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Lake Emily Park North Campground
|
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Napowan Adventure Base
|
Hartman Creek Number One
Knight Lake -- Channel Access