North Umpqua River


Project Overview

North Umpqua

The 194-megawatt (mw) North Umpqua Hydroelectric Project (FERC No. 1927) is located in south central Oregon in a remote area of Douglas County, about 60 miles east of Roseburg. With the exception of some transmission facilities, the North Umpqua Hydroelectric Project is located entirely within the Umpqua National Forest. Several state and federal resource agencies, some with overlapping mandates, are involved in resource management in the project vicinity. View fact sheet (PDF).

Constructed between 1947 and 1956, the eight hydroelectric developments use water primarily from the North Umpqua River and from two of its major tributaries, the Clearwater River and Fish Creek, to generate electricity. The North Umpqua River originates on the western slope of the central Cascade mountain range in southwestern Oregon and drains approximately 470 square miles before it joins the South Umpqua River just west of Roseburg. 
 
The project contains eight of the 47 hydroelectric developments owned by PacifiCorp. The eight developments are: 
 
  • Lemolo No. 1 & 2 
  • Clearwater No. 1 & 2 
  • Toketee 
  • Fish Creek 
  • Slide Creek 
  • Soda Springs 
Each project development typically consists of a dam, waterway (canals and flumes), penstock and powerhouse. Seven of the eight power plants contain a single outdoor generating unit; the Toketee power plant contains three indoor turbine-generators. There are 21.7 miles of canal, 9.8 miles of flume and 5.8 miles of penstock and tunnels, for a total waterway length of 37.3 miles. 
 
Three reservoirs, Lemolo, Toketee, Soda Springs, and four forebays provide limited water storage. These impoundments range in size from about 15 to 450 surface acres. The dams or diversion structures associated with the project developments are predominantly low-earth or rockfill types, with the exception of the Slide Creek and Soda Springs concrete dam developments. The largest dam in the development is at Lemolo 1, rockfill, concrete facing dam about 120 feet high and 885 feet long. The North Umpqua project includes 117.5 miles of transmission line and 36 miles of access roads.

Project Contacts

Todd Olson
Director, Compliance
PacifiCorp Energy
825 NE Multnomah Street, Suite 1500
Portland, OR 97232
(503) 813-6657
todd.olson
@pacificorp.com

Beth Bendickson
Project Coordinator
PacifiCorp Energy
825 NE Multnomah Street, Suite 1500
Portland, OR 97232
(503) 553-4650
beth.bendickson
@pacificorp.com