Kansas is preparing to start replacing the copper roof and dome of its Statehouse.

The work is an addition to an ongoing renovation of the building that has pushed the project’s projected cost to $319 million.

The Topeka Capital-Journal reports that 14 companies have applied for permission to bid on the roof and dome work, and only one is headquartered in Kansas. The work is expected to cost more than $21 million, and state legislators authorized bonds to cover the expenditure earlier this year.

The project has received intense criticism over projected costs that are more than triple some early estimates.

The state hadn’t initially planned to replace the aging copper on the roof and dome. Instead, it was repairing leaks, cracks and brittle joints.