Middlesex County, MA

820 public highway bridges

Middlesex County Bridge Snapshot

Middlesex County, Massachusetts contains 820 public highway bridges in the FHWA National Bridge Inventory. Roughly 20.4% are rated “Good,” 61.1% “Fair,” 8.8% “Poor,” and 8.8% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in MA are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

820

Total Bridges

20.4%

Good

8.8%

Poor

8.8%

Structurally Deficient

Condition Distribution

Good

20.4% (167)

Fair

61.1% (501)

Poor

8.8% (72)

SD

8.8% (72)

All Bridges (820)

Sort:

HWY INDSTRIAL AV

Over: WATER RIVER MEADOW BROOK

ADJACENT TO REISSE AVENUE, Middlesex, MA

Built 1959 Load: 42.8 t ADT: 24,000

I 93

Over: OTHER TRI COMMUNITY GREE

0.1 MI S MONTVALE AVE, Middlesex, MA

Built 1958 Load: 42.9 t ADT: 145,900

I 90

Over: OTHER AQDCT AT WLLSLY ST

4 KM W. ST 128&I 95 L38, Middlesex, MA

Built 1957 Load: 43.0 t ADT: 133,087

I 495 NB OFF RAMP

Over: I 495 & RAMP B

.6 MI N OF SOUTHBORO TL, Middlesex, MA

Built 2000 Load: 43.1 t ADT: 3,834

HWY TURNPIKE RD

Over: WATER RIVER MEADOW BROOK

JUST E OF MAIN ST, Middlesex, MA

Built 1984 Load: 43.2 t ADT: 5,043

I 93 SB

Over: RR MBTA/BMRR

0.8 MI NLY RT 125, Middlesex, MA

Built 1959 Load: 43.2 t ADT: 73,300

ST 16 WASHNGTON ST

Over: TR GREEN LINE D

OVER GREEN LINE, Middlesex, MA

Built 1850 Load: 43.3 t ADT: 50,300

ST 2

Over: HWY CENTRAL ST

2.4 MI. E OF I-495, Middlesex, MA

Built 1950 Load: 43.4 t ADT: 37,218

HWY MOODY ST

Over: WATER CHARLES RIVER

.89 MI. N. NEWTON TWN.LN., Middlesex, MA

Built 1917 Load: 43.4 t ADT: 13,500

HWY POLLARD ST

Over: WATER CONCORD RIVER

AT JCT TREBLE COVE RD, Middlesex, MA

Built 1998 Load: 43.5 t ADT: 5,500

HWY PARK AVE

Over: COMB MINUTMN BP & BROOK

91.4 M NO OF MASS AVE, Middlesex, MA

Built 1900 Load: 43.6 t ADT: 18,500

I 93

Over: RR BMRR SPUR (ABAND)

STONEHAM-WOBURN TOWN LINE, Middlesex, MA

Built 1958 Load: 43.7 t ADT: 164,532

HWY GROVE ST

Over: OTHER GREENWAY M/U PATH

.32 KM S RTE 16, Middlesex, MA

Built 1969 Load: 43.9 t ADT: 8,793

HWY LYNN STREET

Over: WATER PINES RIVER

0.05M N OF HADLEY ST, Middlesex, MA

Built 1850 Load: 44.0 t ADT: 5,360

ST 28 MAIN ST

Over: WATER IPSWICH RIVER

READING-NO.READING T.L., Middlesex, MA

Built 1904 Load: 44.0 t ADT: 32,100

I 90 EB

Over: HWY CENTRAL ST

I-90 MM 115.0, Middlesex, MA

Built 1957 Load: 44.3 t ADT: 52,197

I 90 WB

Over: HWY CENTRAL ST

I-90 MM 115.0, Middlesex, MA

Built 1957 Load: 44.3 t ADT: 52,861

ST129 RICHMOND RD

Over: WATER MIDDLESEX CANAL

.32 KM W OF RTE 38, Middlesex, MA

Built 1974 Load: 44.3 t ADT: 23,700

HWY GEO BROWN ST

Over: RR MBTA/BMRR

.16 KM NE SALEM & BROWN, Middlesex, MA

Built 2005 Load: 44.4 t ADT: 1,700

I 290 EB

Over: I 495

2 MILES NORTH OF ROUTE 20, Middlesex, MA

Built 1968 Load: 44.4 t ADT: 30,965

HWY CLIFTON ST

Over: COMB MBTA/BMRR & ORANGE

AT WASHINGTON INTERSECT, Middlesex, MA

Built 1899 Load: 44.5 t ADT: 5,904

I 90 EX 117 IN 13

Over: HWY SPEEN ST

INT 13 TOLL PLAZA, Middlesex, MA

Built 1957 Load: 44.7 t ADT: 52,165

ST111 MASS AVE

Over: WATER FORT POND BROOK

1.5 MI W RT 2 & ST 111, Middlesex, MA

Built 1907 Load: 44.9 t ADT: 7,200

HWY WILDER ST

Over: RR BMRR PAN AM

0.40 KM SE WALKER ST, Middlesex, MA

Built 1850 Load: 44.9 t ADT: 14,200

HWY BROADWAY ST

Over: WATER STONY BROOK

GRANITEVILLE - SECTION, Middlesex, MA

Built 1870 Load: 45.0 t ADT: 800

I 93 NB

Over: WATER IPSWICH RIVER

1.1 MI N OF ST-129, Middlesex, MA

Built 1958 Load: 45.0 t ADT: 69,587

I 93 SB

Over: WATER IPSWICH RIVER

1.1 MI N OF ST-129, Middlesex, MA

Built 1958 Load: 45.0 t ADT: 75,797

HWY BOSTON AVE

Over: WATER MYSTIC RIVER

JUST NW OF RTE 16, Middlesex, MA

Built 1900 Load: 45.1 t ADT: 10,600

HWY 85 CONNECTOR

Over: HWY PLEASANT ST

1 MI E RT 495, Middlesex, MA

Built 1978 Load: 45.2 t ADT: 18,574

HWY HURON AVE

Over: OTHER GREENWAY M/U PATH

2.4 KM S OF JCT SR2, Middlesex, MA

Built 1985 Load: 45.3 t ADT: 13,200

ST 16 WASHNGTON ST

Over: I 95 /ST128

RT 16 AT RT 128, Middlesex, MA

Built 1962 Load: 45.3 t ADT: 67,758

HWY CENTRAL ST

Over: RR MBTA/BMRR

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

Built 1889 Load: 45.3 t ADT: 7,600

I 93

Over: ST 60 WB/SALEM ST

1.1 KM S OF ROSVELT CIR., Middlesex, MA

Built 1961 Load: 45.4 t ADT: 266,500

HWY PROSPECT ST

Over: RR MBTA/BMRR

1.5 MI N OF HARVARD BR., Middlesex, MA

Built 1933 Load: 45.4 t ADT: 14,900

HWY GROVE ST

Over: I 95 /ST128

1 KM S MASS PIKE, Middlesex, MA

Built 1961 Load: 45.5 t ADT: 14,400

HWY LAKE ST

Over: RR MBTA/BMRR

0.3 MI NE OF ST-129, Middlesex, MA

Built 1986 Load: 45.5 t ADT: 4,750

US 3 SB

Over: I 95 /ST128 & CD

RT 3 AT RT 128, Middlesex, MA

Built 1962 Load: 45.7 t ADT: 20,200

ST 2 A/ST110/AYER

Over: RR MBTA/BMRR

1.75 MI NW OF I-495, Middlesex, MA

Built 1975 Load: 45.7 t ADT: 18,750

HWY WASHNGTON ST

Over: RR MBTA/CSX

.1 MI. E. OF ST-27, Middlesex, MA

Built 1895 Load: 45.7 t ADT: 1,300

HWY GLEN AVE

Over: WATER RIVER MEADOW BROOK

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

Built 1959 Load: 45.9 t ADT: 800

HWY UNION AVE

Over: WATER HOP BROOK

.4 MI. N. OF U.S.-20, Middlesex, MA

Built 1900 Load: 46.0 t ADT: 9,379

ST 27 MAIN ST

Over: RR MBTA/BMRR

100 FT S OF SCHOOL ST, Middlesex, MA

Built 1906 Load: 46.3 t ADT: 9,069

I 90 EB

Over: HWY INDIAN ROCK ROAD

I-90 MILE MARKER 119.8, Middlesex, MA

Built 1957 Load: 46.3 t ADT: 67,521

ST 2 A/GREAT RD

Over: WATER MULPUS BROOK

1.1 MI W. AYER TOWN LINE, Middlesex, MA

Built 1941 Load: 46.5 t ADT: 6,891

I 90 RMP D INT 14

Over: OTHER MDC PIPE@NRMBGA RD

SOUTH OF NORUMBEGA RD., Middlesex, MA

Built 1956 Load: 46.5 t ADT: 20,860

HWY HOWARD ST

Over: WATER RIVER MEADOW BROOK

0.25 MI SW CONNCTR & RT3A, Middlesex, MA

Built 1960 Load: 46.6 t ADT: 1,700

I 95 NB/ST128 NB

Over: HWY WINN ST

0.75 MI NE RT 95 & RT 3A, Middlesex, MA

Built 1949 Load: 47.1 t ADT: 799,950

ST 3 A/PRNCETN ST

Over: COMB BMRR & STONY BROOK

1.25 MI N DRUM HILL, Middlesex, MA

Built 1956 Load: 47.3 t ADT: 21,207

ST113 /ST3A/KENDLL

Over: RR BMRR

AT TYNGSBOROUGH BRIDGE, Middlesex, MA

Built 1930 Load: 47.3 t ADT: 22,300

HWY FOUNTAIN ST

Over: RR MBTA/CSX

.1 MI N OF ST-135, Middlesex, MA

Built 1900 Load: 47.5 t ADT: 9,376

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026