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)

ST 28 MCGRATH HWY

Poor

Over: RR MBTA/BMRR

.1 MI S OF PEARL ST, Middlesex, MA

Built 1926 Load: 6.4 t ADT: 32,000

HWY SOUTH RD

Poor

Over: WATER ELM BROOK

.6 MI S OF RT 4 & 225, Middlesex, MA

Built 1970 Load: 6.5 t ADT: 3,400

US 3 /ST2&16/ALWF

Poor

Over: TR RED LINE

.4 MI N OF CONCORD AVE, Middlesex, MA

Built 1983 Load: 11.9 t ADT: 65,948

ST 28 MCGRATH HWY

Poor

Over: COMB SOM AVE EXT & MBTA

.1 MI S OF MEDFORD ST, Middlesex, MA

Built 1958 Load: 12.0 t ADT: 18,436

HWY FIRST ST

Poor

Over: WATER BROAD CANAL

.16 KM N OF LONGFELLOW BR, Middlesex, MA

Built 1924 Load: 12.9 t ADT: 17,844

HWY WINTHROP ST

Poor

Over: WATER MYSTIC RIVER

1.1 KM W OF JCT I93&SR60, Middlesex, MA

Built 1926 Load: 17.2 t ADT: 14,900

HWY WEBSTER AVE

Poor

Over: RR MBTA/BMRR

OVER RAILROAD, Middlesex, MA

Built 1911 Load: 17.6 t ADT: 27,350

HWY LAND BLVD

Poor

Over: WATER BROAD CANAL

.1 MI N OF LONGFELLOW BR, Middlesex, MA

Built 1956 Load: 17.8 t ADT: 15,611

ST 2

Poor

Over: HWY LAKE ST

0.5 MI E RT2 & RT60, Middlesex, MA

Built 1967 Load: 18.5 t ADT: 56,236

HWY BODEN LN

Poor

Over: RR MBTA/CSX

0.1 MI N OF RT 135, Middlesex, MA

Built 1891 Load: 18.5 t ADT: 1,300

US 20 EB/WESTON ST

Poor

Over: I 95 /ST128

RT 20 EB AT RT 128, Middlesex, MA

Built 1960 Load: 19.1 t ADT: 29,250

ST 3 A/GORHAM ST

Poor

Over: WATER RIVER MEADOW BROOK

300 YDS SO LWLL CONNCTR, Middlesex, MA

Built 1960 Load: 21.1 t ADT: 13,600

I 95 ST128

Poor

Over: HWY QUINOBEQUIN RD

0.3 MI SLY RT 16, Middlesex, MA

Built 1950 Load: 22.4 t ADT: 142,579

HWY LINCOLN RD

Poor

Over: WATER SUDBURY RIVER

2 MI E OF CONCORD RD, Middlesex, MA

Built 1992 Load: 22.5 t ADT: 1,551

HWY SUDBURY RD

Poor

Over: WATER ASSABET RIVER

0.8 MI. E. OF RT. 62, Middlesex, MA

Built 1902 Load: 23.1 t ADT: 4,400

ST 3 NB/MEMORL DR

Poor

Over: WATER CHARLES RIVER

JUST S OF LONGFELLOW BR, Middlesex, MA

Built 1956 Load: 23.5 t ADT: 17,000

HWY CORDAVLLE RD

Poor

Over: WATER SUDBURY RIVER

1.3 MI NE OF HOPKINTON, Middlesex, MA

Built 1870 Load: 23.6 t ADT: 8,091

I 93

Poor

Over: I 95 /ST128

RT 93 AT RT 128, Middlesex, MA

Built 1957 Load: 23.7 t ADT: 200,824

ST 2 A/MARRETT RD

Poor

Over: I 95 /ST128

RT 2A AT RT 128, Middlesex, MA

Built 1961 Load: 24.0 t ADT: 23,310

I 495 NB

Poor

Over: WATER ASSABET RIVER

MM 65.4, Middlesex, MA

Built 1963 Load: 24.1 t ADT: 55,989

HWY BRIDGE ST

Poor

Over: WATER EASTERN CANAL

0.4 KM S RTE 110 & 38, Middlesex, MA

Built 1937 Load: 24.8 t ADT: 25,862

ST119 MAIN ST

Poor

Over: WATER PEARL HILL BROOK

2.6 MI W OF ST-13, Middlesex, MA

Built 1907 Load: 24.9 t ADT: 8,358

ST 62 MAIN ST

Poor

Over: WATER ASSABET RIVER

0.25 MI SW RT 27 & MAIN, Middlesex, MA

Built 1922 Load: 25.6 t ADT: 8,000

I 95 SB/ST128 SB

Poor

Over: ST 3 A/CAMBRIDGE ST

AT JUNC. OF I 95 & ST 3A, Middlesex, MA

Built 1950 Load: 25.8 t ADT: 93,600

HWY SUFFOLK ST

Poor

Over: WATER NORTHERN CANAL

FRENCH ST EXT, Middlesex, MA

Built 1848 Load: 26.0 t ADT: 3,000

I 95 SB/ST128 SB

Poor

Over: HWY S BEDFORD ST

0.5 MI SW RT 95 & RT 3A, Middlesex, MA

Built 1950 Load: 26.5 t ADT: 92,706

HWY TRAPELO RD

Poor

Over: I 95 /ST128

1.4 KM SLY RT 2, Middlesex, MA

Built 1960 Load: 26.7 t ADT: 24,727

HWY MISHAWUM RD

Poor

Over: I 95 /ST128

1 MI NE RTE 38, Middlesex, MA

Built 1961 Load: 27.5 t ADT: 13,700

I 495 NB

Poor

Over: ST133 ANDOVER ST

RT 495 AT RT 133, Middlesex, MA

Built 1961 Load: 28.1 t ADT: 60,988

I 495 SB

Poor

Over: ST133 ANDOVER ST

RT 495 AT RT 133, Middlesex, MA

Built 1961 Load: 28.1 t ADT: 60,884

ST 9 BOYLSTON ST

Poor

Over: TR GREEN LINE D

2.3 KM ELY RT 128, Middlesex, MA

Built 1905 Load: 28.3 t ADT: 96,206

HWY FRUIT ST

Poor

Over: COMB MBTA/CSX & SUDBURY

.7 MI EAST OF I - 495, Middlesex, MA

Built 1936 Load: 28.8 t ADT: 4,238

ST117 MAIN ST

Poor

Over: I 95 /ST128

0.5 MI NLY RT 20, Middlesex, MA

Built 1962 Load: 28.8 t ADT: 18,600

HWY NB LOWLL CON

Poor

Over: I 495

1 MI E OF ST-110, Middlesex, MA

Built 1959 Load: 28.9 t ADT: 14,200

HWY SPEEN ST

Poor

Over: RR MBTA/CSX

0.1 MI NORTH OF RT 135, Middlesex, MA

Built 1900 Load: 29.5 t ADT: 13,000

I 495 SB

Poor

Over: ST 38 MAIN ST

RT 495 AT RT 38, Middlesex, MA

Built 1961 Load: 29.7 t ADT: 63,530

ST 2 EB

Poor

Over: HWY PLEASANT ST

2.25 MI SE RT 2 & RT 128, Middlesex, MA

Built 1965 Load: 29.8 t ADT: 86,300

ST126 CONCORD RD

Poor

Over: RR MBTA/BMRR

1 MI N RT 117 & RT 126, Middlesex, MA

Built 1950 Load: 30.0 t ADT: 6,853

ST 2 WB

Poor

Over: HWY PLEASANT ST

2.25 MI SE RT 2 & RT 128, Middlesex, MA

Built 1965 Load: 30.5 t ADT: 76,500

RANGE RD

Poor

Over: PONAKIN BROOK TRIBUTARY

BTW LUNEBURG & SHOEFELT, Middlesex, MA

Built 2011 Load: 30.8 t ADT: 6

ST 38 MAIN ST

Poor

Over: RR MBTA/BMRR

1.1 KM SELY RT 129, Middlesex, MA

Built 1928 Load: 31.0 t ADT: 24,600

HWY PARK AVE

Poor

Over: ST 2

1.6 KM NW RT 60, Middlesex, MA

Built 1967 Load: 31.3 t ADT: 19,500

I 495 SB

Poor

Over: WATER ASSABET RIVER

0.25 MI NW RT 290, Middlesex, MA

Built 1963 Load: 31.3 t ADT: 56,081

I 495 SB

Poor

Over: RR PAN AM

0.25 MI S OF ST-38, Middlesex, MA

Built 1961 Load: 31.4 t ADT: 62,395

I 93 NB OFFRAMP

Poor

Over: ST 38 NB/MYSTIC AVE

3.2 KM N OF JCT I93&US1, Middlesex, MA

Built 1973 Load: 31.6 t ADT: 19,300

I 495 NB

Poor

Over: RR PAN AM

0.25 MI S OF ST-38, Middlesex, MA

Built 1961 Load: 32.2 t ADT: 64,233

I 90 RAMPS A & B

Poor

Over: WATER CHARLES RIVER

AT INT 14 L50, Middlesex, MA

Built 1957 Load: 32.2 t ADT: 80,100

I 495 NB

Poor

Over: ST110 CHELMSFORD ST

RT 495 AT RT 110, Middlesex, MA

Built 1960 Load: 32.5 t ADT: 55,955

HWY SB LOWLL CON

Poor

Over: I 495

1 MI E OF ST-110, Middlesex, MA

Built 1959 Load: 33.3 t ADT: 11,576

HWY LWLL CN B-10

Poor

Over: HWY LOWEL CON RAMP B8

RAMP B-10/RAMP B-8, Middlesex, MA

Built 1959 Load: 33.3 t ADT: 8,500

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

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.