Mahopac Falls, New York

The same ground, surveyed 94 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1892 1986

Matched by testing this settlement's coordinate against the published boundary of every sheet in the United States Geological Survey's historical collection. Each opens the scanned sheet at the Survey.

• 1892 USGS West Point quadrangle1:62500
• 1894 USGS West Point quadrangle1:62500, 3 printings
• 1899 USGS West Point quadrangle1:62500
• 1901 USGS West Point quadrangle1:62500, 12 printings
• 1936 USGS West Point quadrangle1:62500
• 1936 USGS West Point quadrangle1:48000
• 1941 USGS West Point quadrangle1:62500, 3 printings
• 1947 USGS Hartford quadrangle1:250000, 2 printings
• 1947 USGS West Point quadrangle1:62500
• 1948 USGS Hartford quadrangle1:250000, 2 printings
• 1956 USGS Mohegan Lake quadrangle1:24000, 5 printings
• 1961 USGS Hartford quadrangle1:250000
• 1962 USGS Hartford quadrangle1:250000, 3 printings
• 1965 USGS Hartford quadrangle1:250000, 2 printings
• 1986 USGS Bridgeport quadrangle1:100000, 3 printings

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 489 fires within 5 miles of Mahopac Falls between 1993 and 2020, burning about 395 acres in total. 43 started naturally. 52 were recorded as arson. Distance is straight-line from the map coordinates, so a fire counted here may appear on a neighbouring settlement's page as well.

The most recent of them, most recent first, with the day each was reported and the service that recorded it.

Settlements close enough to share some of these fires:

• Stillwater
• Bullet Hole
• Mahopac
• Mahopac Mines
• McLaughlin Acres
• Baldwin Place

Every fire recorded in Putnam County

Regional context, not property-specific evidence. The federal mineral resources record lists 19 workings within 5 miles of Mahopac Falls: 18 past producers, 1 prospect. None of them still produces. What was taken out: Iron, Stone, Manganese, Iron, Manganese. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.

Every working recorded in Putnam County

Regional context, not property-specific evidence. The National Weather Service names Mahopac Falls in 6 storm reports between 1996 and 2023: 2 flash flood, 2 thunderstorm wind, 2 lightning. No death or injury is recorded in these reports. Each account below is quoted exactly as the forecast office filed it, from the NOAA Storm Events Database, and each date opens the federal record of that event.

Every storm recorded in Putnam County

The eight closest, with where each one stands in the county. Distances are straight-line, computed from the Geographic Names Information System coordinates.

Matched on this settlement's Geographic Names Information System number rather than its name, so it cannot be a different place of the same name in another state.

This settlement is recorded in the Geographic Names Information System as feature 956274. The sheet list is computed by point-in-boundary test against the United States Geological Survey's historical topographic inventory. Both are works of the United States government and carry no copyright under 17 U.S.C. 105.

Wildfire. Short, Karen C. 2022. Spatial wildfire occurrence data for the United States, 1992-2020 [FPA_FOD_20221014]. 6th Edition. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2013-0009.6 Collected with United States Government funding and usable without additional permissions or fees.

Mines and quarries. USGS Mineral Resources Data System (MRDS) https://mrdata.usgs.gov/mrds/ A work of the United States government, no copyright under 17 U.S.C. 105.

Storms. NOAA National Centers for Environmental Information, Storm Events Database https://www.ncei.noaa.gov/stormevents/ A work of the United States government, no copyright under 17 U.S.C. 105. Narratives are quoted verbatim from the National Weather Service report and are not edited or summarised.