Section 3. It shall be lawful for said burgess and council their officers, engineers and agents to enter upon any lands necessary for the purpose of surveying and locating the route, for conducting said water to the proper point or points in said borough, and placing down the necessary pipes or conductors, and to thereafter repair, improve or enlarge the same, and to take and hold possession of so much land as shall be required for constructing reservoirs and keeping the same in repair.