Ariz. Rev. Stat. § 48-2018 – Performance of work; methods; calls for bids; modification of specifications

A. The board of directors shall employ qualified water or sanitation engineers necessary to superintend the performance of work specified in the approved report of the survey or plan. The work or any portion thereof may be performed, under the direction of the engineers employed for that purpose, in any of the following ways, as ordered by the board of directors:
1. 1. By purchasing the material and performing the work.
2. 2. By purchasing the material and letting a contract for performance of the work.
3. 3. By purchasing a portion or none of the material and letting a contract for furnishing the balance or all of the material and performance of the work.
B. A contract for performance of work or for furnishing material shall be let to the lowest responsible bidder submitting a sealed bid in response to a call for bids published once each week for two consecutive weeks in a newspaper of general circulation in the county. The call for bids shall include detailed plans and specifications covering the work to be done and the materials to be furnished. If materials to be purchased without the letting of a contract cost ten thousand dollars or more, they shall be purchased from the lowest responsible bidder after publication of a call for bids as provided by this subsection.
C. All work recommended in the approved report shall be performed in conformity with the plans and specifications contained in the report unless the board of directors by a two-thirds vote adopts a resolution declaring that the interest of the district requires a modification of or departure from the report, and specifying the modification or departure.