Middlesex County, MA

820 public highway bridges

Middlesex County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Middlesex County, Massachusetts contains 820 public highway bridges. Roughly 20.4% are rated “Good,” 61.1% “Fair,” and 8.8% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

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

820

Total Bridges

20.4%

Good

61.1%

Fair

8.8%

Poor Condition

Condition Distribution

Good

20.4% (167)

Fair

61.1% (501)

Poor

8.8% (72)

All Bridges (820)

Sort:

HWY WICKFORD RD

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

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

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

Over: RR MBTA/BMRR

0.25 N RTE 62, Middlesex, MA

Built 1930 Load: 35.7 t ADT: 1,700

HWY WINTER ST

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

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

Over: HWY MEDFORD ST

.1 MI W OF ALLSTON ST, Middlesex, MA

Built 1951 Load: 35.9 t ADT: 18,135

I 90 EB

Over: HWY EDGELL RD

I-90 MM 113.9, Middlesex, MA

Built 1957 Load: 36.0 t ADT: 54,459

I 90 WB

Over: HWY EDGELL RD

I-90 MM 113.9, Middlesex, MA

Built 1957 Load: 36.0 t ADT: 51,747

HWY HAVERHILL ST

Over: WATER IPSWICH RIVER

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

Built 1958 Load: 36.0 t ADT: 12,900

I 95 /ST128

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

Over: WATER HORN POND BROOK

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

Built 1960 Load: 36.0 t ADT: 388

HWY MEADOWBRK RD

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

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

Over: COMB MBTA/BM & ACCS RD

AT CORNER OF SCULLY RD, Middlesex, MA

Built 1996 Load: 36.3 t ADT: 8,118

ST 2

Over: RR MBTA/BMRR

0.5 MI E RT 495, Middlesex, MA

Built 1950 Load: 36.3 t ADT: 39,000

HWY AIKEN ST

Over: WATER NORTHERN CANAL

.24 KM SW OF MERRIMACK RV, Middlesex, MA

Built 1897 Load: 36.3 t ADT: 12,055

HWY BEACON ST

Over: RR MBTA/BMRR

305 M E OF SR2A, Middlesex, MA

Built 1899 Load: 36.3 t ADT: 13,250

I 93

Over: HWY FALLON ROAD

1.4 KM SLY MONTVALE AVE, Middlesex, MA

Built 1958 Load: 36.4 t ADT: 152,640

I 495 SB

Over: ST135 WOOD ST

MM 55.3 495 SB, Middlesex, MA

Built 1966 Load: 36.5 t ADT: 53,404

HWY DONALD LYNCH

Over: WATER ASSABET RIVER

ENTRANCE TO SOL POND MALL, Middlesex, MA

Built 1984 Load: 36.5 t ADT: 30,000

I 90 WB

Over: HWY RIDGEWAY RD

AT MM 122.6, Middlesex, MA

Built 1957 Load: 36.5 t ADT: 66,710

ST 9 BOYLSTON ST

Over: HWY CHESTNUT ST

0.64 KM ELY RT 128, Middlesex, MA

Built 1932 Load: 36.6 t ADT: 79,400

HWY GROTON ST

Over: WATER NASHUA RIVER

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

Built 1962 Load: 36.6 t ADT: 2,581

I 90 EB

Over: ST135 WOOD ST

I-90 MILE MARKER 104.9, Middlesex, MA

Built 1957 Load: 36.7 t ADT: 35,483

I 90 EB

Over: HWY RIDGEWAY RD

AT ST 30 L42, Middlesex, MA

Built 1957 Load: 36.7 t ADT: 66,710

ST 16 WASHNGTON ST

Over: WATER CHARLES RIVER

NEWTON WELLESLEY TWN LINE, Middlesex, MA

Built 1929 Load: 36.8 t ADT: 20,800

ST 28 FELLSWAY

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

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

Over: HWY NORUMBEGA RD

AT INT 14 L47, Middlesex, MA

Built 1957 Load: 37.0 t ADT: 61,034

I 90 WB

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

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

Over: ST225 CONCORD RD

@MM 81.7, Middlesex, MA

Built 1959 Load: 37.1 t ADT: 55,662

I 495 NB

Over: ST225 CONCORD RD

MM 81.7 OF 495 NB, Middlesex, MA

Built 1959 Load: 37.1 t ADT: 53,253

I 93

Over: HWY MONTVALE AVE

2 MI S RT 128, Middlesex, MA

Built 1958 Load: 37.1 t ADT: 208,231

ST 99 NB/BROADWAY

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

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

Over: RR MBTA/BMRR

.2 MI E OF SANTILLI CIR, Middlesex, MA

Built 1956 Load: 37.5 t ADT: 52,800

HWY POTTER RD

Over: WATER SUDBURY RIVER

.35 MI E OF ELM ST, Middlesex, MA

Built 1957 Load: 37.5 t ADT: 5,000

I 93 NB

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

Over: HWY LINCOLN ST

.25 MI W OF PLAIN ST, Middlesex, MA

Built 1960 Load: 37.6 t ADT: 23,700

HWY WINTER ST

Over: RR MBTA/BMRR

AT OAK GROVE MBTA STATIO, Middlesex, MA

Built 1976 Load: 37.6 t ADT: 5,900

US 20 MAIN ST

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

Over: WATER NASHUA RIVER

AT AYER SHIRLEY TOWN LINE, Middlesex, MA

Built 1975 Load: 37.8 t ADT: 6,959

HWY CABOT ST

Over: WATER NORTHERN CANAL

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

Built 1850 Load: 37.9 t ADT: 8,800

HWY LOVELL RD

Over: WATER CATACUNEMAUG BROOK

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

Built 1941 Load: 38.0 t ADT: 905

I 95 NB RAMP

Over: OTHER MDC AQUEDUCT

AT INT 14 L51, Middlesex, MA

Built 1957 Load: 38.1 t ADT: 29,482

HWY THORNDIKE ST

Over: WATER PAWTUCKET CANAL

AT PAWTUCKET & WESTERN CA, Middlesex, MA

Built 1986 Load: 38.2 t ADT: 30,000

HWY BANKS PLACE

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

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.

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

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Compiled by PlainBridges, Independent data publisher

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.