Harris #1, also known as Big Dam, is a privately-owned irrigation structure located in Mosby, Montana.
Wind
Humidity
Built in 1975 by the USDA NRCS, this earth-type dam stands at a height of 14 feet and has a length of 1900 feet. With a storage capacity of 136 acre-feet, the dam primarily serves the purpose of irrigation for the surrounding area.
Situated on TR-Duck Creek in Petroleum County, Harris #1 is regulated by the Montana Department of Natural Resources and Conservation (DNRC) and undergoes regular inspections and enforcement measures. Despite its low hazard potential, the condition of the dam has not been rated, and there is no Emergency Action Plan (EAP) in place. The dam's location, design, and historical completion date make it an important asset for water resource management in the region.
With a maximum discharge of 250 cubic feet per second and a spillway width of 50 feet, Harris #1 plays a crucial role in managing water resources and supporting agricultural activities in the area. As water resource and climate enthusiasts, understanding the design, purpose, and regulatory aspects of structures like Harris #1 is essential for promoting sustainable water management practices and ensuring the safety and reliability of irrigation systems in Montana.
Year Completed |
1975 |
Dam Length |
1900 |
Dam Height |
14 |
River Or Stream |
TR-DUCK CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
14 |
Drainage Area |
0.94 |
Nid Storage |
136 |
Hazard Potential |
Low |
Nid Height |
14 |