K+A conducted a geotechnical engineering study for the Civic Center Office Building located adjacent to the existing Annex One municipal building within the block bounded by 14th and 15th Streets, Court Place, and West Colfax Avenue in Denver, Colorado. The study was conducted for the purpose of developing geotechnical engineering recommendations for the project. The design-build team requested the study even though a previous study had already been performed. The additional study was requested to optimize the allowable foundation capacities and to further evaluate other geotechnical issues such as shoring, dewatering, and slab heave potential for the lowermost parking level slab, which would be placed near potentially expansive claystone bedrock.

The building consists of thirteen above-grade levels and three levels of below-grade parking. The lowest parking level floor is approximately 38 feet below street level and occupies a footprint of approximately 200 feet by 400 feet. The above-grade portion of the building has a generally elliptical footprint and is roughly centered over the rectangular below-grade parking levels. The Annex One building will be renovated and assimilated into the first four floors of the new building. The completed building will join the Capitol building and City and County building in framing Denver's Civic Center Park. K+A recommended the building be founded on straight-shaft drilled piers extending into the Denver Formation bedrock. The largest piers were designed for an end-bearing capacity of 80,000 psf.