SR 18 over I 20

Map 

Facts 

Name:	SR 18 over I 20
Structure number:	31000180250556B
Location:	SR 18 OVER I 20
Purpose:	Carries highway over highway
Route classification:	Other Principal Arterial (Urban) [14]
Length of largest span:	102.0 ft. [31.1 m]
Total length:	337.9 ft. [103.0 m]
Roadway width between curbs:	40.4 ft. [12.3 m]
Deck width edge-to-edge:	44.0 ft. [13.4 m]
Vertical clearance below bridge:	17.4 ft. [5.3 m]
Skew angle:	10°
Owner:	State Highway Agency [01]
Year built:	1969
Historic significance:	Bridge is not eligible for the National Register of Historic Places [5]
Design load:	MS 18+Mod / HS 20+Mod [6]
Number of main spans:	4
Main spans material:	Concrete continuous [2]
Main spans design:	Box Beam or girders - Single or Spread [06]
Deck type:	Concrete Cast-in-Place [1]
Wearing surface:	Monolithic Concrete (concurrently placed with structural deck) [1]

2010 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	17,500 [as of 2006]
Truck traffic:	3% of total traffic
Deck condition:	Satisfactory [6 out of 9]
Superstructure condition:	Very Good [8 out of 9]
Substructure condition:	Very Good [8 out of 9]
Scour condition:	Bridge not over waterway. [N]
Operating rating:	96.9 tons [88.1 metric tons]
Inventory rating:	58.4 tons [53.1 metric tons]
Sufficiency rating:	92.1

2000 Inspection 

Average daily traffic:	19,500 [as of 1996]
Truck traffic:	8% of total traffic
Evaluation:	Not applicable [N]

1992 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	10,720 [as of 1989]
Truck traffic:	3% of total traffic
Deck condition:	Good [7 out of 9]
Superstructure condition:	Very Good [8 out of 9]
Substructure condition:	Very Good [8 out of 9]
Scour condition:	Bridge not over waterway. [N]
Operating rating:	48.5 tons [44.1 metric tons]
Inventory rating:	35.6 tons [32.4 metric tons]
Sufficiency rating:	93.0

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