The urban county government expressly reserves the right to construct sewers and connections; to permit connection of private sewers with main sewers; to lay water or gas mains; and to grant permits for water or gas pipes at any time prior to the completion of the subgrade, or the urban county engineer may order the contractor to do the same; and the urban county government reserves the right to suspend work on any section at any time during the improvement of same for the purpose above stated; and the contractor shall not interfere with or place any impediment in the way of any person who may be engaged in the construction of such sewer, or in laying such gas or water mains, or making connections therewith, or doing other work above specified. In any such case the contractor shall not be entitled to any damage for the digging up of the streets, or for the delay, but shall be allowed and paid by the urban county government for any work and material made necessary on his part at the actual cost thereof plus fifteen (15) percent; and no part of such cost shall be estimated in the cost of improvement of such street, nor shall the contractor be held responsible for damage to any pipes, sewers, conduits or other such installations that are above subgrade, but he shall use all reasonable care in preventing damage thereto. The contractor's time for completing his contract shall be extended as many days as he is thus delayed.
If, in the improvement of a street, it becomes necessary to change the grade or location of any water pipe, gas pipe or conduit, or any other like thing, and if the person or company owning same shall fail upon notice to change same, such change shall be made to the proper line, grade or location by the contractor, and the urban county government shall pay him therefor; and such person or company shall be held liable to reimburse the urban county government.