The Dutch Hollow Subwatershed Site M-4 in Danbury, Iowa, is a local government-owned earth dam completed in 1984 by the USDA NRCS.
Wind
Humidity
With a height of 33 feet and a length of 500 feet, this dam serves multiple purposes including fire protection, stock, small fish pond, and flood risk reduction. It has a storage capacity of 195 acre-feet and covers a surface area of 7.1 acres, with a drainage area of 0.66 square miles, located along the TR-Koker Creek.
Despite being classified as a low hazard potential, the Dutch Hollow Subwatershed Site M-4 has a moderate risk assessment of 3 due to its age and condition assessment being listed as "Not Rated." While the dam is state regulated, permitted, and inspected by the Iowa DNR, it lacks specific information on emergency action plans and risk management measures. The dam's spillway is uncontrolled, and it does not have outlet gates or associated structures, highlighting the need for further assessment and potentially updating safety protocols to ensure the protection of downstream areas and the environment.
Year Completed |
1984 |
Dam Length |
500 |
Dam Height |
33 |
River Or Stream |
TR-KOKER CREEK |
Primary Dam Type |
Earth |
Surface Area |
7.1 |
Drainage Area |
0.66 |
Nid Storage |
195 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
33 |
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 |