 A $ 9 @.@ 3 million county bond paid for seismic improvements between 1991 and 1994 . A new tower was constructed on the north side of the building to create a buttress for the original structure . The addition was designed by architects Zimmer Gunsul Frasca , and received an award from the American Institute of Architects for is innovate design that was inline with the building 's historical facade . The project created 70 @,@ 000 sq ft ( 6 @,@ 500 m2 ) of additional space that was not initially occupied . As the medical organization struggled financially , attempts to lease at least 155 @,@ 000 sq ft ( 14 @,@ 400 m2 ) of the building failed over the course of several years . With medical facilities continuing to occupy the bottom two floors of the building in 1998 , Amazon.com signed a sublease for $ 1 @.@ 5 million a year through 2010 . 
