Jawbone Dam #2, located in Harlowton, Montana, along Jawbone Creek, was completed in 1966 by the USDA NRCS to serve as a flood risk reduction structure.
Wind
Humidity
This earth-type dam stands at a height of 31 feet and has a length of 430 feet, with a storage capacity of 113 acre-feet. The dam is regulated by the DNRC and undergoes regular state inspections to ensure its structural integrity.
Despite being classified as having a high hazard potential, Jawbone Dam #2 has been assessed as being in satisfactory condition, with a moderate risk level. Its uncontrolled spillway and outlet gates serve as primary discharge mechanisms, with a maximum discharge capacity of 400 cubic feet per second. The dam's hazard potential and risk assessment highlight the importance of ongoing monitoring and maintenance to mitigate potential threats and ensure the safety of downstream communities and ecosystems.
As an integral part of the local government's flood risk reduction infrastructure, Jawbone Dam #2 plays a crucial role in protecting the surrounding area from potential flooding events. With its stone core and rock and soil foundations, the dam stands as a testament to the collaborative efforts of federal and state agencies in safeguarding water resources and addressing climate-related challenges in the region.
Year Completed |
1966 |
Dam Length |
430 |
Dam Height |
31 |
River Or Stream |
JAWBONE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
31 |
Drainage Area |
2.19 |
Nid Storage |
113 |
Structural Height |
36 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
High |
Foundations |
Rock, Soil |
Nid Height |
36 |