Summary
Constructed in 1978 by the USDA NRCS, this earth dam stands at 18 feet in height and spans 800 feet in length, with a storage capacity of 150 acre-feet. Despite its low hazard potential, the dam is regularly inspected by the WIDNR to ensure its fair condition and moderate risk assessment are maintained.
The Johnson dam, owned and regulated by the local government, showcases the collaborative effort between state and federal agencies in managing water resources for the community of Augusta. With a spillway width of 68 feet and a maximum discharge of 100 cfs, the dam serves as a crucial infrastructure for mitigating flood risks in the region. The dam's state-regulated status, along with its enforcement and inspection protocols, emphasize the commitment to ensuring public safety and environmental protection in the area.
For water resource and climate enthusiasts, Johnson dam stands as a testament to effective flood risk reduction infrastructure in Wisconsin. As part of the Natural Resources Conservation Service's portfolio, the dam's design and construction reflect a dedication to sustainable water management practices. With its moderate risk assessment and fair condition, the Johnson dam serves as a vital asset in safeguarding the Diamond Valley Creek watershed and surrounding communities from potential flooding events.
Year Completed |
1978 |
Dam Length |
800 |
Dam Height |
18 |
River Or Stream |
Diamond Valley Creek |
Primary Dam Type |
Earth |
Hydraulic Height |
18 |
Drainage Area |
2 |
Nid Storage |
150 |
Structural Height |
18 |
Hazard Potential |
Low |
Nid Height |
18 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Black River At Neillsville
|
193cfs |
Black River Ds St Hwy 54 @ Black River Falls
|
256cfs |
Chippewa River At Chippewa Falls
|
1490cfs |
Trempealeau River At Arcadia
|
400cfs |
Black River Near Galesville
|
862cfs |
Trempealeau River At Dodge
|
953cfs |
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.
Johnson
Coon Fork Lake -- Access