Mo. Rev. Stat. § 226.905

A minimum of ten percent of all contracts entered into by the Missouri highways and transportation commission in the design and construction of projects financed in whole or in part with federal funds shall be entered into with minority-owned construction companies or businesses. If there are not a sufficient number of qualified minority business enterprises in a geographic area to meet the ten percent goal established in this section, then the contract recipient shall make a good faith effort to solicit and use subcontracts with minority business enterprises located within reasonable proximity to the geographic area in order to meet the ten percent goal established in this section or increase minority business enterprise participation in other projects.