A Contractor was building a highway underpass in an urban area. The contract stated that she was to maintain traffic and to maintain and relocate all utilities. She encountered an

old sewer that was not shown on the plans or mentioned in the specifications. (a) Is maintenance and relocation of this sewer herresponsibility even though she had visited the sitebefore bidding, as required by the specifications? (b) Can she properly claim extra compensation forthis work?