Iowa Noname66 Reservoir Report
Last Updated: December 13, 2025
Iowa Noname66 is a privately-owned dam located in Buena Vista, Iowa, specifically in the city of Linn Grove.
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Summary
Built in 1975 by the USDA NRCS, this Earth-type dam stands at 27 feet high and spans 200 feet in length. Its primary purpose is for fire protection, stock, or as a small fish pond, with a storage capacity of 42 acre-feet and a surface area of 2.5 acres. The dam is regulated by the Iowa Department of Natural Resources and undergoes state permitting, inspection, and enforcement.
Situated on TR-Cottonwood Creek, Iowa Noname66 is classified as having a low hazard potential and a moderate risk level. Despite not being rated for its condition assessment, the dam continues to serve its intended purposes effectively. While lacking certain safety features such as outlet gates and spillway width, the dam remains crucial for local water resource management. With its location in a rural area, the dam's impact on the surrounding environment and community is closely monitored by state regulatory agencies to ensure its ongoing safety and functionality.
Although Iowa Noname66 has not been updated recently and lacks certain emergency preparedness measures, its importance for fire protection and water storage cannot be understated. As a key structure in the area, it plays a vital role in maintaining water resources and supporting agricultural activities. Climate and water resource enthusiasts can appreciate the dam's significance in the local ecosystem and the efforts made by regulatory agencies to ensure its continued operation for the benefit of the community.
Year Completed |
1975 |
Dam Length |
200 |
Dam Height |
27 |
River Or Stream |
TR-COTTONWOOD CREEK |
Primary Dam Type |
Earth |
Surface Area |
2.5 |
Drainage Area |
0.19 |
Nid Storage |
42 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Sioux River At Linn Grove
|
257cfs |
Ocheyedan River Near Spencer
|
59cfs |
Floyd River At Alton
|
36cfs |
Little Sioux River At Correctionville
|
327cfs |
North Raccoon River Near Sac City
|
312cfs |
Floyd River At James
|
187cfs |
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 Noname66