34.9. A contractor was building a highway underpass in an urban area. The contractstated 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 inthe specifications. (a) Is maintenance and relocation of this sewer her respon-sibility even though she had visited the site before bidding, as required by thespecifications? (b) Can she properly claim extra compensation for this work?Explain.