Mo. Rev. Stat. § 67.5038: Purchases in excess of $10,000 by lowest and best bid standard.

All purchases by a district in excess of ten thousand dollars used in the construction or maintenance of any public recreational facility, trail, park, or greenway in that district shall be made pursuant to the lowest and best bid standard as provided in section 34.040 or pursuant to the lowest and best proposal standard as provided in section 34.042. The board of any district shall have the same discretion, powers and duties as granted to the commissioner of administration by sections 34.040 and 34.042.