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:

ST 31 STATE RD

Over: WATER WILLARD BROOK

AT ST 119 INTERSECTION, Middlesex, MA

Built 1908 Load: 95.3 t ADT: 4,671

ST113 PLEASANT ST

Over: WATER BEAVER BK EAST STR

.8 KM N RIVERSIDE ST, Middlesex, MA

Built 1855 Load: 95.8 t ADT: 17,123

HWY BROOK ST

Over: WATER NASHOBA BROOK

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

Built 1938 Load: 99.2 t ADT: 7,200

HWY RIVER ST

Over: WATER FORT POND BROOK

@ CORNER OF CARRIAGE ST, Middlesex, MA

Built 1937 Load: 99.9 t ADT: 800

ST 27 MAIN ST

Over: WATER FORT POND BROOK

1 MI. S. OF SCHOOL ST, Middlesex, MA

Built 1900 Load: 99.9 t ADT: 9,069

HWY RIVER ST

Over: WATER FORT POND BROOK

.6 MI. E. OF ST. 27, Middlesex, MA

Built 1981 Load: 99.9 t ADT: 3,500

HWY RIVER ST

Over: WATER MYSTIC RIVER

TOWN LINE MED ARL, Middlesex, MA

Built 1938 Load: 99.9 t ADT: 5,302

ST 60 MEDFORD ST

Over: WATER MYSTIC RIVER

TOWN LINE MED ARL, Middlesex, MA

Built 1936 Load: 99.9 t ADT: 24,310

HWY MDDLSEX TPK

Over: WATER SHAWSHEEN RIVER

.7 M SE OF BILLERICA, Middlesex, MA

Built 1975 Load: 99.9 t ADT: 18,000

ST129 SALEM RD

Over: WATER SHAWSHEEN RIVER

0.75 MI E SALEM & BALDWIN, Middlesex, MA

Built 1932 Load: 99.9 t ADT: 10,600

US 3

Over: WATER RIVER MEADOW BRK

0.25 MI S RT 3 & RT 110, Middlesex, MA

Built 1959 Load: 99.9 t ADT: 126,338

US 3

Over: WATER STONY BROOK

1 MI NW DRUM HILL, Middlesex, MA

Built 1959 Load: 99.9 t ADT: 100,800

HWY ELM ST

Over: WATER SUDBURY RIVER

1.2 KM NE RT 2 & RT 62, Middlesex, MA

Built 1874 Load: 99.9 t ADT: 13,100

ST 62 MAIN ST

Over: WATER POWER CANAL

2.4 KM SW RT 2, Middlesex, MA

Built 1885 Load: 99.9 t ADT: 14,400

HWY MONUMENT ST

Over: WATER CONCORD RIVER

2.9 KM N OF RT 2, Middlesex, MA

Built 1877 Load: 99.9 t ADT: 6,607

I 90

Over: WATER SUDBURY RIVER

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

Built 1957 Load: 99.9 t ADT: 102,416

ST110 CHURCH

Over: WATER CONCORD RIVER

0.25 MI W RT 38, Middlesex, MA

Built 1858 Load: 99.9 t ADT: 13,000

HWY MILL ST

Over: WATER ASSABET RIVER

0.2 MI. N. OF RT. 62, Middlesex, MA

Built 1937 Load: 99.9 t ADT: 1,040

ST117 GREAT RD

Over: WATER MILL CANAL

INTER OF WINTER& RT117, Middlesex, MA

Built 1850 Load: 99.9 t ADT: 13,011

ST 9 BOYLSTON ST

Over: WATER CHARLES RIVER

NEWTON-WELLESLEY TWN LINE, Middlesex, MA

Built 1900 Load: 99.9 t ADT: 51,270

ST 9 BOYLSTON ST

Over: WATER HEMLOCK GORGE

AT QUINOBEQUIN RD, Middlesex, MA

Built 1932 Load: 99.9 t ADT: 56,450

I 90

Over: HWY CHARLES ST

.1 MI E.CHARLES RV S10, Middlesex, MA

Built 1964 Load: 99.9 t ADT: 86,719

HWY TOWNSEND RD

Over: WATER MULPUS BROOK

.1 MI N OF ST-2A, Middlesex, MA

Built 1961 Load: 99.9 t ADT: 2,050

HWY BRIDGE ST

Over: WATER SHAWSHEEN RIVER

1 MI NW OF WILMINGTON, Middlesex, MA

Built 1979 Load: 99.9 t ADT: 3,800

HWY CANAL ST

Over: WATER SQUANNACOOK RIVER

.1 MI. N. OF RT. 119, Middlesex, MA

Built 1850 Load: 99.9 t ADT: 4,350

ST119 RIVER RD

Over: WATER WILLARD BROOK

100 FT WEST OF WHEELER RD, Middlesex, MA

Built 1908 Load: 99.9 t ADT: 2,048

ST119 RIVER RD

Over: WATER WILLARD BROOK

0.25 MI E OF ASHBY T.L., Middlesex, MA

Built 1908 Load: 99.9 t ADT: 2,048

ST119 RIVER RD

Over: WATER WILLARD BROOK

AT STATE FOREST HEADQUTRS, Middlesex, MA

Built 1908 Load: 99.9 t ADT: 2,294

HWY NEWTON ST

Over: WATER CHARLES RIVER

0.35 MI SOUTH RTE 20, Middlesex, MA

Built 1877 Load: 99.9 t ADT: 16,601

HWY ASH ST

Over: WATER WESTON RESERVOIR

.9 MI N OF I 90, Middlesex, MA

Built 1902 Load: 99.9 t ADT: 1,810

I 90 RAMPS A & B

Over: OTHER MWRA AQUEDUCT

MTA NO. L-52 & S-8, Middlesex, MA

Built 1957 Load: 99.9 t ADT: 109,700

HWY TAYLOR ST

Over: I 495

0.25 MI S. ST. RTE 2, Middlesex, MA

Built 2015 Load: 1.1 t ADT: 3,000

HWY MAIN ST

Over: WATER SUDBURY RIVER

.1 MI S OF ST-9, Middlesex, MA

Built 1878 Load: 20.2 t ADT: 7,950

HWY MYST VAL PKY

Over: WATER ABERJONA RIVER

ADJACENT TO BMRR, Middlesex, MA

Built 1896 Load: 20.3 t ADT: 6,206

HWY TOWN FARM LN

Over: RR MBTA/BMRR

1 MI S RT 3A & WOBURN ST, Middlesex, MA

Built 1925 Load: 22.7 t ADT: 800

HWY FRANKLIN ST

Over: WATER SUDBURY RIVER

1000 FT N MT WAITE AV, Middlesex, MA

Built 1934 Load: 26.8 t ADT: 4,387

HWY BENNETTS CRS

Over: WATER BENNETTS BROOK

150' SOUTH OF ROUTE 2A, Middlesex, MA

Built 1991 Load: 32.4 t ADT: 200

HWY PINGRY WAY

Over: WATER BENNETTS BRK TRIB

850 FEET E OF BENNETTS CR, Middlesex, MA

Built 1991 Load: 32.4 t ADT: 200

HWY MIDDLESEX TP

Over: WATER VINE BROOK

150' S OF ST-62, Middlesex, MA

Built 1998 Load: 32.4 t ADT: 6,207

ST129 BILLERICA RD

Over: WATER RIVER MEADOW BROOK

1.6 KM W OF RTE 3, Middlesex, MA

Built 2022 Load: 32.4 t ADT: 14,535

HWY SHORE DRIVE

Over: WATER FREEMAN LAKE SPLWY

0.3 MI WEST OF GRACE ST, Middlesex, MA

Built 1975 Load: 32.4 t ADT: 300

HWY CAMBRDGE TPK

Over: WATER MILL BROOK

0.8 MI NW OF ST-2, Middlesex, MA

Built 2020 Load: 32.4 t ADT: 3,900

ST 9 WORCESTER RD

Over: WATER RESERVOIR OUTLET

.5 MI. WEST OF TEMPLE ST, Middlesex, MA

Built 2016 Load: 32.4 t ADT: 41,604

I 90 EB

Over: WATER MDC RES 3

MM 112/E OF EXIT 111/ST9, Middlesex, MA

Built 1957 Load: 32.4 t ADT: 52,197

HWY HILLSIDE DR

Over: WATER DEER BROOK

0.2 MI S OF MARSHALL ST, Middlesex, MA

Built 2000 Load: 32.4 t ADT: 400

HWY OLD SWMLL RD

Over: WATER DEER BROOK

RE, Middlesex, MA

Built 2000 Load: 32.4 t ADT: 400

HWY FRUIT ST

Over: COMB MBTA/CSX & SUDBURY

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

Built 2023 Load: 32.4 t ADT: 2,600

HWY WEDGEWOOD DR

Over: WATER BROOK

150 FT W OF SINGLETARY WY, Middlesex, MA

Built 2000 Load: 32.4 t ADT: 1,800

HWY CENTRAL ST

Over: WATER LWR PAWTUCKET CNL

SOUTH OF MARKET ST, Middlesex, MA

Built 1835 Load: 32.4 t ADT: 12,184

HWY MARKET ST

Over: WATER WESTERN CANAL

AT MICHALOPOULOS SQ, Middlesex, MA

Built 2019 Load: 32.4 t ADT: 6,900

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

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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.