The Arnold-Armstrong Subwtrshd Sta 76+60 #3 is a critical water resource infrastructure located in Monona, Iowa, designed by the USDA NRCS and regulated by the Iowa DNR.
Wind
Humidity
Completed in 1963, this earth dam serves multiple purposes including fire protection, stock, or small fish pond management, as well as flood risk reduction. With a dam height of 29 feet and a storage capacity of 75 acre-feet, it plays a crucial role in managing the water resources of the TR-Dutch Creek.
Despite being rated as low hazard potential, the dam has a moderate risk assessment score of 3, indicating the need for continued monitoring and maintenance. The condition of the dam is currently not rated, highlighting the importance of regular inspections and assessments to ensure its structural integrity. While the dam has not been modified in recent years and lacks certain emergency preparedness measures, its presence is essential for the community of Castana and surrounding areas for water management and protection against potential flooding events.
Year Completed |
1963 |
Dam Length |
202 |
Dam Height |
29 |
River Or Stream |
TR-DUTCH CREEK |
Primary Dam Type |
Earth |
Surface Area |
4.5 |
Drainage Area |
1.9 |
Nid Storage |
75 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
29 |
Maple River At Mapleton
|
323cfs |
West Fork Ditch At Hornick
|
80cfs |
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Missouri River At Decatur
|
15500cfs |
Soldier River At Pisgah
|
112cfs |