Ridgewood Heights, Ohio

The same ground, surveyed 78 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1908 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.

• 1908 USGS Miamisburg quadrangle1:62500
• 1953 USGS Cincinnati quadrangle1:250000
• 1953 USGS Cincinnati quadrangle1:250000
• 1953 USGS Cincinnati quadrangle1:250000
• 1955 USGS Miamisburg quadrangle1:24000
• 1955 USGS Miamisburg quadrangle1:24000
• 1957 USGS Cincinnati quadrangle1:250000
• 1965 USGS Miamisburg quadrangle1:24000
• 1965 USGS Miamisburg quadrangle1:24000
• 1965 USGS Miamisburg quadrangle1:24000
• 1965 USGS Miamisburg quadrangle1:24000
• 1986 USGS Dayton quadrangle1:100000
• 1986 USGS Dayton quadrangle1:100000

An account from the chapter on Dayton city, in the words of 1882.

The county history of 1882 has no passage naming this settlement, which was common for the smaller places. Its township is covered in full.

Museums hold 600 specimens collected within 10 miles of Ridgewood Heights between 1835 and 1975: 442 Animalia, 88 Plantae, 61 Fungi, 4 Protozoa, 4 Chromista, 1 Unrecorded. 12 distinct Species records are shown. Collected by A JOHN, A JOHN AND W E DUELLMAN, A. E. Foeerste 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
	Hypericum mutilum subsp. mutilum	1835	Joseph C. Frank	Germantown
	Ambrosia artemisiifolia L.	1881	Foerste AF
	Geaster limbatus Fr.	1883	A. E. Foeerste	Dayton
	Platanthera leucophaea (Nutt.) Lindl.	1836	C. W. Short	Dayton
	Erythronium americanum Ker Gawl.	1837	van Cleve, John W.	3 mi. north of Dayton
	Hydrophyllum macrophyllum Nutt.	1838	J. W. Van Cleve	Dayton
	Allium canadense L.	1839	not recorded	Dayton. 1 mi. northeast.
	Cardamine L.	1839	Sanders, Alfred; J.J. Nagel, J.G. Haupt.	Dayton. 1 mile east.
	Cassia marilandica L.	1839	Sanders, Alfred	Dayton
	Cynoglossum officinale L.	1839	not recorded	Dayton. Suburbs E.
	Iris versicolor L.	1839	not recorded	Dayton. 2 mi. south
	Nuphar advena (Aiton) Aiton	1839	Sanders, Mrs.; J.G. Haupt	Dayton

All 600 specimens within 10 miles, at the Global Biodiversity Information Facility.

The federal mineral resources record lists 17 workings within 5 miles of Ridgewood Heights: 9 past producers, 7 producers, 1 plant. 8 still produce. What was taken out: Sand and Gravel, Construction, Limestone, General, Stone, Crushed/Broken. 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 Montgomery 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 1056490. 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.