Iowa Noname35 Reservoir Report
Nearby: Sherman Dam Attril Dam
Last Updated: December 16, 2025
Iowa Noname35 is a significant earth dam located in Sioux City, Iowa, designed by the USDA NRCS and completed in 1967 for fire protection, stock, and small fish pond purposes.
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Summary
With a dam height of 35 feet and a length of 952 feet, it provides a storage capacity of 147 acre-feet and covers a surface area of 5.1 acres. The dam is regulated by the Iowa DNR and is inspected, permitted, and enforced by state authorities, ensuring its safety and compliance with regulations.
Situated on the TR-West Branch Perry Creek, Iowa Noname35 plays a crucial role in flood risk reduction in the area, with a moderate risk assessment rating. The dam has a significant hazard potential and is under state jurisdiction for permitting, inspection, and enforcement. Although the condition assessment is currently not rated, the dam's purpose and design reflect its importance in water resource management for the local community. With its strategic location and design features, Iowa Noname35 stands as a key infrastructure for water conservation and climate resilience in Plymouth County, Iowa.
Owned by the local government, Iowa Noname35 is an essential asset for water management in the region, serving multiple purposes and providing necessary storage capacity. As part of the Omaha District, the dam contributes to fire protection, stock maintenance, and small fish pond activities while also serving as a flood risk reduction measure. With its regulated status and compliance with state permitting and inspection requirements, Iowa Noname35 exemplifies the commitment to water resource stewardship and climate adaptation in the area.
Year Completed |
1967 |
Dam Length |
952 |
Dam Height |
35 |
River Or Stream |
TR-WEST BRANCH PERRY CREEK |
Primary Dam Type |
Earth |
Surface Area |
5.1 |
Drainage Area |
0.69 |
Nid Storage |
147 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Perry Creek Near Milnerville
|
25cfs |
Floyd River At James
|
187cfs |
Missouri River At Sioux City
|
14400cfs |
Big Sioux River At Akron
|
816cfs |
Omaha Cr At Homer
|
45cfs |
Vermillion River Nr Vermillion Sd
|
33cfs |
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.
Iowa Noname35