add locks to Enlarged Erie Canal in Cohoes NY
improve, old Erie and originial Champlain
add section of old Champlain canal still visible in modern imagery
correct erie canal through cohoes to include lock identified by ruins next to NY 787
add erie canal segments to relations, extend original erie canal through cohoes
complete first Croton aqueduct between Yonkers and Highbridge
complete Erie Canal between Watervliet (West Troy) and Albany
extend erie canal in Watervliet/Cohoes/Green Island area
extend original Erie Canal between Albany and Watervilet
add section of original Erie Canal in West Troy (now Watervliet)
add lock from the original erie canal
add lock 4 of the enlarged erie canal
add old alignment of Everett Road
improve end_date for viaduct, improve positioning
Watervliet Avenue Viaduct, torn down sometime after 1952
improve footprint for 3rd depot. add Troy Hospital
improve footprints for 3rd depot, RPI Main Building