File:Northern Railroad (NH) (1890) (Constituents).svg
Legend
Northern Railroad (Main Line)
Northern Railroad (Bristol Branch) formerly Franklin and Bristol Railroad
Concord and Claremont Railroad (Main Line) formerly Merrimac and Connecticut Rivers Railroad
Concord and Claremont Railroad (Main Line) formerly Sugar River Railroad
Concord and Claremont Railroad (Hillsborough Branch) formerly Contoocock River Railroad
Peterborough and Hillsborough Railroad
Design Constructed using OSM administrative boundaries and tracing the Northern lines described by Henry V. Poor in Poor's Manual of Railroads, 1874–75 (for the connection between the Merrimac and Connecticut Rivers Railroad and the Sugar River Railroad) and Poor's Manual of Railroads, 1888 (for all other railroads) using the following georeferenced USGS topographic maps in GeoTIFF format (accessed using TopoView):
- USGS 1:62500-scale Quadrangle for Hanover, VT 1908
- USGS 1:62500-scale Quadrangle for Mascoma, NH 1932
- USGS 1:62500-scale Quadrangle for Cardigan, NH 1930
- USGS 1:62500-scale Quadrangle for Mount Kearsarge, NH 1928
- USGS 1:62500-scale Quadrangle for Penacook, NH 1927
- USGS 1:62500-scale Quadrangle for Concord, NH 1927
- USGS 1:62500-scale Quadrangle for Holderness, NH 1927
- USGS 1:62500-scale Quadrangle for Claremont, NH 1929
- USGS 1:62500-scale Quadrangle for Sunapee, NH 1907
- USGS 1:62500-scale Quadrangle for Hillsboro, NH 1929
- USGS 1:62500-scale Quadrangle for Peterboro, NH 1900