This subgroup contains construction statements, locomotive statements, correspondence pertaining to the consolidation of the B&MRR, Iowa and CB&Q, pool statements, timetables, vouchers, and other miscellaneous papers. Of note is a printed report by Thomas Doane on bridging the Missouri River. Correspondents include C. E. Perkins, Robert Harris, J. M. Walker, J. N. Denison, and J. W. Brooks.