Located in Shelby County, Iowa, the Mill Picayune Watershed Site M-22-3 is a significant earth dam completed in 1978 by the USDA NRCS.
Wind
Humidity
With a dam height of 37 feet and a length of 550 feet, this structure serves multiple purposes including fire protection, stock, small fish pond, and flood risk reduction. The dam has a storage capacity of 207 acre-feet, with a normal storage volume of 94 acre-feet and a surface area of 10 acres, covering a drainage area of 0.53 square miles.
Managed by the Iowa DNR, this watershed site is state-regulated and undergoes regular inspections to ensure its structural integrity and functionality. Despite being classified as having a significant hazard potential, the condition assessment in 2015 deemed the dam as satisfactory. With its proximity to TR-Mill Creek, the dam plays a crucial role in water resource management and environmental protection in the region. For water resource and climate enthusiasts, the Mill Picayune Watershed Site M-22-3 offers a fascinating case study in dam engineering and watershed management practices.
Year Completed |
1978 |
Dam Length |
550 |
Dam Height |
37 |
River Or Stream |
TR-MILL CREEK |
Primary Dam Type |
Earth |
Surface Area |
10 |
Drainage Area |
0.53 |
Nid Storage |
207 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
37 |
Boyer River At Logan
|
417cfs |
Soldier River At Pisgah
|
112cfs |
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Maple River At Mapleton
|
323cfs |
West Nishnabotna River At Hancock
|
154cfs |