§ 52. Maps and plans to be filed. The board of transportation shall cause three similar maps or plans to be made of each parcel of property which it may deem necessary so to be acquired, or to which there may be appurtenant property rights necessary so to be acquired or extinguished, designating each of such parcels by a number. Upon each map or plan so made or in a memorandum accompanying it and to be deemed part thereof such board shall cause to be clearly indicated the particular property rights to be acquired or extinguished for the purposes of this chapter, together with the assessed valuation of the fee on the tax rolls of the city for each of the three years preceding the date of the approval and adoption of such map or plan by such board, in relation to each and every piece or parcel of property described upon such map or plan. Such board shall have power to cause a triplicate set of maps or plans and memoranda as herein provided for to be made as often and at such times as they shall determine, and each set of maps or plans and memoranda so made shall contain the particulars above enumerated within such district as such board shall in each case provide. The maps or plans and memoranda provided for by this section, when approved and adopted by such board, shall have written thereon a certificate of such approval, signed by the members of the board adopting and approving it, and one copy thereof shall be filed in the office of the president of the borough, there to remain as a public record, and the other two sets of maps or plans and memoranda shall be transmitted to the corporation counsel. Such board, from time to time, may make and file further maps or plans and memoranda amending those already filed, but not so as to defeat or impair any property or interest which shall have been already acquired, or to revive any property right which may have been already extinguished by the city.
