Blakely Mountain Dam, also known as Lake Ouachita, is a federal-owned structure located in Mountain Pine, Arkansas.
Wind
Humidity
Completed in 1953, this earth dam stands at 226 feet high and serves multiple purposes including flood risk reduction, hydroelectric power generation, recreation, and water supply for the surrounding area. The dam, managed by the US Army Corps of Engineers, holds a maximum storage capacity of 3,760,700 acre-feet and spans 1,100 feet in length.
However, despite its crucial functions, Blakely Mountain Dam poses a high hazard potential due to the risk of overtopping during major storm events. A risk assessment conducted in 2020 classified the project's risks as moderate, with concerns about potential dam failure and downstream flooding in the event of reservoir overflow. To mitigate these risks, the USACE has implemented a comprehensive risk management plan that includes regular surveillance, monitoring, and inspection of the dam, as well as the installation of interim risk-reduction measures such as berms and seepage collection systems.
In addition to these measures, the USACE engages in community outreach, collaborates with local emergency managers, and conducts regular emergency exercises to ensure preparedness in the event of a dam-related incident. By prioritizing safety and proactive risk management strategies, Blakely Mountain Dam continues to play a vital role in protecting downstream communities while providing essential water resources and recreational opportunities for the region.
Years Modified |
2009 - Other |
Year Completed |
1953 |
Dam Length |
1100 |
Dam Height |
226 |
River Or Stream |
OUACHITA RIVER |
Primary Dam Type |
Earth |
Surface Area |
40100 |
Hydraulic Height |
216 |
Drainage Area |
1105 |
Nid Storage |
3760700 |
Structural Height |
240 |
Outlet Gates |
Roller - 7, Vertical Lift - 4 |
Hazard Potential |
High |
Foundations |
Rock |
Nid Height |
240 |