HWY TREMONT ST over COMB I 90 & MBTA/CSX

Map 

Facts 

Name:	HWY TREMONT ST over COMB I 90 & MBTA/CSX
Structure number:	B160434TFDOTNBI
Location:	.2MI.S.BOSTON COMMON S68
Purpose:	Carries highway and pedestrian walkway over highway and railroad
Route classification:	Other Principal Arterial (Urban) [14]
Length of largest span:	58.1 ft. [17.7 m]
Total length:	170.9 ft. [52.1 m]
Roadway width between curbs:	60.0 ft. [18.3 m]
Deck width edge-to-edge:	82.4 ft. [25.1 m]
Vertical clearance below bridge:	14.1 ft. [4.3 m]
Skew angle:	54°
Owner:	State Highway Agency [01]
Year built:	1965
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:	3
Main spans material:	Steel [3]
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:	19,900 [as of 1997]
Truck traffic:	7% of total traffic
Deck condition:	Poor [4 out of 9]
Superstructure condition:	Good [7 out of 9]
Substructure condition:	Fair [5 out of 9]
Scour condition:	Bridge not over waterway. [N]
Operating rating:	47.9 tons [43.5 metric tons]
Inventory rating:	36.0 tons [32.7 metric tons]
Evaluation:	Structurally deficient [1]
Sufficiency rating:	73.5
Recommended work:	Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:	$5,534,000

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