improved end date estimate for upper Albany Basin
merge Enlarged Erie Canal multipolygon relations
model Erie Canal, Enlarged Erie Canal Locks
Enlarged Erie Canal Banks, Crescent South to the power canal
improve Lock 4, Enlarged Erie Canal
improve enlarged erie canal, erie canal, Cohoes NY
improve enlarged erie canal, erie canal, Cohoes NY
tweaks to Harmony Mill Building 3, correct end date
improve Enlarged Erie Canal in Cohoes, NY
add image for Harmony Mill Building 4
add image for Harmony Mill Office
add image for Harmony Mill Building 4
tweak start dates, use temp start/end_date_edtf tags
tweak start dates, use temp start/end_date_edtf tags
improve Hzarmony Mills, Erie Canal in Cohoes NY
improve harmony mills site, cohoes ny
pre 1911 Mohawk River moving west from Crescent