Walnut Grove, Ohio

The same ground, surveyed 71 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1915 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.

• 1915 USGS Kenton quadrangle1:62500
• 1944 USGS Kenton quadrangle1:62500
• 1950 USGS Marion quadrangle1:250000
• 1961 USGS Kenton quadrangle1:24000
• 1961 USGS Kenton quadrangle1:24000
• 1961 USGS Kenton quadrangle1:24000
• 1962 USGS Marion quadrangle1:250000
• 1966 USGS Marion quadrangle1:250000
• 1966 USGS Marion quadrangle1:250000
• 1966 USGS Marion quadrangle1:250000
• 1986 USGS Marion quadrangle1:100000
• 1986 USGS Marion quadrangle1:100000

The county-history sources names this settlement in its chapter on Pleasant Township. These are the passages that mention it, exactly as the scans read.

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 5 fires within 5 miles of Walnut Grove between 2002 and 2002, burning about 1 acres in total. None started naturally. None was 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:

• Grant
• Kenton
• Westview Estates
• Blanchard
• Bridgeport
• McVitty

Every fire recorded in Hardin County

Regional context, not property-specific evidence. Museums hold 138 specimens collected within 10 miles of Walnut Grove between 1910 and 1973: 119 Animalia, 19 Fungi. 12 distinct Species records are shown. Collected by ?, Anson A. Hinkley, Bartholomew E. 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
	Ustilago tritici (Bjerk.) Rostr.	1923	W.G. Stover	Kenton
	Mycosphaerella dearnessii M.E.Barr	1931	Curtis May	State Forest at Steece
	Procambarus blandingii (Harlan, 1830)	1939	J. Pelton	Pond near Kenton
	Guignardia bidwellii (Ellis) Viala & Ravaz	1910	Heckathorne H. E.	Kenton
	Laestadia bidwellii (Ellis) Viala & Ravaz	1910	Heckathorne H. E.	Kenton
	Puccinia asterum (Schwein.) F.Kern	1913	Bartholomew E.	Kenton
	Puccinia caricis-solidaginis Arthur	1913	E. Bartholomew	Kenton
	Puccinia dioicae Magnus	1913	Bartholomew, Elam T	Kenton
	Puccinia extensicola Plowr.	1913	E. Bartholomew	Kenton.
	Elimia semicarinata (Say, 1829)	1914	Anson A. Hinkley	Scioto River, Kenton, near headwaters, North America
	Eupelmidae	1917	VL Wildermuth	Kenton
	Limenitis arthemis astyanax (Fabricius, 1775)	1925	not recorded

All 138 specimens within 10 miles, at the Global Biodiversity Information Facility.

Regional context, not property-specific evidence. The federal mineral resources record lists 2 workings within 5 miles of Walnut Grove: 1 past producer, 1 producer. 1 still produces. What was taken out: Limestone, General. 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 Hardin County

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

This settlement is recorded in the Geographic Names Information System as feature 1047532. 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.

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.