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

Map

Coordinates:
+42.38311, -71.07679
42°22'59" N, 71°04'36" 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:	13.1 ft. `[4.0 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:	74,714 `[as of 2015]`
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]`
Sufficiency rating:	70.0
Recommended work:	Bridge rehabilitation because of general structure deterioration or inadequate strength. `[35]`
Estimated cost of work:	$41,701,000

Date	Condition	Deck	Superstructure	Substructure	ADT	Suff. Rating
July 2017	Fair	Satisfactory	Fair	Fair	74714	70.0
July 2015	Fair	Satisfactory	Fair	Fair	47940	73.2
July 2013	Fair	Satisfactory	Fair	Fair	47940	73.2
April 2011	Fair	Satisfactory	Fair	Fair	75900	69.8
January 2009	Fair	Satisfactory	Fair	Fair	75900	69.8

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.

Element	Units	Quantity	1-Good	2-Fair	3-Poor	4-Serious
Superstructure
Steel Girder/Beam	linear ft.	11,448	7,788	3,160	500	0
Steel Protective Coating	sq. ft.	168,604	114,984	46,320	7,300	0
Deck
Reinforced Concrete Deck	sq. ft.	92,304	92,296	0	8	0
Wearing Surfaces	sq. ft.	83,897	83,897	0	0	0
Substructure
Steel Column	each	34	12	18	4	0
Steel Protective Coating	sq. ft.	12,846	3,553	7,293	1,000	1,000
Reinforced Concrete Pier Wall	linear ft.	96	58	20	18	0
Concrete Protective Coating	sq. ft.	2,618	0	0	2,618	0
Steel Pier Cap	linear ft.	1,267	300	567	400	0
Steel Protective Coating	sq. ft.	33,938	5,354	20,584	8,000	0
Reinforced Concrete Pier Cap	linear ft.	139	124	15	0	0
Concrete Protective Coating	sq. ft.	1,939	0	0	1,939	0
Joints
Strip Seal Joint	linear ft.	201	0	201	0	0
Compression Joint	linear ft.	64	26	38	0	0
Open Joint	linear ft.	211	0	211	0	0
Bearings
Movable Bearing	each	8	8	0	0	0
Steel Protective Coating	sq. ft.	64	64	0	0	0
Fixed Bearing	each	24	19	4	1	0
Steel Protective Coating	sq. ft.	96	96	0	0	0
Bridge Rail
Steel or Aluminum Bridge Rail	linear ft.	2,402	2,370	0	32	0