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 STONY BRK RD

Over: WATER STONY BROOK

.3 MI.N. OF LOWELL RD., Middlesex, MA

Built 1880 Load: 27.5 t ADT: 600

I 90

Over: RR CSX/MBTA

.1 MI S. CHARLES RV S40, Middlesex, MA

Built 1964 Load: 27.6 t ADT: 113,830

ST 2 WB

Over: HWY WALTHAM ST

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

Built 1965 Load: 27.8 t ADT: 47,200

ST 3 NB/MEMORL DR

Over: ST 3 SB TO LONGFLLW BRG

.1 MI S OF LONGFELLOW BR, Middlesex, MA

Built 1957 Load: 27.9 t ADT: 28,450

I 290 WB

Over: I 495

2 MILES NORTH OF ROUTE 20, Middlesex, MA

Built 1968 Load: 28.0 t ADT: 89,528

I 93

Over: HWY WEST ST

0.96 KM NLY RT 128, Middlesex, MA

Built 1959 Load: 28.0 t ADT: 164,350

ST 4 BEDFORD ST

Over: I 95 /ST128

AT EXIT 49 ON ST-128, Middlesex, MA

Built 1961 Load: 28.1 t ADT: 42,543

ST 28 FELLSWAY

Over: RR BMRR (ABANDONED)

AT RAILROAD, Middlesex, MA

Built 1850 Load: 28.2 t ADT: 28,190

I 495 SB

Over: WATER BEAVER BROOK

MM 79.5, Middlesex, MA

Built 1962 Load: 28.3 t ADT: 53,157

ST129 RICHMOND RD

Over: RR MBTA/BMRR

.32 KM W OF RTE 38, Middlesex, MA

Built 1973 Load: 28.3 t ADT: 29,500

I 495 NB

Over: WATER BEAVER BROOK

0.25 MI NE RT 2A, Middlesex, MA

Built 1962 Load: 28.4 t ADT: 60,125

HWY MT AUBURN ST

Over: OTHER GREENWAY M/U PATH

2 MI S OF JCT SR2, Middlesex, MA

Built 1955 Load: 28.5 t ADT: 35,200

HWY RIVER RD

Over: I 95 /ST128

2.3 KM SLY RT 20, Middlesex, MA

Built 1960 Load: 28.6 t ADT: 16,800

ST129 LOWELL ST

Over: RR MBTA/BMRR

0.1 MI ELY WILMINGTON T.L, Middlesex, MA

Built 1958 Load: 28.7 t ADT: 28,448

HWY HOSMER RD

Over: WATER WILLARD BROOK

150 FT SOUTH OF RTE 119, Middlesex, MA

Built 1935 Load: 29.1 t ADT: 200

HWY HOPKINS ST

Over: I 95 /ST128

0.3 MI NELY RT 28, Middlesex, MA

Built 1959 Load: 29.1 t ADT: 5,043

ST 62 MAIN ST

Over: WATER ASSABET RIVER

4.8 KM SW RT 2, Middlesex, MA

Built 1958 Load: 29.2 t ADT: 11,167

HWY MERRIMACK ST

Over: WATER MERRIMACK CANAL

AT DUTTON ST, Middlesex, MA

Built 1823 Load: 29.2 t ADT: 20,520

HWY MERRIMACK ST

Over: WATER WESTERN CANAL

AT SUFFOLK ST, Middlesex, MA

Built 1831 Load: 29.2 t ADT: 17,900

I 93 SB OFF RAMP

Over: I 93 CONNECTORS

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

Built 1973 Load: 29.2 t ADT: 13,300

I 93 NB

Over: HWY VALE ST

0.1 MI SLY ANDOVER T.L., Middlesex, MA

Built 1958 Load: 29.2 t ADT: 137,300

I 93 SB

Over: HWY VALE ST

0.1 MI SLY ANDOVER T.L., Middlesex, MA

Built 1958 Load: 29.2 t ADT: 137,300

I 95 SB/ST128 SB

Over: HWY FOREST PARK RD

1 MI NE RT 128 & RT 3A, Middlesex, MA

Built 1950 Load: 29.2 t ADT: 88,000

ST 99 SB/MAIN ST

Over: RR MBTA/BMRR/CSX

30 M S OF JCT SR16&SR99, Middlesex, MA

Built 1954 Load: 29.3 t ADT: 41,500

HWY SB LOWLL CON

Over: RR CSX (ABANDONED)

274 M E. INDUSTRIAL AVE., Middlesex, MA

Built 1960 Load: 29.7 t ADT: 23,224

I 290 WB

Over: HWY BIGELOW ST

MM31.8, 0.1 MI W OF I-495, Middlesex, MA

Built 1968 Load: 29.7 t ADT: 37,897

ST 16 RAMP

Over: RR MBTA/BMRR

.2 MI E OF SANTILLI CIR, Middlesex, MA

Built 1954 Load: 29.8 t ADT: 21,300

HWY NB LOWLL CON

Over: RR CSX (ABANDONED)

1000' N OF INDUSTRIAL AVE, Middlesex, MA

Built 1960 Load: 29.8 t ADT: 20,716

HWY FR MORIS BLV

Over: WATER WESTERN CANAL

.32 KM S. OF MERRIMACK R, Middlesex, MA

Built 1967 Load: 29.8 t ADT: 18,000

I 495 NB

Over: WATER RIVER MEADOW BROOK

0.7 MI N RTE 110, Middlesex, MA

Built 1959 Load: 30.0 t ADT: 66,190

HWY CONCORD ST

Over: WATER CHARLES RIVER

@ WESTON TL = W29007, Middlesex, MA

Built 1907 Load: 30.0 t ADT: 7,500

ST 28 MAIN ST

Over: WATER MARTINS BROOK

0.2 MI SLY RT 62, Middlesex, MA

Built 1903 Load: 30.0 t ADT: 31,080

ST 9 RAMP E

Over: ST 9 EB

.3 MILES WEST OF I-90, Middlesex, MA

Built 1989 Load: 30.1 t ADT: 2,700

I 95 /ST128

Over: HWY LINCOLN ST

0.5 MI N RT 2 & RT 95, Middlesex, MA

Built 1950 Load: 30.1 t ADT: 196,500

HWY PRESCOTT ST

Over: WATER NISSITISSIT RIVER

.6MI. N. OF BROOKLINE RD., Middlesex, MA

Built 1994 Load: 30.1 t ADT: 800

HWY LAWRENCE ST

Over: WATER CONCORD RIVER

JUST W OF CEMETERY, Middlesex, MA

Built 1850 Load: 30.3 t ADT: 9,600

I 95 /ST128

Over: HWY NORTH AVE

1.4 MI NELY RT 28, Middlesex, MA

Built 1950 Load: 30.4 t ADT: 134,371

I 93 SB

Over: RR MBTA/BMRR

0.4 MI NLY RT 129, Middlesex, MA

Built 1958 Load: 30.4 t ADT: 87,100

HWY RIVER ST

Over: WATER CONCORD RIVER

.8 M SE OF RTE 3, Middlesex, MA

Built 2003 Load: 30.5 t ADT: 12,900

I 95 /ST128

Over: ST 28 MAIN ST

RT 128 AT RT 28, Middlesex, MA

Built 1950 Load: 30.5 t ADT: 16,090

US 20 BSTN POST RD

Over: WATER HOP BROOK

AT CORNER OF STATION RD, Middlesex, MA

Built 1947 Load: 30.5 t ADT: 15,158

HWY BACON ST

Over: WATER ABERJONA RIVER

1.13 KM W OF MEDFORD, Middlesex, MA

Built 1920 Load: 30.5 t ADT: 15,776

HWY BARNUM RD

Over: WATER BOWERS BROOK

0.1MI S OF ST-110 ROTARY, Middlesex, MA

Built 1941 Load: 30.6 t ADT: 4,820

I 90 EB OFF RAMP

Over: OTHER MDC AQUEDUCT

ON MASS PIKE OFF RAMP, Middlesex, MA

Built 1961 Load: 30.7 t ADT: 31,700

HWY CONCORD ST

Over: WATER SUDBURY RIVER

.2 MI NORTH OF FRONT ST, Middlesex, MA

Built 1920 Load: 31.1 t ADT: 1,551

HWY LOWELL RD

Over: WATER CONCORD RIVER

2.0 MI N RTE 2, Middlesex, MA

Built 1964 Load: 31.1 t ADT: 12,000

HWY WINTHROP ST

Over: RR MBTA/BMRR

1.9 KM NW OF JCT I93&SR16, Middlesex, MA

Built 1984 Load: 31.3 t ADT: 20,172

HWY TRULL RD

Over: I 495

0.6 MI N RTE 38, Middlesex, MA

Built 1962 Load: 31.3 t ADT: 1,990

I 95 NB/ST128 NB

Over: ST 38 SB/MAIN ST

RT 128 AT RT 38, Middlesex, MA

Built 1949 Load: 31.3 t ADT: 85,675

I 95 SB/ST128 SB

Over: ST 38 SB/MAIN ST

RT 128 AT RT 38, Middlesex, MA

Built 1949 Load: 31.3 t ADT: 89,701

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.