Lemolo 1 P-1927

General information

Waterway  North Umpqua River
Current status   Active license 
Type of facility Conventional Hydro
Mode of hydropower generation Peaking
Type of permit FERC License

FERC information

FERC docket # P-1927
FERC project name North Umpqua
Other projects with this FERC number
Permit issued 11/13/03
Permit expiration 10/27/38

Ownership and operation

Owner PacifiCorp
Owner type Investor-Owned Utility
Year first online (conventional hydro) 1955
Transmission or distribution system owner PacifiCorp

Power and generating capacity

Number of units 1
Total capacity from hydraulic turbine-generator units within each plant 32.0 MW
Average annual net hydropower generation 132,862.5 MWH

The North Umpqua Project was constructed between 1947 and 1956. It consists of a series of dams and canals that divert water to the eight developments, each of which has a powerhouse and a dam. The Lemolo No. 1 Development, the furthest upstream development, includes a 120-foot-high diversion dam, a 419-acre reservoir (Lemolo Reservoir) with a total storage of 11,752 feet, 16,310 feet of canal and flumes extending from the Lemolo dam to the penstock intake, a 7,338-foot-long penstock, and a powerhouse on the North Umpqua River at the mouth of Warm Springs Creek, 4.5 miles downstream of the dam at Lemolo Reservoir. The powerhouse contains a single turbine-generator with a rated capacity of 29,000 kilowatts (kW). Storage in Lemolo Reservoir is used to control floods, increase power generation when demand is high in the late fall, and augment flows in the river downstream of the eight developments.

Is there something you’d like to add or correct? Please let us know.