On Aug. 1, 1994, the ZymoGenetics Lake Union Steam Plant and Hydro House were designated City of Seattle landmarks.

Construction was completed in Jun. 1994. On Aug. 1, the ZymoGenetics Lake Union Steam Plant and Hydro House were designated a City of Seattle landmark, and on Sept. 8, ZymoGenetics dedicated Seattle’s historic Lake Union Steam Plant. The renovated 113,000 s.f. plant doubled Zymo’s current facility footage.