NC

Mission P-2619

General information

Waterway  Hiwassee River
Current status   Active 
Type of facility Conventional Hydro
Mode of hydropower generation Run-of-river/Upstream Peaking
Type of permit FERC License

FERC information

FERC docket # P-2619
FERC project name Mission
Permit issued 10/20/11
Permit expiration 9/26/41

Ownership and operation

Owner Duke Energy Carolinas, LLC
Owner type Investor-Owned Utility
Year first online (conventional hydro) 1924
Transmission or distribution system owner Duke Energy Carolinas, LLC

Power and generating capacity

Number of units 3
Total capacity from hydraulic turbine-generator units within each plant 1.8 mW
Average annual net hydropower generation 7,692.8 mWH

The Mission Project is located in western North Carolina at River Mile 106 on the Hiwassee River within the Hiwassee River Basin, just upstream of the Cherokee County line. The Tennessee Valley Authority’s Chatugue dam and the Town of Hayesville are located 15 miles and 9 miles, respectively, upstream of the Mission dam.The Mission Project consists of: (1) a 397-foot-long, 50-foot-high concrete dam that includes, beginning at the left abutment (a) a 66-foot-long non-overflow concrete gravity section, (b) a 126-foot-long gated spillway section with seven bays and Tainter gates, (c) a 72-foot-long non-overflow concrete gravity section, (d) a 54-foot-long intake section with three intake bays, and (e) a 79-foot-long non-overflow concrete gravity section; (2) a 47-acre reservoir (Mission Reservoir) at normal full pond elevation 1,658.17 feet mean sea level (msl); (3) three 56-foot-long concrete penstocks; (4) a powerhouse containing three turbine/generating units, the 500-kilowatt (kW) generating unit No. 1, the 500-kW generating unit No. 2, and the 800-kW generating unit No. 3, with a total installed capacity of 1.8 MW; and (5) appurtenant facilities. Because project power is transmitted directly to a single three-phase transformer switchyard which abuts the powerhouse, there is no primary transmission line at the project. There are currently no project recreation facilities.

Source: FERC