SR 520 over UNION BAY

Map 

Facts 

Name:	SR 520 over UNION BAY
Structure number:	0006872E0000000
Location:	0.3 E JCT SR 513
Purpose:	Carries highway over waterway
Route classification:	Other Principal Arterial (Urban) [14]
Length of largest span:	101.1 ft. [30.8 m]
Total length:	1001.0 ft. [305.1 m]
Roadway width between curbs:	21.0 ft. [6.4 m]
Deck width edge-to-edge:	25.6 ft. [7.8 m]
Vertical clearance above deck:	14.8 ft. [4.5 m]
Owner:	State Highway Agency [01]
Year built:	1963
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:	10
Main spans material:	Prestressed concrete [5]
Main spans design:	Stringer/Multi-beam or girder [02]
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:	8,966 [as of 2007]
Truck traffic:	5% of total traffic
Deck condition:	Satisfactory [6 out of 9]
Superstructure condition:	Satisfactory [6 out of 9]
Substructure condition:	Satisfactory [6 out of 9]
Channel protection:	Banks are protected or well vegetated. River control devices such as spur dikes and embankment protection are not required or are in a stable condition. [8]
Pier/abutment protection:	Navigation protection not required [1]
Scour condition:	Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:	62.4 tons [56.7 metric tons]
Inventory rating:	36.6 tons [33.3 metric tons]
Sufficiency rating:	95.2
Estimated cost of work:	$354,000

2000 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	10,435 [as of 1994]
Truck traffic:	5% of total traffic
Deck condition:	Satisfactory [6 out of 9]
Superstructure condition:	Satisfactory [6 out of 9]
Substructure condition:	Satisfactory [6 out of 9]
Channel protection:	Banks are protected or well vegetated. River control devices such as spur dikes and embankment protection are not required or are in a stable condition. [8]
Pier/abutment protection:	Navigation protection not required [1]
Scour condition:	Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:	62.4 tons [56.7 metric tons]
Inventory rating:	36.6 tons [33.3 metric tons]
Sufficiency rating:	90.9
Estimated cost of work:	$356,000

1992 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	6,310 [as of 1976]
Truck traffic:	5% of total traffic
Deck condition:	Satisfactory [6 out of 9]
Superstructure condition:	Good [7 out of 9]
Substructure condition:	Good [7 out of 9]
Channel protection:	Banks are protected or well vegetated. River control devices such as spur dikes and embankment protection are not required or are in a stable condition. [8]
Pier/abutment protection:	Navigation protection not required [1]
Scour condition:	Scour calculation/evaluation has not been made. [6]
Operating rating:	54.5 tons [49.5 metric tons]
Inventory rating:	35.6 tons [32.4 metric tons]
Sufficiency rating:	91.5
Estimated cost of work:	$2,614,000

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