N.J. Stat. § 27:19-22: Changing course of stream; acquisition of property

When a board of chosen freeholders is about to construct a bridge over a stream which passes the location of the proposed bridge diagonally, and shall determine by resolution that it is advisable to change the course of the stream in so far as it may be necessary to cause it to pass under the location of the proposed bridge at right angles thereto, it may do so and may acquire by gift, purchase or condemnation any property or right of ways over which the stream shall pass by reason of the diversion of its course.