Extra work may arise in connection with any project mentioned in this article and not particularly provided for in the plans, specifications, estimates, bids and contracts; and such extra work shall be performed by the contractor at the direction of the engineer at cost of labor and materials and overhead including superintendence as set forth in the plans, specifications, or construction contract, such amount to be included in the assessment for the project (but not exceeding in the aggregate the estimated maximum special benefits to any tract so assessed) or to be paid out of the general or other funds of the district available therefor, in the discretion of the board.L. 69: p. 793, § 130. C.R.S. 1963: § 89-21-130.
Colorado Legal Code