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 3 A/BOSTON RD

Fair

Over: WATER CONCORD RIVER

1 MI N OF BILLERICA CTR, Middlesex, MA

Built 1920 Load: 56.8 t ADT: 19,655

ST 2 CONCORD TPK

Fair

Over: RR MBTA/BMRR

0.3 KM NW OF ROUTE 62, Middlesex, MA

Built 1988 Load: 57.0 t ADT: 46,900

HWY WATERFLD RD

Fair

Over: WATER ABERJONA RIVER

1.4 KM W MEDFORD, Middlesex, MA

Built 1915 Load: 57.1 t ADT: 9,800

US 3 CD NB

Fair

Over: ST110 CHELMSFORD ST

0.8 KM N OF I 495, Middlesex, MA

Built 2004 Load: 57.3 t ADT: 27,673

HWY SCHOOL ST

Fair

Over: RR MBTA/BMRR

1.3 KM SW OF JCT SR28&38, Middlesex, MA

Built 1898 Load: 57.3 t ADT: 2,100

HWY MONTVALE AVE

Fair

Over: WATER ABERJONA RIVER

0.2 MI W RTE 93, Middlesex, MA

Built 1958 Load: 57.3 t ADT: 39,100

HWY CROSS ST

Fair

Over: RR MBTA/BMRR

1.6 KM S JCT SR28&38, Middlesex, MA

Built 1928 Load: 57.4 t ADT: 8,500

HWY LOWELL ST

Fair

Over: RR BMRR SPUR

1.5 MI SW OF JCT SR28&38, Middlesex, MA

Built 1910 Load: 57.5 t ADT: 6,000

HWY TERR HALL AV

Fair

Over: WATER VINE BROOK

.15MI NE OF MIDDLESEX TPK, Middlesex, MA

Built 1956 Load: 57.6 t ADT: 9,271

HWY OLD BILLERIC

Fair

Over: US 3

1.0 MI NORTH OF ROUTE 62, Middlesex, MA

Built 2004 Load: 57.8 t ADT: 3,900

HWY LOCUST AVE

Fair

Over: US 3

1.1 MI S OF NH LINE, Middlesex, MA

Built 2004 Load: 58.1 t ADT: 3,491

US 3 SB

Fair

Over: ST 40 GROTON RD

RTE 3 AT RTE 40, Middlesex, MA

Built 2004 Load: 58.2 t ADT: 68,922

HWY NASHAWTUC RD

Fair

Over: WATER SUDBURY RIVER

.96 KM N OF RT 2 & 2A, Middlesex, MA

Built 1883 Load: 58.3 t ADT: 1,550

HWY RIVER ST

Fair

Over: WATER BEAVER BROOK

AT INT RIVER & NEWTON STS, Middlesex, MA

Built 1984 Load: 58.3 t ADT: 20,528

HWY CENTRAL ST

Fair

Over: WATER SUDBURY RIVER

JUST E OF EDGELL RD, Middlesex, MA

Built 1969 Load: 58.4 t ADT: 17,300

I 93 NB ON RAMP

Fair

Over: OTHER PEDESTRIAN

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

Built 1973 Load: 58.6 t ADT: 13,200

HWY LOWELL CONN

Fair

Over: WATER RIVER MEADOW BROOK

0.75 MI S PLAIN ST, Middlesex, MA

Built 1960 Load: 58.9 t ADT: 88,000

HWY LANGLEY RD

Fair

Over: TR GREEN LINE D

OVER GREEN LINE, Middlesex, MA

Built 1907 Load: 59.6 t ADT: 3,000

ST 16 MYST VAL PKY

Fair

Over: WATER MYSTIC RIVER

.2 MI E OF WINTHROP ST, Middlesex, MA

Built 1906 Load: 59.9 t ADT: 13,100

HWY CONCORD RD

Fair

Over: US 3

1.6 KM N RTE 4, Middlesex, MA

Built 2004 Load: 60.3 t ADT: 23,405

HWY TREBLE COVE

Fair

Over: US 3

1.2 MI. N. OF CONCORD RD., Middlesex, MA

Built 2004 Load: 60.3 t ADT: 12,400

HWY LWLL CONN SB

Fair

Over: US 3

0.6 MI S OF I 495, Middlesex, MA

Built 2004 Load: 60.4 t ADT: 9,800

HWY CHURCH ST

Fair

Over: OTHER CENTRAL RAIL TRAIL

.32 KM NELY CONANT RD, Middlesex, MA

Built 1911 Load: 60.6 t ADT: 7,758

HWY SCHOOL ST

Fair

Over: WATER MERRIMACK RIVER

S. OF VFW HIGHWAY, Middlesex, MA

Built 1917 Load: 60.9 t ADT: 20,800

US 3 SB

Fair

Over: HWY FARM RD

0.25 MI S TREBLECOVE RD, Middlesex, MA

Built 2004 Load: 61.0 t ADT: 59,224

US 3 NB

Fair

Over: HWY FARM RD

0.25 MI S TREBLECOVE RD, Middlesex, MA

Built 2004 Load: 61.0 t ADT: 53,663

HWY SYCAMORE ST

Fair

Over: RR MBTA/BMRR

1.3 KM W OF JCT SR28&38, Middlesex, MA

Built 1902 Load: 61.1 t ADT: 1,160

US 3 NB

Fair

Over: ST 40 GROTON RD

RTE 3 AT RTE 40, Middlesex, MA

Built 2004 Load: 61.2 t ADT: 51,585

HWY PLAIN ST

Fair

Over: WATER RIVER MEADOW BROOK

0.25 MI E RT 110, Middlesex, MA

Built 1960 Load: 63.6 t ADT: 12,850

HWY HERRICK RD

Fair

Over: TR GREEN LINE D

OVER GREEN LINE, Middlesex, MA

Built 1907 Load: 63.6 t ADT: 4,267

HWY PROSPECT ST

Fair

Over: WATER CHARLES RIVER

.6 MI. S. MAIN ST., Middlesex, MA

Built 1888 Load: 63.6 t ADT: 35,200

I 95 /ST128

Fair

Over: RR BMRR/MBTA

1.2 MI ELY RT 129, Middlesex, MA

Built 1948 Load: 63.7 t ADT: 127,837

HWY KEARNEY SQ

Fair

Over: WATER EASTERN CANAL

MERRIMACK & E.MERRIMACK, Middlesex, MA

Built 1835 Load: 64.8 t ADT: 15,000

HWY RECREATN RD

Fair

Over: ST128 SERVICE RD

0.8 KM SO MASS PIKE, Middlesex, MA

Built 1950 Load: 66.3 t ADT: 1,034

HWY PLEASANT ST

Fair

Over: WATER CHARLES RIVER

.1 MI SOUTH OF ST. 16, Middlesex, MA

Built 1861 Load: 67.5 t ADT: 9,000

HWY CONCORD RD

Fair

Over: OTHER CENTRAL RAIL TRAIL

0.6 KM NWLY BSTON POST RD, Middlesex, MA

Built 1911 Load: 67.7 t ADT: 5,431

HWY MYST VAL PKY

Fair

Over: WATER ALEWIFE BROOK

.4 MI N OF BROADWAY, Middlesex, MA

Built 1908 Load: 67.8 t ADT: 16,200

ST117 GREAT RD

Fair

Over: WATER ASSABET RIVER

0.4 MILES E STOW T. L., Middlesex, MA

Built 1900 Load: 67.8 t ADT: 12,464

ST113 PLEASANT ST

Fair

Over: WATER BEAVER BK WEST STR

.8 KM N RIVERSIDE ST, Middlesex, MA

Built 1855 Load: 68.3 t ADT: 17,123

HWY LAKEVIEW AVE

Fair

Over: WATER BEAVER BROOK

.40 KM E OF MAMMOTH RD, Middlesex, MA

Built 1850 Load: 71.9 t ADT: 9,250

HWY SUMMER ST

Fair

Over: WATER SHAWSHEEN RIVER

2.5 MI E OF SOUTH RD, Middlesex, MA

Built 1959 Load: 72.3 t ADT: 26,897

US 3 NB

Fair

Over: HWY MAIN ST

2 MI. NW DRUM HILL, Middlesex, MA

Built 2004 Load: 76.5 t ADT: 51,000

HWY DRAKE RD

Fair

Over: OTHER MINUTEMAN BIKE PTH

0.4 MI W OF PARK AVE, Middlesex, MA

Built 1995 Load: 77.6 t ADT: 400

ST 3 SB

Fair

Over: HWY LEDGE RD

1.1 MI N OF RTE 40, Middlesex, MA

Built 2004 Load: 77.9 t ADT: 40,287

ST 3 NB

Fair

Over: HWY LEDGE RD

1.1 M. NO. OF RT 40, Middlesex, MA

Built 2004 Load: 77.9 t ADT: 41,426

HWY WALNUT ST

Fair

Over: WATER ASSABET RIVER

.1 MI. S. OF ST-62, Middlesex, MA

Built 1922 Load: 78.2 t ADT: 2,500

HWY COMMRCIAL ST

Fair

Over: WATER LITTLE CREEK

.3 MI SOUTH OF MEDFORD ST, Middlesex, MA

Built 1960 Load: 81.7 t ADT: 24,000

HWY EAST ST

Fair

Over: WATER STRONG WATER BROOK

0.85MI E OF LIVINGSTON ST, Middlesex, MA

Built 2008 Load: 86.3 t ADT: 22,050

HWY LAWRENCE ST

Fair

Over: WATER RIVER MEADOW BROOK

NEAR CONCORD RIVER, Middlesex, MA

Built 1910 Load: 89.0 t ADT: 9,200

ST 38 MAIN ST

Fair

Over: WATER ABERJONA RIVER

.16 KM. E. OF RT. 38, Middlesex, MA

Built 1915 Load: 92.0 t ADT: 10,732

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.