Blackhawk, Ohio

The same ground, surveyed 72 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1914 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.

• 1914 USGS Morrow quadrangle1:62500
• 1916 USGS Morrow quadrangle1:62500
• 1916 USGS Morrow quadrangle1:62500
• 1953 USGS Cincinnati quadrangle1:250000
• 1953 USGS Cincinnati quadrangle1:250000
• 1953 USGS Cincinnati quadrangle1:250000
• 1955 USGS Pleasant Plain quadrangle1:24000
• 1955 USGS Pleasant Plain quadrangle1:24000
• 1957 USGS Cincinnati quadrangle1:250000
• 1968 USGS Pleasant Plain quadrangle1:24000
• 1986 USGS Cincinnati quadrangle1:100000
• 1986 USGS Cincinnati quadrangle1:100000
• 1986 USGS Cincinnati quadrangle1:100000

Museums hold 2,933 specimens collected within 10 miles of Blackhawk between 1878 and 1974: 2,727 Animalia, 161 Fungi, 28 Plantae, 14 Unrecorded, 3 Protozoa. 12 distinct Species records are shown. Collected by 14529, A. Gaufin, A. J. Mix and others. Each is a physical object with a catalogue number, and each entry opens the museum's record. This is what was collected and kept, not a survey of what lives here - nothing can be concluded from a species being absent.

Image	Species	Year	Collected by	Where, as recorded
	Cambarus bartonii (Fabricius, 1798)	1892	H. Smith	Creek About 2 Mile NE Of South Lebanon
	Colinus virginianus virginianus (Linnaeus, 1758)	1878	Collector(s): unknown	Foster Point
	Cambarus rusticus Girard, 1852	1892	H. Smith	Little Miami River, 1 1/2 mi. above South Lebanon
	Donnaldsoncythere Rioja, 1942	1892	H. Smith	Creek About 2 Mile NE Of South Lebanon
	Uncinocythere stubbsi Hobbs & Walton, 1966	1892	H. Smith	Creek About 2 Mile NE Of South Lebanon
	Cathartes aura (Linnaeus, 1758)	1900	Mills, W. C.	Fort Ancient, Warren, Ohio, USA
	Anthophora abrupta Say, 1837	1902	not recorded	Fort Ancient State Memorial, Warren Co., OH, Warren, Ohio, United States
	Bombus citrinus (Smith, 1854)	1902	not recorded	Fort Ancient State Memorial, Warren Co., OH, Warren, Ohio, United States
	Brachiacantha ursina (Fabricius, 1787)	1902	not recorded	Fort Ancient State Memorial, Warren Co., OH, Warren, Ohio, United States
	Coccinella venusta Weise, 1879	1902	not recorded	Fort Ancient State Memorial, Warren Co., OH, Warren, Ohio, United States
	Ectemnius singularis (F.Smith, 1856)	1902	not recorded	Fort Ancient State Memorial, Warren Co., OH, Warren, Ohio, United States
	Euperilampus triangularis (Say, 1829)	1902	not recorded	Fort Ancient State Memorial, Warren Co., OH, Warren, Ohio, United States

All 2,933 specimens within 10 miles, at the Global Biodiversity Information Facility.

The federal mineral resources record lists 1 working within 5 miles of Blackhawk: 1 producer. All of them still produce. What was taken out: Sand and Gravel, Construction. 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 Warren County

The National Weather Service names Blackhawk in 9 storm reports between 2011 and 2025: 4 thunderstorm wind, 3 hail, 1 tornado, 1 flood. 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 Warren 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 1064444. 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.

Specimens. Global Biodiversity Information Facility (GBIF), https://www.gbif.org/. Only records licensed CC0 or CC BY are used. Records licensed CC BY-NC are excluded because this site carries advertising. Images are checked individually and any whose licence is non-commercial, no-derivatives or unreadable is refused.

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.