Under a federal style Type I$/$Type II Differing Site Conditions clause, who is responsible for the timely removal, relocation, or protection of any existing main or trunkline utility facilities on a project site where such utilities are not shown accurately on the Construction Drawings and could not be observed during a site visit?

engineer$/$architect of design

construction manager

general contractor

Public Agency$/$owner of the project

Utility company who owns the utility line