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)

I 90 EB

Fair

Over: ST 27 N MAIN ST

117.9 MM RT. 90, Middlesex, MA

Built 1957 Load: 33.2 t ADT: 56,977

I 90 WB

Fair

Over: ST 27 N MAIN ST

I-90 MM 117.9, Middlesex, MA

Built 1957 Load: 33.2 t ADT: 84,899

HWY MARBLE ST

Fair

Over: I 93

0.88 KM SLY MONTVALE AVE, Middlesex, MA

Built 1958 Load: 33.2 t ADT: 25,335

I 90 EX 117 IN 13

Fair

Over: ST 30 COCHITUATE RD

OUTSIDE INT 13 L26, Middlesex, MA

Built 1957 Load: 33.4 t ADT: 52,165

US 20 EB

Fair

Over: RR MBTA/BMRR

O, Middlesex, MA

Built 1950 Load: 33.4 t ADT: 22,400

HWY PAWTUCKET ST

Fair

Over: RR BMRR

150 YDS SO OF RIVER, Middlesex, MA

Built 1976 Load: 33.5 t ADT: 20,560

HWY LOWELL CONN

Fair

Over: RR MBTA/BMRR

.8 KM W OF ST-3A, Middlesex, MA

Built 1960 Load: 33.5 t ADT: 55,846

HWY GROVE ST

Fair

Over: RR MBTA/BMRR

1.5 MI W OF JCT SR38&60, Middlesex, MA

Built 1891 Load: 33.5 t ADT: 1,100

I 90 RAMP D

Fair

Over: ST 30 SOUTH AV& I95 RMPS

AT INT 14 L45, Middlesex, MA

Built 1957 Load: 33.5 t ADT: 47,700

HWY SCHOOL ST

Fair

Over: WATER STONY BROOK

1.0 KM SE OF MAIN ST, Middlesex, MA

Built 1850 Load: 33.6 t ADT: 3,750

I 495 SB

Fair

Over: ST110 CHELMSFORD ST

RT 495 AT RT 110, Middlesex, MA

Built 1960 Load: 33.6 t ADT: 54,901

I 495 NB

Fair

Over: HWY RIVER RD

@MM 65.6, Middlesex, MA

Built 1963 Load: 33.6 t ADT: 47,733

I 495 SB

Fair

Over: HWY RIVER RD

@MM 65.6, Middlesex, MA

Built 1963 Load: 33.6 t ADT: 49,054

HWY STEADMAN ST

Fair

Over: US 3

0.75 MI E DRUM HILL, Middlesex, MA

Built 2004 Load: 33.7 t ADT: 8,911

HWY LOWELL CONN

Fair

Over: HWY THORNDIKE ST

.16 KM SE RT 3A & HALE ST, Middlesex, MA

Built 1960 Load: 33.7 t ADT: 35,900

HWY MEDFORD ST

Fair

Over: WATER MALDEN RIVER

.2 M E OF PEARL ST, Middlesex, MA

Built 1976 Load: 33.7 t ADT: 32,100

I 495 SB

Fair

Over: HWY TADMUCK RD

0.5 MI N OF BOSTON RD, Middlesex, MA

Built 1961 Load: 33.7 t ADT: 96,543

HWY GROVE ST

Fair

Over: I 95 /ST128

0.5 MI NE BEDFORD ST, Middlesex, MA

Built 1962 Load: 33.8 t ADT: 4,655

US 20 MAIN ST

Fair

Over: RR BMRR (ABANDONED)

.16 KM WLY WAVERLY ST, Middlesex, MA

Built 1954 Load: 33.9 t ADT: 22,400

I 495 SB

Fair

Over: OTHER BRUCE FREEMAN RAIL

0.5 MILE N. OF RTE 110, Middlesex, MA

Built 1959 Load: 34.0 t ADT: 113,100

HWY WASHNGTON AV

Fair

Over: RR MBTA/CSX

0.4 MI SW OF RT 27, Middlesex, MA

Built 1895 Load: 34.0 t ADT: 4,500

HWY MT VERNON ST

Fair

Over: WATER ABERJONA RIVER

BTW TWN HALL & FIRE STA., Middlesex, MA

Built 1890 Load: 34.0 t ADT: 10,600

I 495 NB

Fair

Over: HWY BERLIN RD

.5 MI. S. OF I-290, Middlesex, MA

Built 1963 Load: 34.1 t ADT: 49,423

I 495 SB

Fair

Over: HWY BERLIN RD

0.5 MI S. I-290, Middlesex, MA

Built 1963 Load: 34.1 t ADT: 47,192

I 495 SB

Fair

Over: HWY GOLDEN COVE RD

0.1 MI E RT 110, Middlesex, MA

Built 1960 Load: 34.2 t ADT: 88,200

HWY MISHAWUM RD

Fair

Over: RR MBTA/BMRR

1.6 KM W RT 93 & RT 128, Middlesex, MA

Built 1977 Load: 34.2 t ADT: 35,560

HWY HARTWELL AVE

Fair

Over: WATER KILN BROOK

1.1 KM SW OF RTE 225, Middlesex, MA

Built 1959 Load: 34.3 t ADT: 18,000

I 93 RP TO I93 NB

Fair

Over: I 93

1.0 KM NW JCT I93&SR28, Middlesex, MA

Built 1972 Load: 34.3 t ADT: 15,869

I 93

Fair

Over: HWY SHORE DR

.8 KM S OF JCT 193&SR16, Middlesex, MA

Built 1973 Load: 34.3 t ADT: 147,366

HWY STOW ST

Fair

Over: WATER FORT POND BROOK

.3MI. W. OF ST-27, Middlesex, MA

Built 1924 Load: 34.4 t ADT: 3,141

HWY POND ST

Fair

Over: RR MBTA/BMRR

1 MI NE SALEM & POND, Middlesex, MA

Built 1986 Load: 34.4 t ADT: 5,400

I 495 NB

Fair

Over: HWY GOLDEN COVE RD

0.1 MI E RT 110, Middlesex, MA

Built 1960 Load: 34.5 t ADT: 66,190

HWY FOREST AVE

Fair

Over: WATER ASSABET RIVER

.2 M SE OF RTE 62, Middlesex, MA

Built 1910 Load: 34.5 t ADT: 3,900

ST 16 MYST VAL PKY

Fair

Over: I 93

1.6 KM S OF JCT SR 60, Middlesex, MA

Built 1961 Load: 34.5 t ADT: 40,000

I 90 RAMPS

Fair

Over: COMB I 95 & CHARLES RIV

AT INT 14 L49, Middlesex, MA

Built 1957 Load: 34.5 t ADT: 56,670

HWY DUTTON ST

Fair

Over: WATER WESTERN CANAL

AT INT. PAWTUCKET CANAL, Middlesex, MA

Built 1986 Load: 34.6 t ADT: 33,940

ST110 /ST38

Fair

Over: WATER MERRIMACK RIVER

AT SAINTS MEMOIAL, Middlesex, MA

Built 1954 Load: 34.6 t ADT: 38,534

HWY FLORENCE ST

Fair

Over: HWY DARTMOUTH ST

1.3 KM S. MELROSE LINE, Middlesex, MA

Built 1975 Load: 34.6 t ADT: 10,700

I 90

Fair

Over: RR CSX

.3 MI. W. OF MDC RES, Middlesex, MA

Built 1957 Load: 34.7 t ADT: 114,872

I 90 EX 117 IN 13

Fair

Over: I 90

AT INTERCHANGE 13, Middlesex, MA

Built 1957 Load: 34.9 t ADT: 45,000

I 93

Fair

Over: HWY CONCORD ST

2.4 KM NLY RT 129, Middlesex, MA

Built 1958 Load: 34.9 t ADT: 155,000

I 495 NB

Fair

Over: ST 38 MAIN ST

RT 495 AT RT 38, Middlesex, MA

Built 1961 Load: 35.0 t ADT: 64,701

HWY LWLL CONN NB

Fair

Over: HWY RIVERNECK RD

0.4 KM W RT 495, Middlesex, MA

Built 1959 Load: 35.2 t ADT: 15,000

HWY HAMMOND ST

Fair

Over: TR GREEN LINE D

0.28 MI NOTH OF RTE 9, Middlesex, MA

Built 1893 Load: 35.2 t ADT: 9,681

I 495 NB

Fair

Over: ST135 WOOD ST

MM 55.3, Middlesex, MA

Built 1966 Load: 35.5 t ADT: 48,152

I 93 NB

Fair

Over: RR MBTA/BMRR

.6 KM NLY RT 129, Middlesex, MA

Built 1958 Load: 35.5 t ADT: 85,100

HWY MAIN ST

Fair

Over: WATER WEDGE POND OTLT

BTN. WEDGEPND & RR, Middlesex, MA

Built 1935 Load: 35.5 t ADT: 14,483

HWY CONCORD RD

Fair

Over: WATER NASHOBA BROOK

.1 MI W OF RTE 2A, Middlesex, MA

Built 1994 Load: 35.6 t ADT: 5,000

HWY TURNPIKE RD

Fair

Over: WATER TRAPFALL BROOK

.4 MI. EST. OF ST-31, Middlesex, MA

Built 1940 Load: 35.6 t ADT: 2,100

ST 2 CONCORD TPK

Fair

Over: RR MBTA/BMRR

2.6 KM SE OF RTE 62, Middlesex, MA

Built 1991 Load: 35.6 t ADT: 46,900

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.