I 93 SB B16-SB4 over COMB CAMBRIGE&MBTA/BMRR

Map

Coordinates:
+42.38278, -71.07694
42°22'58" N, 71°04'37" W

Source: National Bridge Inventory
Information not verified. Use at your own risk.

Name:	I 93 SB B16-SB4 over COMB CAMBRIGE&MBTA/BMRR
Structure number:	B162813EGDOTNBI
Location:	1.2 MI N OF JCT I93&US1
Purpose:	Carries highway over highway and railroad
Route classification:	Principal Arterial - Interstate (Urban) `[11]`
Length of largest span:	212.0 ft. `[64.6 m]`
Total length:	1214.0 ft. `[370.0 m]`
Roadway width between curbs:	65.0 ft. `[19.8 m]`
Deck width edge-to-edge:	71.2 ft. `[21.7 m]`
Vertical clearance above deck:	15.1 ft. `[4.6 m]`
Vertical clearance below bridge:	14.8 ft. `[4.5 m]`
Skew angle:	99°
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 / HS 20 `[5]`
Number of main spans:	11
Main spans material:	Steel `[3]`
Main spans design:	Stringer/Multi-beam or girder `[02]`
Deck type:	Concrete Cast-in-Place `[1]`
Wearing surface:	Bituminous `[6]`

Good/Fair/Poor Condition:	Fair
Status:	Open, no restriction `[A]`
Average daily traffic:	47,940 `[as of 2012]`
Truck traffic:	12% of total traffic
Deck condition:	Satisfactory `[6 out of 9]`
Superstructure condition:	Fair `[5 out of 9]`
Substructure condition:	Fair `[5 out of 9]`
Structural appraisal:	Somewhat better than minimum adequacy to tolerate being left in place as is `[5]`
Deck geometry appraisal:	Meets minimum tolerable limits to be left in place as is `[4]`
Underclearances appraisal:	Basically intolerable requiring high priority of corrrective action `[3]`
Roadway alignment appraisal:	Better than present minimum criteria `[7]`
Scour condition:	Bridge not over waterway. `[N]`
Operating rating:	61.2 tons `[55.6 metric tons]`
Inventory rating:	36.6 tons `[33.3 metric tons]`
Sufficiency rating:	73.2
Recommended work:	Bridge rehabilitation because of general structure deterioration or inadequate strength. `[35]`
Estimated cost of work:	$45,323,000

Date	Suff. Rating	Condition	Deck	Superstructure	Substructure	SD/FO	ADT
July 2015	73.2	Fair	Satisfactory	Fair	Fair	FO	47940
July 2013	73.2	Fair	Satisfactory	Fair	Fair	FO	47940
April 2011	69.8	Fair	Satisfactory	Fair	Fair	FO	75900
January 2009	69.8	Fair	Satisfactory	Fair	Fair	FO	75900