Any application for water service which requires an extension of existing water mains shall be accompanied by a request in letter form for such extension. The request shall contain information on the location at which water service is required, an estimate of the monthly water requirement, and the uses to which the water will be put. Requests for extension of water mains shall be approved only by the council which may impose any conditions or requirements which the council deems necessary or advisable for the public health, welfare and safety and for the orderly growth and development of the city. The cost of the extension of any main will be borne by the applicant. The extension will be constructed by the city maintenance crews, if circumstances permit, or by a contractor approved by the superintendent and the city engineer. All installed pipe must be checked by the superintendent prior to backfilling. The city will assist the contractor in planning to the extent of giving code requirements, location of existing utilities, lines, etc. Costs for the review by the city engineer will be paid by the applicant. If the main extension is constructed by the city maintenance crews, the applicant shall deposit with the city prior to construction either in cash or bond the amount estimated by the superintendent as the cost of the extension. If a private contractor is employed by the applicant, the applicant shall make all financial arrangements with the contractor and shall deposit with the city in cash or bond an amount equal to the superintendent’s estimate of the cost of repairing all city streets which will be disturbed by construction. The bond shall be returned upon final approval of construction by the superintendent. The contractor shall carry liability insurance naming the city as an insured party in an amount to be determined by the council in approving the request for main extension. (Prior code § 3.420)