Ohio State Route 721

State Route 721
Route information
Maintained by ODOT
Length:	17.91 mi[1] (28.82 km)
Existed:	1937[2][3] – present
Major junctions
South end:	SR 49 near Potsdam
	US 36 near Bradford
North end:	SR 185 near Bradford
Location
Counties:	Miami, Darke
Highway system
Ohio Highways Interstate U.S. State Scenic ← SR 720 SR 722 →

State Route 721 (SR 721) is a north–south state highway located in the western portion of the U.S. state of Ohio. The southern terminus of SR 721 is at a T-intersection with SR 49 approximately 2.75 miles (4.43 km) south of the village of Potsdam. Its northern terminus is also at a T-intersection, this time with SR 185 on the Darke–Miami County Line nearly 1.50 miles (2.41 km) north of Bradford.

Route description

Along its way, SR 721's path takes it through southwestern Miami County, then along the border between Darke and Miami Counties. There is no section of SR 721 that is included within the National Highway System (NHS). The NHS is a network of highways deemed to be most important for the country's economy, mobility and defense.^[4]

History

The SR 721 designation was assigned in 1937. Throughout its history, the route has maintained the same alignment in the general vicinity of the boundary between the counties of Darke and Miami. Originally, SR 721 was an unpaved roadway from its southern terminus at SR 49 to its junction with US 36. The portion from that point through Bradford to its northern terminus at SR 185.^[2][3] One year after its assignment, SR 721 was paved between SR 49 and Laura.^[5] By 1940, the remaining gravel portion of the highway between Laura and US 36 was paved.^[6][7]

Major intersections

County	Location	mi[1]	km	Destinations	Notes
Miami	Union Township	0.00	0.00	SR 49 – Dayton, Greenville
	Laura	5.79	9.32	SR 571 east / Pemberton Road	Southern end of SR 571 concurrency
	Union Township	6.14	9.88	SR 571 west	Northern end of SR 571 concurrency
	Newton Township	9.59	15.43	SR 718 east / CR 74 – Pleasant Hill	Western terminus of SR 718
Darke–Miami county line	Adams–Newberry township line	14.80	23.82	US 36 – Greenville, Covington
		17.91	28.82	SR 185 – Piqua, Versailles
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus

References

Route map: Bing / Google

1. Ohio Department of Transportation. "Technical Services Straight Line Diagrams". Retrieved 2011-04-10.
2. Official Ohio Highway Map (MrSID) (Map). Cartography by ODOH. Ohio Department of Highways. 1936. Retrieved 2011-04-07.
3. Official Ohio Highway Map (MrSID) (Map). Cartography by ODOH. Ohio Department of Highways. 1937. Retrieved 2011-04-07.
4. National Highway System: Ohio (PDF) (Map). Federal Highway Administration. December 2003. Retrieved 2011-04-07.
5. Official Ohio Highway Map (MrSID) (Map). Cartography by ODOH. Ohio Department of Highways. 1938. Retrieved 2011-04-07.
6. Ohio Highway Map (MrSID) (Map). Cartography by ODOH. Ohio Department of Highways. 1939. Retrieved 2011-04-07.
7. Ohio Highway Map (MrSID) (Map). Cartography by ODOH. Ohio Department of Highways. 1940. Retrieved 2011-04-07.