Located in Woodbury County, Iowa, the Dutch Hollow Subwatershed Site M-3 is a vital water resource managed by the local government.
Wind
Humidity
Built in 1984 by USDA NRCS, this earth dam sits on Koker Creek and serves multiple purposes including fire protection, stock, small fish pond, and flood risk reduction. With a dam height of 42 feet and a storage capacity of 444 acre-feet, the site covers a drainage area of 2.14 square miles and has a surface area of 15.4 acres.
Although the dam is categorized as low hazard potential, it is regulated by the Iowa DNR and undergoes regular state inspections and enforcement. The site is designed to release water through an uncontrolled spillway and has not been modified since its completion. Despite its moderate risk assessment rating, the condition of the dam is currently not rated, and there is no emergency action plan in place. Overall, Dutch Hollow Subwatershed Site M-3 plays a crucial role in managing water resources in the region and ensuring the safety of surrounding communities.
Year Completed |
1984 |
Dam Length |
650 |
Dam Height |
42 |
River Or Stream |
KOKER CREEK |
Primary Dam Type |
Earth |
Surface Area |
15.4 |
Drainage Area |
2.14 |
Nid Storage |
444 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
42 |
Maple River At Mapleton
|
323cfs |
Little Sioux River At Correctionville
|
327cfs |
West Fork Ditch At Hornick
|
80cfs |
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Soldier River At Pisgah
|
112cfs |