Whenever a common sewer is constructed under the provisions of this chapter [this article], the town council shall cause a plat of the layout of the same and of the estates abutting upon the same to be filed in the office of the town clerk, which said plats are hereby declared to be public records for determination of the description of the estates assessed for such construction of such sewers. (P.L. 1958, ch. 138, § 1.)