Statement of Significance (as of designation - July 5, 1984):
Erected in 1906-08, this reinforced concrete building houses the last operational examples of the Curtis Vertical Steam Turbogenerator, the first type of large-scale steam turbine developed. This new technology established General Electric as a leader in the manufacture of steam turbines. The plant also exemplifies facets of the history of urban power use and development.

Condition:
King County and the Federal Aviation Administration plan to extend the neighboring Boeing Airfield.

IInterested parties continue to work out compliance issues surrounding the extension of the runway of Boeing Field adjacent to the Steam Plant. A Memorandum of Agreement is in place that outlines requirements of the upgrading of windows for noise abatement. Owners continue to work on details surrounding access to the plant and other planning issues outlined in the project Environmental Assessment/Environmental Impact Statement for Proposed Master Plan Improvements at the airfield.

Recommendation/Change since last report:
NPS will continue to work with other interested parties in the implementation of MOA’s appropriate in guiding project work. Routine contact is provided through regularly schedule review meetings of the planning initiatives and compliance requirements associated with the project.