8 New Project HYDRONEWS No. 30 John Day Lock and Dam by Jack Heaton [email protected] View of the dam USA – In June 2016, the US Army erators were originally provided by turbine replacement and unit rehabili- Corps of Engineers, Portland District, ANDRITZ HYDRO’s predecessor com- tation project for the same customer. awarded a contract to ANDRITZ HYDRO panies. Should the fifth unit option be exer- for the upgrade of the Kaplan turbine cised, the entire project is expected to hubs of the John Day Lock and Dam hy- After a half century of operation, some be completed by 2021. dropower station, in the northwest of of the turbines have passed or are near- the United States of America. ing the end of their design lives, espe- TECHNICAL DATA cially the hub internals. This contract in- Output 16 × 135 MW With a total installed capacity of cludes work on four units and a fifth unit Voltage 13.8 kV 2,160 MW, HPP John Day Lock and as an option. ANDRITZ HYDRO will dis- Head 30 m Dam is the fifth largest hydropower facil- assemble the entire turbine-generator Speed 90 rpm ity in the United States. It is fed by Lake unit, repair the Kaplan runner on-site, Runner Diameter 7,925 mm Umatilla, a reservoir running 123 km up replace as-needed wearing compo- Av. annual production 8,418 GWh to the foot of HPP McNary Dam. nents, install new runner hub internals, refurbish as-required mechanical com- Primary construction works of the ponents off-site, reassemble the unit, run-of-river power plant began in 1958 and perform testing and commissioning and were completed in 1971, at the after the installation. Following the re- time making it the newest dam on the pair, all the runners under the contract lower Columbia River with the highest will function as double-regulated Kaplan lift (34 m) among all locks in the United runners. States. The powerhouse is equipped with a total of 16 units, each with an out- Prior to this award, ANDRITZ HYDRO put of 135 MW. All turbines and gen- successfully completed the Hills Creek .