Nancy Inderwiesen Dam Reservoir Report
Nearby: Lake Viking Dam Hallman Lake Dam
Last Updated: December 18, 2025
Nancy Inderwiesen Dam, located in Daviess, Missouri, is a privately owned structure designed by the USDA NRCS in 1989 for grade stabilization purposes along the TR-Big Creek.
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Summary
The earth dam stands at a height of 25 feet with a hydraulic and structural height of 27 feet, spanning a length of 519 feet. With a storage capacity of 34 acre-feet, the dam serves multiple purposes including fire protection, stock watering, small fish pond, and grade stabilization, covering a drainage area of 30 acres.
Managed by the Natural Resources Conservation Service, the dam features an uncontrolled spillway with a width of 11 feet and a maximum discharge capacity of 12.1 cubic feet per second. Despite a low hazard potential and moderate risk assessment score, the dam is not currently rated for its condition. With no outlet gates and a surface area of 3 acres, the dam has not undergone any modifications since its completion, and inspections are scheduled every 5 years to ensure its structural integrity and safety for the surrounding community.
Situated in a picturesque landscape, the Nancy Inderwiesen Dam plays a vital role in water resource management and conservation efforts in the region. Its construction marked a significant contribution to environmental sustainability, providing essential benefits to the local ecosystem while safeguarding against potential hazards. As water resource and climate enthusiasts, the Nancy Inderwiesen Dam stands as a testament to the importance of responsible infrastructure development and the preservation of our natural resources for future generations.
Year Completed |
1989 |
Dam Length |
519 |
Dam Height |
25 |
River Or Stream |
TR-BIG CREEK |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
25 |
Drainage Area |
30 |
Nid Storage |
34 |
Structural Height |
27 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
Seasonal Comparison
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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.
Nancy Inderwiesen Dam