Sec. 24-115. Easements.
The inspector and other duly authorized employees of the city bearing proper credentials and identification shall be permitted to enter all private properties through which the city holds duly negotiated easements for the purposes of, but not limited to, inspection, observation, measurement, sampling, repair and maintenance of any portion of the sewage works lying within the easement. All entry and subsequent work, if any, on the easement, shall be done in full accordance with the terms of the duly negotiated easement pertaining to the private property involved.
(Ord. No. 357, art. VIII, § 3, 9-4-79)
"....within the easement."
The law you cited doesn't say anything about the city having authority to expand or move the easement as they wish. The law you cited talks about an existing easement. The story talks about the city wanting an easement different from the existing one, which they found "insufficient." So that dog ain't gonna hunt. Got anything else?