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)

HWY WICKFORD RD

Fair

Over: WATER SUDBURY RIVER

.1 MI N OF I-90, Middlesex, MA

Built 1956 Load: 35.6 t ADT: 5,725

HWY SB LOWLL CON

Fair

Over: HWY INDSTRIAL AVE EAST

0.3 MI N OF I-495, Middlesex, MA

Built 1960 Load: 35.6 t ADT: 35,000

HWY FRONT ST

Fair

Over: WATER SUDBURY RIVER

.1 MI. N. OF ST-135, Middlesex, MA

Built 1880 Load: 35.7 t ADT: 7,170

HWY OLD STOW RD

Fair

Over: RR MBTA/BMRR

0.25 N RTE 62, Middlesex, MA

Built 1930 Load: 35.7 t ADT: 1,700

HWY WINTER ST

Fair

Over: WATER SUDBURY RIVER

.6 MI S OF RTE 9, Middlesex, MA

Built 1870 Load: 35.7 t ADT: 14,300

HWY RSVELT ROT N

Fair

Over: I 93

1.1 KM N OF JCT SR60, Middlesex, MA

Built 1961 Load: 35.9 t ADT: 16,800

ST 28 SB/MCGRATH

Fair

Over: HWY MEDFORD ST

.1 MI W OF ALLSTON ST, Middlesex, MA

Built 1951 Load: 35.9 t ADT: 18,135

I 90 EB

Fair

Over: HWY EDGELL RD

I-90 MM 113.9, Middlesex, MA

Built 1957 Load: 36.0 t ADT: 54,459

I 90 WB

Fair

Over: HWY EDGELL RD

I-90 MM 113.9, Middlesex, MA

Built 1957 Load: 36.0 t ADT: 51,747

HWY HAVERHILL ST

Fair

Over: WATER IPSWICH RIVER

.16 KM. S. OF TOWNCNTR, Middlesex, MA

Built 1958 Load: 36.0 t ADT: 12,900

I 95 /ST128

Fair

Over: ST129 EB LOWELL ST

RT 128 AT RT 129 EB, Middlesex, MA

Built 1949 Load: 36.0 t ADT: 96,021

HWY HRN PD BK RD

Fair

Over: WATER HORN POND BROOK

AT ENT LYNCH JR. H.SCHOOL, Middlesex, MA

Built 1960 Load: 36.0 t ADT: 388

HWY MEADOWBRK RD

Fair

Over: WATER STONY BROOK

02 MI S OF RT 3, Middlesex, MA

Built 2001 Load: 36.1 t ADT: 2,500

ST 9 BOYLSTON ST

Fair

Over: HWY QUINOBEQUIN RD

0.56 KM ELY RT 128, Middlesex, MA

Built 1932 Load: 36.1 t ADT: 79,400

HWY W MAIN ST

Fair

Over: COMB MBTA/BM & ACCS RD

AT CORNER OF SCULLY RD, Middlesex, MA

Built 1996 Load: 36.3 t ADT: 8,118

ST 2

Fair

Over: RR MBTA/BMRR

0.5 MI E RT 495, Middlesex, MA

Built 1950 Load: 36.3 t ADT: 39,000

HWY AIKEN ST

Fair

Over: WATER NORTHERN CANAL

.24 KM SW OF MERRIMACK RV, Middlesex, MA

Built 1897 Load: 36.3 t ADT: 12,055

HWY BEACON ST

Fair

Over: RR MBTA/BMRR

305 M E OF SR2A, Middlesex, MA

Built 1899 Load: 36.3 t ADT: 13,250

I 93

Fair

Over: HWY FALLON ROAD

1.4 KM SLY MONTVALE AVE, Middlesex, MA

Built 1958 Load: 36.4 t ADT: 152,640

I 495 SB

Fair

Over: ST135 WOOD ST

MM 55.3 495 SB, Middlesex, MA

Built 1966 Load: 36.5 t ADT: 53,404

HWY DONALD LYNCH

Fair

Over: WATER ASSABET RIVER

ENTRANCE TO SOL POND MALL, Middlesex, MA

Built 1984 Load: 36.5 t ADT: 30,000

I 90 WB

Fair

Over: HWY RIDGEWAY RD

AT MM 122.6, Middlesex, MA

Built 1957 Load: 36.5 t ADT: 66,710

ST 9 BOYLSTON ST

Fair

Over: HWY CHESTNUT ST

0.64 KM ELY RT 128, Middlesex, MA

Built 1932 Load: 36.6 t ADT: 79,400

HWY GROTON ST

Fair

Over: WATER NASHUA RIVER

.2 MI. N. OF RT. 113, Middlesex, MA

Built 1962 Load: 36.6 t ADT: 2,581

I 90 EB

Fair

Over: ST135 WOOD ST

I-90 MILE MARKER 104.9, Middlesex, MA

Built 1957 Load: 36.7 t ADT: 35,483

I 90 EB

Fair

Over: HWY RIDGEWAY RD

AT ST 30 L42, Middlesex, MA

Built 1957 Load: 36.7 t ADT: 66,710

ST 16 WASHNGTON ST

Fair

Over: WATER CHARLES RIVER

NEWTON WELLESLEY TWN LINE, Middlesex, MA

Built 1929 Load: 36.8 t ADT: 20,800

ST 28 FELLSWAY

Fair

Over: WATER MYSTIC RIVER

.3 MI S OF ST RTE 16, Middlesex, MA

Built 1935 Load: 36.9 t ADT: 64,248

HWY NORTH ST

Fair

Over: RR MBTA/BMRR

1.3 KM SW SR 16 & 38, Middlesex, MA

Built 1997 Load: 36.9 t ADT: 4,400

US 90 RAMP D

Fair

Over: HWY NORUMBEGA RD

AT INT 14 L47, Middlesex, MA

Built 1957 Load: 37.0 t ADT: 61,034

I 90 WB

Fair

Over: ST135 WOOD ST

1-90 MM 104.9, Middlesex, MA

Built 1957 Load: 37.1 t ADT: 35,652

I 495 NB ON RAMP

Fair

Over: I 495 & RAMP D

.5 MI N OF SOUTHBORO T.L., Middlesex, MA

Built 2000 Load: 37.1 t ADT: 4,963

I 495 SB

Fair

Over: ST225 CONCORD RD

@MM 81.7, Middlesex, MA

Built 1959 Load: 37.1 t ADT: 55,662

I 495 NB

Fair

Over: ST225 CONCORD RD

MM 81.7 OF 495 NB, Middlesex, MA

Built 1959 Load: 37.1 t ADT: 53,253

I 93

Fair

Over: HWY MONTVALE AVE

2 MI S RT 128, Middlesex, MA

Built 1958 Load: 37.1 t ADT: 208,231

ST 99 NB/BROADWAY

Fair

Over: RR MBTA/BMRR/CSX

30 M S OF JCT SR16&SR99, Middlesex, MA

Built 1956 Load: 37.2 t ADT: 27,800

ST111 PLEASANT ST

Fair

Over: OTHER DEM RAIL TRAIL

0.3 MI S OF ST-119, Middlesex, MA

Built 2002 Load: 37.2 t ADT: 5,142

ST 16 REV BCH PKWY

Fair

Over: RR MBTA/BMRR

.2 MI E OF SANTILLI CIR, Middlesex, MA

Built 1956 Load: 37.5 t ADT: 52,800

HWY POTTER RD

Fair

Over: WATER SUDBURY RIVER

.35 MI E OF ELM ST, Middlesex, MA

Built 1957 Load: 37.5 t ADT: 5,000

I 93 NB

Fair

Over: RR MBTA/BMRR

0.8 MI N OF ST-125, Middlesex, MA

Built 1959 Load: 37.5 t ADT: 73,300

HWY SB LOWLL CON

Fair

Over: HWY LINCOLN ST

.25 MI W OF PLAIN ST, Middlesex, MA

Built 1960 Load: 37.6 t ADT: 23,700

HWY WINTER ST

Fair

Over: RR MBTA/BMRR

AT OAK GROVE MBTA STATIO, Middlesex, MA

Built 1976 Load: 37.6 t ADT: 5,900

US 20 MAIN ST

Fair

Over: RR MBTA/BMRR

.16 KM E JCT 60 & 20, Middlesex, MA

Built 1936 Load: 37.7 t ADT: 28,190

ST 2 A/FTCHBRG RD

Fair

Over: WATER NASHUA RIVER

AT AYER SHIRLEY TOWN LINE, Middlesex, MA

Built 1975 Load: 37.8 t ADT: 6,959

HWY CABOT ST

Fair

Over: WATER NORTHERN CANAL

N. OF FRENCH ST. EXT., Middlesex, MA

Built 1850 Load: 37.9 t ADT: 8,800

HWY LOVELL RD

Fair

Over: WATER CATACUNEMAUG BROOK

.25 M. EAST OF SPRUCE ST, Middlesex, MA

Built 1941 Load: 38.0 t ADT: 905

I 95 NB RAMP

Fair

Over: OTHER MDC AQUEDUCT

AT INT 14 L51, Middlesex, MA

Built 1957 Load: 38.1 t ADT: 29,482

HWY THORNDIKE ST

Fair

Over: WATER PAWTUCKET CANAL

AT PAWTUCKET & WESTERN CA, Middlesex, MA

Built 1986 Load: 38.2 t ADT: 30,000

HWY BANKS PLACE

Fair

Over: WATER SPOT POND BROOK

.1 MILE WEST OF MAIN ST., Middlesex, MA

Built 1959 Load: 38.2 t ADT: 3,200

HWY W MEADOW RD

Fair

Over: WATER WILLARD BROOK

0.1 MI N OF ST-119, Middlesex, MA

Built 1996 Load: 38.2 t ADT: 500

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

Related

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