U.S. Route 521
|Length||177.3 mi (285.3 km)|
|Existed||1932 – present|
|South end||US 17 in Georgetown, SC|
|North end||I-485 in Charlotte, NC|
|States||South Carolina, North Carolina|
|Counties||SC: Georgetown, Williamsburg, Clarendon, Sumter, Kershaw, Lancaster
U.S. Route 521 (US 521) is a north–south United States highway that traverses 177.3 miles (285.3 km), from Georgetown, South Carolina to Charlotte, North Carolina. Though numbered as a daughter route of U.S. Route 21, it does not actually intersect its parent or any of its sibling routes, though it is in the same general part of the U.S. as other routes from its family. Historically, it once connected to U.S. 21 in Pineville, North Carolina, but various changes have left it terminating a few miles short of the current U.S. 21.
Starting at the city of Georgetown, US 521 runs through the town Andrews to Greeleyville. From here to the city of Manning it is known as the Greeleyville Highway. There is a brief section right before Manning where it runs concurrent with SC 261. In Manning SC 261 branches off and US 521 merges with US 301 for a short distance. It crosses of I-95 and heads to the city of Sumter. In Sumter, it runs together with US Business 378. Leaving Sumter, US 521 is known as Camden Highway. It passes under I-20 and proceeds to Camden. It then goes on to the town of Kershaw, running concurrent with US 601. The final city it goes through before going into North Carolina is Lancaster.
US 521 traverses 3.8 miles (6.1 km) from the South Carolina state line to Interstate 485. The entire route is a four to six-lane divided highway, split in naming between Lancaster Highway and Johnston Road.
Established in 1932, it was overlapped entirely with SC 26, from Georgetown to the North Carolina state line, where it continued with NC 26 into Pineville, where it ended at U.S. Route 21/NC 261 (now NC 51). In 1933, SC 26 was decommissioned; followed in 1934 with the decommissioning of NC 26.
In 1949, US 521 was rerouted in Williamsburg County to run directly from Andrews, through Salters and Greeleyville, to Manning; which replaced SC 171 and part of SC 261, the old alignment became part of SC 377 and SC 261. Between 1962-64, US 521 was rerouted at the Sumter-Kershaw county line to Camden; the old alignment became an extension of SC 261.
Between 1986-88, US 521 was moved west onto new highway west of Dalzell, bypassing the town; the old alignment was downgraded to secondary roads.
In 1996, US 521 was rerouted onto Interstate 485, between exits 61 and 65; the old alignment was downgraded to secondary roads. In 2003, AASHTO approved US 521 to be truncated at its current northern terminus at the Johnston Road/Interstate 485 interchange; its old alignment north to Interstate 85 was downgraded to secondary roads.
|South Carolina||Georgetown||Georgetown||0.0||0.0||US 17 (Fraser Street) – Charleston, Myrtle Beach||US 521 begins|
US 17 Alt. (Exchange Street) – Pawleys Island, Myrtle Beach
|North end of US 17 Alt. overlap|
US 17 Alt. (Saints Delight Road) – Jamestown, Moncks Corner
|South end of US 17 Alt. overlap|
US 521 Bus. – Andrews
To SC 41 Bus. – Andrews
|||19.5||31.4||SC 41 (County Line Road) – Jamestown, Charleston||South end of SC 41 overlap|
US 521 Bus. / SC 41 (County Line Road) – Hemingway
|North end of SC 41 overlap|
|||38.0||61.2||SC 377 (Martin Luther King Jr. Avenue) – Lane, Kingstree|
|||45.5||73.2||US 52 (Williamsburg County Highway) – Charleston, Kingstree|
|Greeleyville||48.5||78.1||SC 375 south (Gourdin Road) – St. Stephen, Charleston|
|Clarendon||||60.5||97.4||SC 261 east (Kingstree Highway) – Kingstree||East end of SC 261 overlap|
|Manning||63.5||102.2||SC 261 west (Boyce Street)||West end of SC 261 overlap|
|64.0||103.0||US 301 south (Brooks Street)||South end of US 301 overlap|
|||65.5||105.4||US 301 north – Turbeville||North end of US 301 overlap|
|||67.0||107.8||I-95 – Florence, Savannah|
To US 521 Conn. (Guignard Parkway)
|80.5||129.6||US 15 south (Pocalla Road)||South end of US 15 overlap|
|82.3||132.4||US 76 (Liberty Street) / SC 763|
|82.6||132.9||US 15 north (Lafayette Street) / US 401 north (Calhoun Street)||North end of US 15 and US 401 overlap|
US 76 Bus. north (Washington Street) / US 401 north (Calhoun Street)
|East end of US 76 Bus. overlap, south end and terminus of US 401 overlap|
US 15 Conn. south / US 521 Conn. south (Bultman Drive)
US 76 / US 76 Bus. / US 378 – Columbia, Turbeville
|West end of US 76 Bus. overlap|
|Dalzell||93.5||150.5||SC 441 (Peach Orchard Road) – Bishopville, Shaw Air Force Base|
|Kershaw||||107.0||172.2||SC 261 (Boykin Road)|
|Camden||110.0||177.0||I-20 – Columbia, Florence|
|111.0||178.6||US 1 / US 601 / SC 34 (Dekalb Street) – Columbia, Cheraw, Bishopville||South end of US 601 overlap|
|113.0||181.9||SC 97 north (Liberty Hill Road) – Great Falls|
|Lancaster||Kershaw||133.0||214.0||SC 341 south (Marion Street) – Bethune|
|133.3||214.5||US 601 north (Hilton Street) – Pageland||North end of US 601 overlap|
|Heath Springs||139.0||223.7||SC 522 south (Caston Street) – Liberty Hill|
|Pleasant Hill||142.0||228.5||SC 522 north (Rocky River Road)|
US 521 Bus. north (Kershaw Camden Highway)
|149.0||239.8||SC 903 (Flat Creek Road)|
|150.0||241.4||SC 9 (Pageland Highway) – Pageland|
|152.0||244.6||SC 200 (Monroe Road) – Monroe|
US 521 Bus. south (Main Street)
|||159.0||255.9||SC 5 north (Rock Hill Highway) – Rock Hill|
|||161.5||259.9||SC 75 south (Rebound Road)||South end of SC 75 overlap|
|||165.0||265.5||SC 75 north (Waxhaw Highway) – Waxhaw||North end of SC 75 overlap|
|Indian Land||172.0||276.8||SC 160 north (Fort Mill Highway) – Fort Mill|
|South Carolina–North Carolina state line|
|North Carolina||Mecklenburg||Charlotte||1.0||1.6||Lancaster Highway – Pineville|
|3.8||6.1||I-485 – Matthews, Pineville||US 521 ends|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
- Google (January 31, 2011). "US 521" (Map). Google Maps. Google. Retrieved January 31, 2011.
- "US 521 Route Change (2003-09-15)" (PDF). North Carolina Department of Transportation. September 15, 2003. Retrieved January 27, 2013.
- "Mapmikey's South Carolina Highways Page: US 521". Retrieved January 15, 2012.
- "NCRoads.com: U.S. 521". Retrieved January 15, 2012.