HWY RIVER ST over RR AMTRAK/MBTA

Map

Coordinates:
+42.25567, -71.12526
42°15'20" N, 71°07'31" W

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

Name:	HWY RIVER ST over RR AMTRAK/MBTA
Structure number:	B161093H8DOT634
Location:	.8 KM SW OF MATTAPAN SQ.
Purpose:	Carries highway and pedestrian walkway over railroad
Route classification:	Minor Arterial (Urban) `[16]`
Length of largest span:	76.1 ft. `[23.2 m]`
Total length:	82.0 ft. `[25.0 m]`
Roadway width between curbs:	28.2 ft. `[8.6 m]`
Deck width edge-to-edge:	51.8 ft. `[15.8 m]`
Vertical clearance below bridge:	16.4 ft. `[5.0 m]`
Skew angle:	30°
Owner:	State Highway Agency `[01]`
Year built:	1883
Year reconstructed:	1990
Historic significance:	Bridge is not eligible for the National Register of Historic Places `[5]`
Design load:	M 18 / H 20 `[4]`
Main span material:	Steel `[3]`
Main span design:	Truss - Thru `[10]`
Deck type:	Corrugated Steel `[6]`
Wearing surface:	Bituminous `[6]`

Good/Fair/Poor Condition:	Poor
Status:	Open, no restriction `[A]`
Average daily traffic:	18,200 `[as of 2013]`
Truck traffic:	5% of total traffic
Deck condition:	Fair `[5 out of 9]`
Superstructure condition:	Poor `[4 out of 9]`
Substructure condition:	Satisfactory `[6 out of 9]`
Structural appraisal:	Meets minimum tolerable limits to be left in place as is `[4]`
Deck geometry appraisal:	Basically intolerable requiring high priority of replacement `[2]`
Underclearances appraisal:	Basically intolerable requiring high priority of replacement `[2]`
Roadway alignment appraisal:	Equal to present minimum criteria `[6]`
Scour condition:	Bridge not over waterway. `[N]`
Sufficiency rating:	28.6
Recommended work:	Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. `[31]`
Estimated cost of work:	$4,840,000

Date	Condition	Deck	Superstructure	Substructure	ADT	Suff. Rating
November 2017	Poor	Fair	Poor	Satisfactory	18200	28.6
November 2015	Poor	Fair	Poor	Satisfactory	18200	28.6
November 2013	Poor	Fair	Poor	Satisfactory	18200	28.6
November 2011	Poor	Fair	Poor	Satisfactory	25700	36.6
September 2009	Poor	Fair	Poor	Satisfactory	22200	37.6

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

Element	Units	Quantity	1-Good	2-Fair	3-Poor	4-Serious
Superstructure
Steel Stringer	linear ft.	570	75	238	249	8
Steel Protective Coating	sq. ft.	2,228	2,228	0	0	0
Timber Stringer	linear ft.	738	738	0	0	0
Steel Truss	linear ft.	165	0	0	115	50
Steel Protective Coating	sq. ft.	3,070	3,070	0	0	0
Steel Floor Beam	linear ft.	335	53	159	116	7
Steel Protective Coating	sq. ft.	2,138	2,138	0	0	0
Substructure
Masonry Abutment	linear ft.	120	0	24	96	0
Deck
Corrugated or Orthotropic Deck	sq. ft.	2,275	0	2,275	0	0
Wearing Surfaces	sq. ft.	2,275	0	2,275	0	0
Joints
Strip Seal Joint	linear ft.	37	0	37	0	0
Deck
Timber Deck	sq. ft.	1,500	1,500	0	0	0
Bearings
Elastomeric Bearing	each	6	6	0	0	0
Movable Bearing	each	5	4	1	0	0
Steel Protective Coating	sq. ft.	14	14	0	0	0
Fixed Bearing	each	7	5	2	0	0
Steel Protective Coating	sq. ft.	19	19	0	0	0
Bridge Rail
Steel or Aluminum Bridge Rail	linear ft.	165	148	0	17	0