SDCL § 9-42-7: Combining improvements for purposes of plans and contract--Allocation of costs.

Two or more local improvements, the proceedings for which have been or are to be instituted separately, due to differences in the areas to be served by such improvements or the type of work involved therein, may be governed by a single set of plans and specifications and a single contract, and such plans and specifications and contract may also include work inside or outside of the municipality which is to be financed solely by such state or federal agency, if such method of advertising and award shall be deemed most feasible and economical by the governing body and by said agency, but in this event the governing body shall take the necessary steps to assure that the contract and incidental costs are allocated on a reasonable basis to the respective improvements involved.