Theobold Subwatershed 6975 Reservoir Report
Last Updated: December 13, 2025
The Theobold Subwatershed 6975, located in Woodbury County, Iowa, is a crucial water resource managed by the local government with oversight from the Iowa Department of Natural Resources.
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Summary
This subwatershed serves multiple purposes including fire protection, stock, small fish pond maintenance, and flood risk reduction. The primary dam structure, completed in 1948, is an earth dam standing at 38 feet tall with a length of 400 feet, providing a storage capacity of 74 acre-feet.
Managed by the USDA NRCS, the Theobold Subwatershed 6975 is classified as having a low hazard potential with a moderate risk assessment. Despite its low hazard potential, the subwatershed has not been recently assessed for its condition. The subwatershed's location along the TR-East Fork Wolf Creek showcases its importance in managing water resources for both agriculture and conservation purposes. Climate enthusiasts and water resource experts will find the data on this subwatershed valuable for understanding the management of water resources in the region.
Year Completed |
1948 |
Dam Length |
400 |
Dam Height |
38 |
River Or Stream |
TR-EAST FORK WOLF CREEK |
Primary Dam Type |
Earth |
Surface Area |
2.5 |
Drainage Area |
0.48 |
Nid Storage |
74 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
38 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Sioux River At Correctionville
|
327cfs |
West Fork Ditch At Hornick
|
80cfs |
Maple River At Mapleton
|
323cfs |
Floyd River At James
|
187cfs |
Missouri River At Sioux City
|
15100cfs |
Omaha Cr At Homer
|
45cfs |
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.
Theobold Subwatershed 6975