Arlington Subwatershed Sta 26+80 #12 Reservoir Report
Last Updated: December 14, 2025
The Arlington Subwatershed Sta 26+80 #12 is a local government-owned earth dam located in Moville, Iowa, along the TR-W Fork Little Sioux River.
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Summary
Completed in 1965 by the USDA NRCS, this dam serves multiple purposes including fire protection, stock, small fish pond, and flood risk reduction. With a height of 30 feet and a storage capacity of 40 acre-feet, it covers a surface area of 2.5 acres and drains a 0.2 square mile watershed.
Managed by the Iowa DNR, this dam has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. Despite its low risk level, it is subject to state regulation, permitting, inspection, and enforcement to ensure its safety and functionality. The dam has a moderate risk assessment score of 3, indicating some potential concerns that may need to be addressed in the future. Overall, the Arlington Subwatershed Sta 26+80 #12 plays a crucial role in water resource management and climate resilience efforts in the region.
As an important structure in the Omaha District, the Arlington Subwatershed Sta 26+80 #12 is a key component of the local water management system. Its strategic location and design make it a valuable asset for the community, providing essential services such as flood protection and water storage. With ongoing monitoring and maintenance, this dam will continue to support the needs of residents and the environment for years to come.
Year Completed |
1965 |
Dam Length |
337 |
Dam Height |
30 |
River Or Stream |
TR-W FORK LITTLE SIOUX RIVER |
Primary Dam Type |
Earth |
Surface Area |
2.5 |
Drainage Area |
0.2 |
Nid Storage |
40 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Sioux River At Correctionville
|
327cfs |
Floyd River At James
|
187cfs |
Perry Creek Near Milnerville
|
25cfs |
Missouri River At Sioux City
|
13700cfs |
West Fork Ditch At Hornick
|
80cfs |
Floyd River At Alton
|
36cfs |
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.
Arlington Subwatershed Sta 26+80 #12