Tennessee State Route 309
| Union Grove Road | ||||
SR 309 highlighted in red | ||||
| Route information | ||||
| Maintained by TDOT | ||||
| Length | 2.6 mi (4.2 km) | |||
| Existed | July 1, 1983–present | |||
| Major junctions | ||||
| West end | I-75 near Niota | |||
| East end | US 11 in Niota | |||
| Location | ||||
| Country | United States | |||
| State | Tennessee | |||
| Counties | McMinn | |||
| Highway system | ||||
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State Route 309 (SR 309), also known as Union Grove Road, is a 2.6-mile-long (4.2 km) east–west state highway in McMinn County, Tennessee. It serves as the primary access road from Interstate 75 (I-75, Exit 56) to the town of Niota.