Tordoff Dam Reservoir Report
Last Updated: December 15, 2025
Tordoff Dam, located in Woodbury County, Iowa, was completed in 1995 by the USDA NRCS and serves multiple purposes including fire protection and providing a stock or small fish pond.
°F
°F
mph
Wind
%
Humidity
Summary
This private dam is regulated by the Iowa Department of Natural Resources and is designed to hold a maximum storage capacity of 82 acre-feet, with a normal storage of 16 acre-feet. The dam stands at 28 feet high and spans 500 feet in length, with a surface area of 4.1 acres and a drainage area of 0.46 square miles.
With a low hazard potential and a moderate risk assessment rating, Tordoff Dam plays a crucial role in managing water resources in the area. The dam utilizes an uncontrolled spillway type and is predominantly made of earth materials with a soil foundation. Although the condition assessment is currently not rated, the dam undergoes state inspections and enforcement to ensure its safety and functionality. The dam's location near the TR- McElhaney Creek allows for efficient water storage and regulation, contributing to the overall water management efforts in the region.
Year Completed |
1995 |
Dam Length |
500 |
Dam Height |
28 |
River Or Stream |
TR- MC ELHANEY CREEK |
Primary Dam Type |
Earth |
Surface Area |
4.1 |
Drainage Area |
0.46 |
Nid Storage |
82 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Sioux River At Correctionville
|
327cfs |
Floyd River At James
|
187cfs |
West Fork Ditch At Hornick
|
80cfs |
Missouri River At Sioux City
|
14400cfs |
Perry Creek Near Milnerville
|
25cfs |
Maple River At Mapleton
|
323cfs |
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.
Tordoff Dam