Arnold-Armstrong Subwtrshd 64+00 #25 is a local government-owned structure located in Monona, Iowa, specifically in the city of Castana.
Wind
Humidity
Completed in 1961 by the USDA NRCS, this earth dam serves multiple purposes including fire protection, stock, small fish pond management, and flood risk reduction. With a height of 27 feet and a length of 300 feet, the dam has a storage capacity of 32 acre-feet and covers a surface area of 1.8 acres, draining an area of 0.46 square miles.
Situated on the TR-Maple River, this dam has a low hazard potential and is currently not rated for its condition assessment. Despite lacking recent inspection dates, the dam is regulated, permitted, inspected, and enforced by the Iowa Department of Natural Resources. The risk assessment for this structure is moderate, indicating a level 3 risk. While the Emergency Action Plan status and inundation maps are not available, this dam plays a crucial role in managing water resources and mitigating flood risks in the region, highlighting its importance for water resource and climate enthusiasts.
Year Completed |
1961 |
Dam Length |
300 |
Dam Height |
27 |
River Or Stream |
TR-MAPLE RIVER |
Primary Dam Type |
Earth |
Surface Area |
1.8 |
Drainage Area |
0.46 |
Nid Storage |
32 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
Maple River At Mapleton
|
323cfs |
West Fork Ditch At Hornick
|
80cfs |
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Soldier River At Pisgah
|
112cfs |
Missouri River At Decatur
|
14900cfs |