Before commencing work upon any private drains, sewers, trenches, or ditches in the streets or alleys of the city, the person desiring to make the excavation shall first file with the Clerk a bond theretofore approved by the Mayor, in the penal sum not less than $1000, which bond, among other things, shall be conditioned for the prompt filling up and restoration of any break or opening made in any part of the streets or alleys, in as good condition as before; and for the repair of the same from time to time, until the surface thereof shall conform to the proper grade of streets and alleys. It shall be further conditioned to save and keep the city harmless for all loss, damage or injury to persons or property which may occur by reason of the digging, construction or maintenance of drains, sewers, trenches, or ditches, which bond shall be given whether the drains, sewers, trenches or ditches may be constructed by a licensed sewer builder or otherwise.
(1963 Code, § 8-4-2)