Preparing for the next 100 Years!
During 2019, McMillen Jacobs made considerable progress on this significant powerhouse renovation project. In our role as Portland General Electric’s (PGE) CM/GC Contractor, our team completed design and constructability reviews, value engineering, risk assessments, dewatering plans, and procurement of long-lead items. We analyzed alternatives for the selective demolition which included options for salvaging components that will be integrated into the commemorative park that PGE plans to build at the Faraday Reservoir.
After careful preparations, our crews removed the five generators inside the powerhouse and completed the strategic demolition of the powerhouse and the penstocks from the steep hillside. We also completed the demolition of the storage warehouse, the intake racks, the intake housing structures, and intake gear/actuators that have been in service since the original installation in 1907.
We are currently excavating the powerhouse foundation which will be approximately 50 feet deep and filled with concrete and structural fill to obtain the elevation required. We also finalized the design and recently began placement of the foundations for the upper penstock supports.
In 2020-2021, work will be completed for the construction of a new reinforced concrete powerhouse (multi-story 122’x60’); installation of 2 higher-efficiency vertical Kaplan turbine/generator units, welded steel penstock, and trash rake/rack system; development of new access roads and a bridge; and integration of all balance-of-plant mechanical and electrical systems including the tie-in to the grid. Estimated completion in 2021 will produce an efficient and safe facility to use for the next 100+ years.
The last 100 years…
PGE’s first dam on the Clackamas River began operation in 1907 as the Cazadero Dam. It was rebuilt after damage from a 1964 flood. For more than a century, this powerhouse has been generating enough electricity to power more than 17,000 homes. As part of PGE’s continued investment in upgrades to their Clackamas hydro system, the Faraday Powerhouse is being decommissioned. The new powerhouse will enhance operational safety and improve generation efficiency, assuring a stable power supply for decades to come for PGE customers.
For further information on this historic project over the last 100 years, watch this video: