Listed on the National Register of Historic Places in 1992. 16 historic topographic surveys show this location, the earliest from 1892.
“Hopson-Swan Estate is a national historic district and estate located at Sparkill in Rockland County, New York. It encompasses three contributing buildings and one contributing structure.”
Wikipedia article Hopson-Swan Estate, CC BY-SA 4.0.
One of 93 National Register listings published here for Rockland County · listed in 1992 · category: District.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service
Regional context, not property-specific evidence. The federal wildfire occurrence database lists 497 fires within 5 miles of Hopson-Swan Estate between 2000 and 2020, burning about 772 acres in total. 52 started naturally. 43 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.
| Reported cause | Fires |
|---|---|
| Missing data/not specified/undetermined | 298 |
| Natural | 52 |
| Arson/incendiarism | 43 |
| Smoking | 43 |
| Recreation and ceremony | 29 |
| Equipment and vehicle use | 12 |
| Debris and open burning | 12 |
| Power generation/transmission/distribution | 4 |
| Misuse of fire by a minor | 3 |
| Other causes | 1 |
The most recent of them, most recent first, with the day each was reported and the service that recorded it.
| Date | Cause | Size | Reported by | Name on the report |
|---|---|---|---|---|
| 9 September 2015 | Smoking | under an acre | Fire Department of New York | N/A |
| 9 September 2015 | Missing data/not specified/undetermined | under an acre | Fire Department of New York | N/A |
| 9 September 2007 | Missing data/not specified/undetermined | under an acre | Fire Department of New York | not named |
| 9 September 2003 | Smoking | under an acre | Fire Department of New York | not named |
| 8 September 2013 | Missing data/not specified/undetermined | under an acre | Fire Department of New York | N/A |
| 8 September 2005 | Missing data/not specified/undetermined | under an acre | Fire Department of New York | not named |
| 8 September 2005 | Missing data/not specified/undetermined | under an acre | Fire Department of New York | not named |
| 7 September 2005 | Missing data/not specified/undetermined | under an acre | Fire Department of New York | not named |
Regional context, not property-specific evidence. The federal mineral resources record lists 5 workings within 5 miles of Hopson-Swan Estate: 3 past producers, 1 prospect, 1 producer. 1 still produces. What was taken out: Sand and Gravel, Construction, Stone, Crushed/Broken, Iron, Molybdenum. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.
| Where | Site | Commodity | Status | Recorded |
|---|---|---|---|---|
| Dobbs Ferry Plant | Molybdenum, Rhenium, Tungsten, Tantalum | Producer | ||
| North Jersey Iron Ore Co. Prospect | Iron | Prospect | ||
| Taverniere & Johnson | Stone, Crushed/Broken | Past Producer | 1897, 1908 | |
| Sparkill Pit and Plant | Sand and Gravel, Construction | Past Producer | Sedimentary | |
| Sparkill Plant | Sand and Gravel, Construction | Past Producer |
Regional context, not property-specific evidence. The National Weather Service names Sparkill, the town this property stands in, in 6 storm reports between 2008 and 2021: 3 thunderstorm wind, 1 lightning, 1 flash flood, 1 hail. 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.
| When | Event | Place named | Harm | What the report says |
|---|---|---|---|---|
| July 2010 | Thunderstorm Wind | Sparkill | $10,000 | A tree was reported down across a car at 283 Kings Highway in Orangeburg. |
| July 2011 | Lightning | Sparkill | $5,000 | Lightning struck a substation, knocking out power to over 2500 people. |
| June 2021 | Thunderstorm Wind | Sparkill | $1,000 | Large branches were reported down. |
| June 2020 | Hail | Sparkill | - | Dime sized hail reported on half mile southwest of Piermont, near the Piermont Sparkill border. |
| August 2014 | Flash Flood | Sparkill | - | Multiple water rescues were needed after vehicles became stuck in high water on Route 303 in Tappan. |
| March 2008 | Thunderstorm Wind | Sparkill | - | A Tree and wires were reported downed on Cedar Street. |
United States Geological Survey topographic sheets whose coverage includes this point. Matched by taking the coordinate the National Park Service records for this property, then testing that coordinate against the published boundary of every sheet.
Other National Register properties close enough to walk or drive between, ordered by distance from this one. Both positions come from the same geocoding pass that matched these properties to their map sheets.
| Photograph | Property | Distance | Listed |
|---|---|---|---|
 | Dederer Stone House-Stonehurst | 0.4 miles | 2002 |
 | William Ferdon House | 0.6 miles | 2011 |
 | Rockland Road Bridge | 0.6 miles | 2005 |
 | Haddock's Hall | 0.6 miles | 1991 |
 | Christ Church | 0.6 miles | 2011 |
 | First Reformed Church | 0.6 miles | 2015 |
| National Archives record | The nomination case file for reference 92001562 in Record Group 79. |
| Wikipedia article | Community-written account of this property, licensed CC BY-SA. |
| Rockland County | All 93 listed properties in this county. |
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