Colorado Revised Statutes Title 37. Water and Irrigation § 37-24-102. Contractor--bond--engineer

The person to whom a contract may be awarded shall execute a bond in the penal sum of not less than ten percent of the contract price, with surety to be approved by the board of directors, payable to the drainage district, conditioned for the faithful performance of the contract. All work shall be done under the direction and to the satisfaction of the engineer employed by the drainage district subject to approval by the board of directors.