Chelan County PUD

Incremental Hydropower

Rocky Reach Hydroelectric Project

Rocky Reach Hydroelectric Project

11 Generating Units
Dam contains 12 spillway gates.
Original construction started in 1956.
Commercial Operation 1961 (seven generators)
Four generators added in 1969 - 1971
Project license expired in 2006 (settlement agreement submitted; awaiting new license)

Rocky Reach Powerhouse Rehabilitation

No license amendment required
Site installation work began in 1995
New fish friendly turbine runner design and greaseless wicket gate bushings
Includes new electrical equipment, generators, machine condition monitoring and main step-up transformers
11 turbines and main transformers replaced between 1995 – 2003
Generators replaced between 2003 - 2007
Project completed in 2007
Total Project Cost $185 Million
Weighted model efficiency improvement = 3%

Rocky Reach Hydro Project C1 Turbine Rehabilitation As Shown, 372 Tons

Rocky Reach Generator Rehab

Rocky Reach Juvenile Fish Bypass System


Safely bypass juvenile fish around the Project

Bypass conduit length 4600 ft

Pipe size varies From 60 - 108 inches

Design flow 360 cfs or 161,000 gpm

Estimated travel time = six minutes

Total project cost $107 Million

Reduced spill due to Habitat Conservation Plan

Resulted in approximate 12% efficiency gain

Aerial View of Surface Collector & Pump Facility Houses 29 Pumps With an Attraction Flow of 6000 cfs

Rocky Reach Hydro Project Juvenile Fish Bypass System (JFBS) Aerial View at first Flow Test

Rock Island Hydro Project Aerial View of Rock Island Hydro

Rock Island Hydroelectric Project

First Powerhouse - 11 generators.
Second Powerhouse - 8 horizontal shaft (bulb) generators.
Dam contains 31 spillway gates.
Original construction of First Powerhouse completed in 1933.
Capacity expanded in 1951-1953 for Alcoa.
Second Powerhouse was constructed in 1979.
Project license expires in the year 2028.

Rock Island Rehabilitation

No license amendment required
Planned rehabilitation of six 22.5MW generating units ($156 million) by 2013
Completed rehabilitation of first unit in 2008 ($22 million)
Early testing shows efficiency gains of 7 – 10%
Unit is being tested before proceeding with other unit rehabs between 2009 - 2014
Planned generator stator replacement for four units in 2009 ($19.6 million) and two in 2014

Rock Island Hydro Project Future Rehabilitation of Powerhouse # 1

Lake Chelan Rehabilitation

Non-capacity license amendment due to 8.3% increase in hydraulic capacity
401 water quality certification needed for actions associated with license amendment
Planned rehabilitation of project’s two turbines
Replace project’s two generators
Other improvements to mechanical and electrical equipment
Increase in capacity from 48 MW to 59.2 MW
Lake Chelan Project is certified by the Low Impact Hydropower Institute

WA Renewable Portfolio Standard

Qualifying incremental hydropower generation
Hydro generated as a result of modifications to equipment and structures since 1999
Hydro generated as a result of efficiencies in operating protocols
No new diversions or impoundments

Chicago Climate Exchange

Rocky Reach Equipment and Operation Efficiencies Qualified as CCX Offset Project s

Projects developed on or after January 1, 1999
Offsets for years 2003-2010
Ownership rights to the environmental attributes

Environmental attributes must be surrendered to CCX to prevent double counting
Must be independently verified by a CCX-approved verifier

Carbon Financial Instrument™ (CFI™) contracts are issued on the basis of displaced electricity at a rate of 0.40 metric tons of CO2 per megawatt hour

Chicago Climate Exchange

Submitted a proposal to the CCX Committee on Offsets (June, 2007)
CCX Committee approved the District as an offset provider (August, 2007)
Verification of offsets by approved CCX verifer (Oct. – Nov., 2007)
CCX Board approves portion of RR hydro as tradable CFIs (offsets) (December, 2007)
First trades on CCX (January, 2008)