Specifications and invitations. 3997. Earth lining, station 287+00 to station 315+00, station 346+00 to station 390+00, station 413+00 to station 507+75, station 635+00 to station 645+33, and relocation and earth lining, station 617+81 to station 632+46.9 Bk., Courtland Canal, Superior-Courtland unit, Bostwick Division, Nebraska-Kansas, Missouri River Basin project, supplemental notice 1.