Middlesex County, MA

820 public highway bridges

Middlesex County Bridge Snapshot

Middlesex County, Massachusetts contains 820 public highway bridges in the FHWA National Bridge Inventory. Roughly 20.4% are rated “Good,” 61.1% “Fair,” 8.8% “Poor,” and 8.8% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in MA are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

820
Total Bridges
20.4%
Good
8.8%
Poor
8.8%
Structurally Deficient

Condition Distribution

Good
20.4% (167)
Fair
61.1% (501)
Poor
8.8% (72)
SD
8.8% (72)

All Bridges (820)

I 495 NB

Good

Over: HWY WOBURN ST

AT JCT I495 & WOBURN ST., Middlesex, MA

Built 2011 Load: 40.6 t ADT: 64,233

I 290

Good

Over: WATER ASSABET RIVER

MM30.8, E OF SLMN PD RD, Middlesex, MA

Built 1968 Load: 40.7 t ADT: 75,828

HWY LANDHAM RD

Good

Over: WATER HOP BROOK

.3 MI S OF RTE 20, Middlesex, MA

Built 2013 Load: 40.7 t ADT: 17,720

HWY WALDEN ST

Good

Over: RR MBTA/BMRR

2.1 KM S OF JCT SR2A&16, Middlesex, MA

Built 2009 Load: 41.1 t ADT: 9,181

US 3 /ST2&16/ALWF

Good

Over: RR MBTA/BMRR

.1 MI S OF RINGE AVE, Middlesex, MA

Built 1996 Load: 41.8 t ADT: 77,800

I 495 SB

Good

Over: HWY WOBURN ST

AT I495 & WOBURN ST., Middlesex, MA

Built 2011 Load: 41.8 t ADT: 64,355

ST 85 WASHNGTON ST

Good

Over: WATER ASSABET RIVER

0.25 MI SOUTH OF ST 62, Middlesex, MA

Built 2017 Load: 42.1 t ADT: 8,394

HWY MILL ST

Good

Over: WATER NISSITISSIT RIVER

.2 MI NORTH OF ST-113, Middlesex, MA

Built 2012 Load: 42.1 t ADT: 7,500

ST 28 MCGRATH HWY

Good

Over: HWY GILMAN ST

.1 MI S OF EVERETT AVE, Middlesex, MA

Built 2016 Load: 42.1 t ADT: 45,425

HWY LUNDBERG ST

Good

Over: RR MBTA/BMRR

0.25 MI NE RT 3A & LNDBRG, Middlesex, MA

Built 1922 Load: 42.3 t ADT: 2,750

ST 38 MAIN ST

Good

Over: WATER SHAWSHEEN RIVER

.24 KM SELY SHAWSHEEN ST., Middlesex, MA

Built 1997 Load: 42.5 t ADT: 21,500

I 495 SB

Good

Over: RR MBTA/BMRR

50 FT S OF WOBURN ST EXIT, Middlesex, MA

Built 2011 Load: 42.7 t ADT: 64,100

HWY SHAKER RD

Good

Over: WATER CATACUNEMAUG BROOK

@ INT. FREDONIAN ST., Middlesex, MA

Built 2011 Load: 42.7 t ADT: 600

I 495 NB

Good

Over: RR MBTA/BMRR

50 FT S OF WOBURN ST EXIT, Middlesex, MA

Built 2011 Load: 43.3 t ADT: 61,500

ST129 LOWELL ST

Good

Over: WATER MAPLE MEADOW BROOK

0.85 KM E OF JCT ST38, Middlesex, MA

Built 2008 Load: 43.4 t ADT: 28,600

HWY UNION AVE

Good

Over: WATER SUDBURY RIVER

.4 MI S OF MAIN ST, Middlesex, MA

Built 1985 Load: 43.5 t ADT: 14,143

HWY MINERAL ST

Good

Over: RR MBTA/BMRR

0.32 KM NE SUMMER AVE, Middlesex, MA

Built 1997 Load: 43.7 t ADT: 4,100

HWY TAYLOR ST

Good

Over: ST 2

.2 MI WEST OF I-495, Middlesex, MA

Built 2006 Load: 44.2 t ADT: 5,036

I 495 SB

Good

Over: WATER CONCORD RIVER

3.2KM SOUTH OF RT 38, Middlesex, MA

Built 2011 Load: 44.7 t ADT: 64,400

HWY PARKER ST

Good

Over: WATER FORT POND BROOK

CORNER OF CLOVER HILL RD, Middlesex, MA

Built 2018 Load: 45.4 t ADT: 3,000

HWY MEADOWBRK RD

Good

Over: WATER CANAL

.16 KM S OF RT 3, Middlesex, MA

Built 1950 Load: 45.4 t ADT: 1,300

I 495 SB

Good

Over: RR MBTA/BMRR

0.5 MI N OF RT 2, Middlesex, MA

Built 1959 Load: 45.4 t ADT: 43,698

HWY MARION ST

Good

Over: RR MBTA/CSX

0.3 MI N RT 135, Middlesex, MA

Built 1896 Load: 45.4 t ADT: 2,703

ST 9 WORCESTER ST

Good

Over: WATER LAKE COCHITUATE

0.6 MI W OF JCT RTE 9 &27, Middlesex, MA

Built 2007 Load: 45.7 t ADT: 52,165

HWY COCHTUATE ST

Good

Over: OTHER COCHITUATE RAIL TR

0.2 MI.WST.OF ST.27, Middlesex, MA

Built 1896 Load: 45.9 t ADT: 1,300

US 20 BOSTN PST RD

Good

Over: WATER SUDBURY RIVER

.75 MI. W. OF ST-27, Middlesex, MA

Built 2009 Load: 46.5 t ADT: 15,800

ST 2

Good

Over: TR MNUTEMAN BP

JUST W OLD ALEWIFE ROTARY, Middlesex, MA

Built 2004 Load: 47.4 t ADT: 70,300

HWY WHEELER RD

Good

Over: WATER WILLARD BROOK

AT CORNER OF RT.119, Middlesex, MA

Built 2011 Load: 47.4 t ADT: 2,597

HWY HERBERT ST

Good

Over: WATER BEAVER DAM BROOK

AT CORNER OF TRIPP ST., Middlesex, MA

Built 2009 Load: 47.5 t ADT: 8,300

HWY PAGE RD

Good

Over: WATER SHAWSHEEN RIVER

.1MI E OF RT 62, Middlesex, MA

Built 2009 Load: 48.0 t ADT: 9,900

HWY MERIAM ST

Good

Over: RR MBTA/BMRR

JUST OFF MAIN ST, Middlesex, MA

Built 2001 Load: 48.0 t ADT: 1,422

HWY DANFORTH ST

Good

Over: WATER SUDBURY RIVER

.1 MI. E. OF CONCORD ST., Middlesex, MA

Built 1982 Load: 48.6 t ADT: 1,000

HWY BROAD ST

Good

Over: WATER ASSABET RIVER

100 FT S OF WATER ST, Middlesex, MA

Built 2005 Load: 48.6 t ADT: 11,600

I 495 NB/ST 2 CD

Good

Over: ST 2

2 MI.NTH.OF ST.111, Middlesex, MA

Built 2015 Load: 48.6 t ADT: 22,628

HWY DEXTER RD

Good

Over: WATER LAUNDRY BROOK

.96 KM. S. OF I-90, Middlesex, MA

Built 1898 Load: 49.0 t ADT: 1,000

HWY LOWELL ST

Good

Over: RR MBTA/BMRR

1.8 KM NW OF JCT SR28&38, Middlesex, MA

Built 2006 Load: 49.6 t ADT: 6,077

ST 27 /ST62/WALTHM

Good

Over: WATER ASSABET RIVER

0.1 MI E RT 62, Middlesex, MA

Built 2013 Load: 50.3 t ADT: 12,574

I 95 SB/ST128 SB

Good

Over: ST 38 WB/MAIN ST

RT 128 AT RT 38, Middlesex, MA

Built 1949 Load: 50.4 t ADT: 83,200

ST 62 MAIN ST

Good

Over: WATER ASSABET RIVER

.9 MI EAST OF RT 85, Middlesex, MA

Built 2009 Load: 50.5 t ADT: 7,969

US 3 SB

Good

Over: RR BMRR

1.25 MI NW DRUM HILL, Middlesex, MA

Built 2004 Load: 50.8 t ADT: 50,638

ST 9 /ST30/WRCSTR

Good

Over: WATER SUDBURY RIVER

.25 MI W OF PROSPECT ST, Middlesex, MA

Built 2009 Load: 51.0 t ADT: 52,165

US 3 SB

Good

Over: HWY MAIN ST

2 MI. NW DRUM HILL, Middlesex, MA

Built 2004 Load: 51.1 t ADT: 51,000

HWY SCHOOL ST

Good

Over: COMB KYAN ST & BMRR

0.40 KM S SCHOOL & BRDWAY, Middlesex, MA

Built 1995 Load: 51.2 t ADT: 18,491

ST 16 REV BCH PKWY

Good

Over: WATER MALDEN RIVER

.2 MI W OF SANTILLI CIR, Middlesex, MA

Built 2018 Load: 51.8 t ADT: 68,300

HWY CENTRAL ST

Good

Over: WATER SUDBURY RIVER

.1 MI W OF CONCORD ST, Middlesex, MA

Built 1920 Load: 51.8 t ADT: 8,000

I 495 NB

Good

Over: RR MBTA/BMRR

0.5 MI NE RT 2, Middlesex, MA

Built 1959 Load: 51.8 t ADT: 47,280

HWY CANAL STREET

Good

Over: WATER MERRIMACK CANAL

0.8 KM. W. OF RT. 3A, Middlesex, MA

Built 1986 Load: 52.5 t ADT: 1,250

US 3 NB

Good

Over: HWY WESTFORD RD

1.6 MI S OF ST-113, Middlesex, MA

Built 2004 Load: 53.4 t ADT: 50,100

HWY CATACNEMG RD

Good

Over: WATER CATACUNEMAUG BROOK

.8 M. N. OF LEOMINSTER RD, Middlesex, MA

Built 2002 Load: 54.0 t ADT: 520

HWY CHAPIN RD

Good

Over: WATER ASSABET RIVER

.2 MI S OF RIVER ROAD, Middlesex, MA

Built 1997 Load: 54.2 t ADT: 3,600

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial