US 1 over CONGAREE RIVER (Route: 1)
Num:258x
Open: no restriction [A]
Built: 1927, Reconstructed: N/A [0000]
Historic: Bridge is on the NRHP. [1]

Google Streetview (If Available)

Rough Distance: 0.1 Miles (0.1 Kilometers)

Bridge Type
Main Span(s): Concrete [1] Arch - Deck [11]
Approach Span(s): Other [00]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Integral Concrete (separate non-modified layer of concrete added to structural deck) [2]

Bridge Dimensions
Length: 431.3 m = 1415.1 ft
Main Spans: 11 at 42.7 m = 140.1 ft
Approach Spans: 0
Skew: 0
Width, Roadway: 11 m = 36.1 ft (4 Lanes) and Out-To-Out: 15.9 m = 52.2 ft for a 14.6 m = 47.9 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A

Location
Columbia [16000]: Richland County [079], South Carolina [45]
Owned by State Highway Agency [01], DOT District: 1
CITY OF COLUMBIA

Condition
Deck: Good [7]
Superstructure: Good [7]
Substructure: Good [7]
Loading
Design: M 18 / H 20 [4]
Operating: 24.9 metric ton = 27.4 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])
Inventory: 19.1 metric ton = 21.0 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])

Appraisal
Structural: Meets minimum tolerable limits to be left in place as is [4]
Deck Geometry: Basically intolerable requiring high priority of replacement [2]
Road Alignment: Equal to present desirable criteria [8]
Waterway: Better than present minimum criteria [7] and Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Inspections
Date: February 2020 [0220] and Frequency: 24

Future Work
Work Needed: Widening of existing bridge with deck rehabilitation or replacement. [34]
Bridge Detour: 0.3 km = 0.2 mi
Traffic
ADT: 28000 (2019) and Trucks: 3%
Future ADT: 43960 (In 2039 )

SC 12 over CONGAREE RIVER (Route: 12)
Num:6898x
Open: no restriction [A]
Built: 1976, Reconstructed: N/A [0000]
Historic: Bridge is not eligible for the NRHP. [5]

Google Streetview (If Available)

Rough Distance: 0.3 Miles (0.5 Kilometers)

Bridge Type
Main Span(s): Steel continuous [4] Stringer/Multi-beam or girder [02]
Approach Span(s): Steel [3] Stringer/Multi-beam or girder [02]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Monolithic Concrete (concurrently placed with structural deck) [1]

Bridge Dimensions
Length: 722.4 m = 2370.2 ft
Main Spans: 14 at 42.7 m = 140.1 ft
Approach Spans: 9
Skew: 0
Width, Roadway: 23.2 m = 76.1 ft (6 Lanes) and Out-To-Out: 24.2 m = 79.4 ft for a 23.2 m = 76.1 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A

Location
West Columbia [75850]: Lexington County [063], South Carolina [45]
Owned by State Highway Agency [01], DOT District: 1
1MI W OF COLUMBIA

Condition
Deck: Satisfactory [6]
Superstructure: Fair [5]
Substructure: Good [7]
Loading
Design: MS 18 / HS 20 [5]
Operating: 35 metric ton = 38.5 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])
Inventory: 26.9 metric ton = 29.6 tons (Load and Resistance Factor Rating (LRFR) rating reported by rating factor (RF) method using HL-93 loadings [8])

Appraisal
Structural: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck Geometry: Meets minimum tolerable limits to be left in place as is [4]
Road Alignment: Equal to present desirable criteria [8]
Waterway: Superior to present desirable criteria [9] and Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Inspections
Date: November 1999 [1199] and Frequency: 24

Future Work
Work Needed:
Bridge Detour: 0.3 km = 0.2 mi
Traffic
ADT: 22700 (2019) and Trucks: 10%
Future ADT: 53345 (In 2039 )