§ 315-a. Improvement corporations; right of acquisition. Any corporation formed for the purpose of developing or improving real property, which lays out for public use roads, streets, avenues or highways, upon or through its lands, if unable to agree with the owners of any real property required for the purpose of extending, continuing or connecting such roads, streets, avenues or highways, for the purchase thereof, may acquire title thereto by acquisition in the manner prescribed by the eminent domain procedure law; provided such corporation has the consents of the owners of not less than one-half of all of the land which adjoins or abuts upon, or which will adjoin or abut upon, such roads, streets, avenues or highways, or their extensions, continuations or connections, when completed; and such corporation may lay out and establish such roads, streets, avenues or highways, and the extensions, continuations or connections thereof, and may construct drains or sewers, and such bridges or culverts as may be necessary to maintain the grades of, or for the extension, continuation or connection of, the roads, streets, avenues or highways, so laid out; and may connect such roads, streets, avenues or highways, with or across roads, streets, avenues or highways, belonging to any other corporation or person, but may not disturb the established grades thereof. All lands so taken by acquisition shall be deemed to be acquired for a public use.