I 93 SB B10-B16 over RR MBTA/BMRR

Map

Coordinates:
+42.38222, -71.07694
42°22'56" N, 71°04'37" W

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

Name:	I 93 SB B10-B16 over RR MBTA/BMRR
Structure number:	B162813EEDOTNBI
Location:	1 MI N OF JCT I93&US1
Purpose:	Carries highway over railroad
Route classification:	Principal Arterial - Interstate (Urban) `[11]`
Length of largest span:	76.1 ft. `[23.2 m]`
Total length:	442.0 ft. `[134.7 m]`
Roadway width between curbs:	44.9 ft. `[13.7 m]`
Deck width edge-to-edge:	57.1 ft. `[17.4 m]`
Vertical clearance above deck:	17.1 ft. `[5.2 m]`
Vertical clearance below bridge:	35.1 ft. `[10.7 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+Mod / HS 20+Mod `[6]`
Number of main spans:	6
Main spans material:	Steel `[3]`
Main spans design:	Girder and floorbeam system `[03]`
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 2015]`
Truck traffic:	9% 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:	Somewhat better than minimum adequacy to tolerate being left in place as is `[5]`
Roadway alignment appraisal:	Better than present minimum criteria `[7]`
Scour condition:	Bridge not over waterway. `[N]`
Operating rating:	55.4 tons `[50.4 metric tons]`
Inventory rating:	33.2 tons `[30.2 metric tons]`
Sufficiency rating:	77.5
Recommended work:	Bridge rehabilitation because of general structure deterioration or inadequate strength. `[35]`
Estimated cost of work:	$13,225,000

Date	Suff. Rating	Condition	Deck	Superstructure	Substructure	SD/FO	ADT
July 2015	77.5	Fair	Satisfactory	Fair	Fair	-	47940
July 2013	75.3	Fair	Satisfactory	Fair	Fair	-	47940
March 2011	72.9	Fair	Satisfactory	Fair	Fair	-	68700
June 2008	72.9	Fair	Satisfactory	Fair	Fair	-	68700

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.

Element	Units	Quantity	1. Good	2. Fair	3. Poor	4. Serious
Superstructure
Steel Girder/Beam	linear ft.	1,798	1,611	142	45	0
Steel Protective Coating	sq. ft.	26,021	23,771	1,160	1,090	0
Steel Stringer	linear ft.	1,771	1,771	0	0	0
Steel Protective Coating	sq. ft.	12,325	12,325	0	0	0
Deck
Reinforced Concrete Deck	sq. ft.	25,921	25,871	50	0	0
Wearing Surfaces	sq. ft.	22,737	22,637	100	0	0
Superstructure
Steel Floor Beam	linear ft.	402	392	0	10	0
Steel Protective Coating	sq. ft.	5,020	4,895	125	0	0
Substructure
Steel Column	each	18	14	0	4	0
Steel Protective Coating	sq. ft.	37,406	37,358	0	48	0
Steel Pier Cap	linear ft.	587	367	135	60	25
Steel Protective Coating	sq. ft.	15,641	9,541	4,327	1,305	468
Joints
Open Joint	linear ft.	150	149	1	0	0
Bridge Rail
Other Material Bridge Rail	linear ft.	883	856	0	27	0