IS 470 E over CST BLUE RIDGE BLVD

Map 

Facts 

Name:	IS 470 E over CST BLUE RIDGE BLVD
Structure number:	1827
Old structure number:	A21452 4 (from 1992 edition)
Location:	S 36 T 48 N R 33 W
Purpose:	Carries highway over highway
Route classification:	Principal Arterial - Interstate (Urban) [11]
Length of largest span:	56.1 ft. [17.1 m]
Total length:	192.9 ft. [58.8 m]
Roadway width between curbs:	113.9 ft. [34.7 m]
Deck width edge-to-edge:	116.8 ft. [35.6 m]
Vertical clearance below bridge:	15.4 ft. [4.7 m]
Skew angle:	5°
Owner:	State Highway Agency [01]
Year built:	1976
Historic significance:	Bridge is not eligible for the National Register of Historic Places [5]
Design load:	MS 18 / HS 20 [5]
Number of main spans:	4
Main spans material:	Concrete continuous [2]
Main spans design:	Slab [01]
Deck type:	Concrete Cast-in-Place [1]
Wearing surface:	Low slump Concrete [4]

2010 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	83,847 [as of 2009]
Truck traffic:	11% of total traffic
Deck condition:	Good [7 out of 9]
Superstructure condition:	Good [7 out of 9]
Substructure condition:	Very Good [8 out of 9]
Scour condition:	Bridge not over waterway. [N]
Operating rating:	69.3 tons [63.0 metric tons]
Inventory rating:	41.8 tons [38.0 metric tons]
Evaluation:	Functionally obsolete [2]
Sufficiency rating:	89.9

2000 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	53,860 [as of 1997]
Truck traffic:	10% of total traffic
Deck condition:	Very Good [8 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]
Inventory rating:	41.6 tons [37.8 metric tons]
Evaluation:	Functionally obsolete [2]
Sufficiency rating:	87.7

1992 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	45,425 [as of 1991]
Truck traffic:	10% of total traffic
Deck condition:	Very Good [8 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]
Inventory rating:	35.6 tons [32.4 metric tons]
Evaluation:	Functionally obsolete [2]
Sufficiency rating:	90.4
Recommended work:	Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:	$1,785,000

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