In making excavations in streets, alleys, or sidewalks for the purpose of installing pipe, or making repairs, the paving, stones, and earth must be removed and deposited in a manner that will occasion the least inconvenience to the public and provide for adequate drainage. No person shall leave an excavation made in the street, alley, or sidewalk open at any time without a barricade, and during the night, warning lights. After the house sewer is laid, the public ways and property shall be restored to good condition. If the excavation in the public ways and property is left open or unfinished for a period of twenty-four (24) hours or more, the Maintenance Superintendent shall have the duty to finish or correct the work, and all expenses so incurred shall be charged to the owner, occupant, or lessee of the property. All installations or repairs of pipes require two (2) inspections by the Superintendent. The first (1st) inspection shall be made when connections or repairs are complete and before the pipes are covered. The second (2nd) inspection shall be made after the dirt work is completed and the service restored. It is the customers responsibility to notify the Superintendent at the time the work is ready for each inspection. All installation shall be done under the supervision and strictly in accordance with the rules, regulations, and specifications for such installation prescribed by the Superintendent; provided, that the said rules, regulations, and specifications have been reviewed and approved by the Governing Body. (Ref. 18-503 RS Neb.)