Kenneth Johnson Structure Dam Reservoir Report
Last Updated: December 13, 2025
Located in Braddyville, Iowa, the Kenneth Johnson Structure Dam is a private earth dam completed in 1980 for the primary purpose of grade stabilization along the TR-Buchanan Creek-Nodaway River in Missouri.
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Summary
With a height of 25 feet and a hydraulic height of 24 feet, this dam spans 350 feet in length and has a maximum discharge capacity of 350 cubic feet per second. Despite being uncontrolled, the spillway width of 34 feet helps manage water flow during peak periods.
The dam's low hazard potential and moderate risk assessment make it a crucial structure for water resource management in the area, serving as a safeguard against potential flooding and erosion. While not currently rated for condition assessment, the Kenneth Johnson Structure Dam stands as a testament to effective engineering and design in maintaining the integrity of the surrounding landscape. Its association with the Kansas City District and the oversight of federal agencies ensure its continued operation and contribution to environmental conservation efforts.
Water resource and climate enthusiasts will appreciate the Kenneth Johnson Structure Dam as a vital component in the region's infrastructure, providing grade stabilization and flood control benefits. Situated in Nodaway County, Missouri, this earth dam serves as a key structure in managing water flow along the TR-Buchanan Creek-Nodaway River system. With a storage capacity of 26 acre-feet and a surface area of 3 acres, this dam plays a crucial role in protecting the local ecosystem and communities from potential water-related hazards.
Year Completed |
1980 |
Dam Length |
350 |
Dam Height |
25 |
River Or Stream |
TR-BUCHANAN CREEK-NODAWAY RVR |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
24 |
Drainage Area |
150 |
Nid Storage |
26 |
Structural Height |
26 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
26 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Kenneth Johnson Structure Dam