Big Wyacondah Watershed Site 7 Reservoir Report
Last Updated: December 6, 2025
Big Wyacondah Watershed Site 7, located in Davis County, Iowa, is a key water management infrastructure managed by the local government and designed by the USDA NRCS.
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Summary
This Earth dam, completed in 1976, serves multiple purposes including fire protection, stock watering, and small fish pond maintenance. With a dam height of 28 feet and a storage capacity of 194 acre-feet, this structure plays a crucial role in flood risk reduction for the TR-South Wyacondah river and its surrounding areas.
Despite being classified as a low hazard potential structure with a moderate risk assessment, the condition of Big Wyacondah Watershed Site 7 remains unrated. The dam's inspection frequency and emergency action plan status are currently unknown, highlighting areas for potential improvement in ensuring the safety and effectiveness of this important water resource infrastructure. Located within the Kansas City District, this site is under the jurisdiction of the Iowa DNR, with state permitting, inspection, and enforcement protocols in place to regulate its operations and maintenance.
Water resource and climate enthusiasts interested in the management and maintenance of vital water infrastructure will find Big Wyacondah Watershed Site 7 to be a fascinating case study. With its diverse range of functions and the potential for enhanced risk assessment and emergency preparedness measures, this site serves as a valuable example of the intersection between water resource management, environmental protection, and community safety in the state of Iowa.
Year Completed |
1976 |
Dam Length |
516 |
Dam Height |
28 |
River Or Stream |
TR-SOUTH WYACONDAH |
Primary Dam Type |
Earth |
Surface Area |
12 |
Drainage Area |
0.34 |
Nid Storage |
194 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Fox River At Bloomfield
|
7cfs |
Des Moines River At Keosauqua
|
1800cfs |
Chariton River At Livonia
|
45cfs |
Chariton River Near Moulton
|
34cfs |
Des Moines River At Ottumwa
|
1090cfs |
Chariton River At Novinger
|
86cfs |
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.
Big Wyacondah Watershed Site 7