I 93 SB BT 57-61 over RR MBTA & BMRR

Map 

Facts 

Name:	I 93 SB BT 57-61 over RR MBTA & BMRR
Structure number:	B162813BUDOTNBI
Location:	.5 MI N OF JCT 193&US1
Purpose:	Carries highway over railroad
Route classification:	Principal Arterial - Interstate (Urban) [11]
Length of largest span:	83.0 ft. [25.3 m]
Total length:	335.0 ft. [102.1 m]
Roadway width between curbs:	44.3 ft. [13.5 m]
Deck width edge-to-edge:	89.6 ft. [27.3 m]
Vertical clearance above deck:	16.4 ft. [5.0 m]
Vertical clearance below bridge:	19.0 ft. [5.8 m]
Owner:	State Highway Agency [01]
Year built:	1970
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:	Steel [3]
Main spans design:	Girder and floorbeam system [03]
Deck type:	Concrete Cast-in-Place [1]
Wearing surface:	Bituminous [6]

2010 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	68,700 [as of 2005]
Truck traffic:	6% of total traffic
Deck condition:	Satisfactory [6 out of 9]
Superstructure condition:	Satisfactory [6 out of 9]
Substructure condition:	Fair [5 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]
Evaluation:	Functionally obsolete [2]
Sufficiency rating:	55.7
Recommended work:	Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:	$11,698,000

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