Suffolk County, MA

494 public highway bridges

Suffolk County Bridge Snapshot

Suffolk County, Massachusetts contains 494 public highway bridges in the FHWA National Bridge Inventory. Roughly 22.7% are rated “Good,” 64.4% “Fair,” 6.9% “Poor,” and 6.9% 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.

494
Total Bridges
22.7%
Good
6.9%
Poor
6.9%
Structurally Deficient

Condition Distribution

Good
22.7% (112)
Fair
64.4% (318)
Poor
6.9% (34)
SD
6.9% (34)

All Bridges (494)

I 93 RAMP SACN

Good

Over: COMB US1 RMP LT LC&ORNG

I93/US1 US1 INTERCHANGE, Suffolk, MA

Built 2005 Load: 57.6 t ADT: 21,600

I 93 RAMP SA-CN

Good

Over: HWY ACCESS RD

I93/US1 INTERCHANGE, Suffolk, MA

Built 2003 Load: 58.3 t ADT: 29,700

ST145 REV BCH PKWY

Good

Over: COMB BLUE LN & STATE RD

.1 MI N OF WINTHROP AVE, Suffolk, MA

Built 1933 Load: 58.3 t ADT: 30,300

I 93 RAMP X ACCS

Good

Over: OTHER RELIEF

1 KM E. OF I93, Suffolk, MA

Built 2005 Load: 61.0 t ADT: 17,600

ST145 SARATOGA ST

Good

Over: WATER BELLE ISLE INLET

AT WINTHROP TOWN LINE, Suffolk, MA

Built 2013 Load: 61.8 t ADT: 34,138

HWY WASHNGTON AV

Good

Over: RR MBTA & SILVER LINE

1.6 KM S OF JCT US1&SR16, Suffolk, MA

Built 2018 Load: 64.8 t ADT: 9,310

HWY CUMMINS HWY

Good

Over: RR MBTA

2000FT NW OFJCTSR28&SR138, Suffolk, MA

Built 1901 Load: 65.7 t ADT: 24,439

US 1 RAMP TC

Good

Over: COMB US1NB & MILLERS RI

NORTH OF CANA TUNNEL, Suffolk, MA

Built 1989 Load: 68.2 t ADT: 45,517

HWY REDFIELD ST

Good

Over: COMB MBTA&REDS&FRKLN ST

OVER RED LINE, Suffolk, MA

Built 1955 Load: 90.1 t ADT: 700

ST 9 HUNTINGTN AV

Good

Over: OTHER RELIEF

RING ROAD, Suffolk, MA

Built 1965 Load: 99.9 t ADT: 23,275

HWY STORRW DR WB

Poor

Over: HWY STORROW DR EB

.1 N OF BEACON ST, Suffolk, MA

Built 1951 ADT: 57,770

HWY MERIDIAN ST

Poor

Over: WATER CHELSEA RIVER

@ CHELSEA TL = C09005, Suffolk, MA

Built 1954 Load: 4.3 t ADT: 22,435

HWY CANTERBRY ST

Poor

Over: RR AMTRAK/MBTA

2.3 KM NW OFJCTSR28&SR138, Suffolk, MA

Built 1985 Load: 7.8 t ADT: 16,034

HWY EMBKT WB ON

Poor

Over: HWY EMBANKMENT RD EB

CHARLES CIRCLE STORROW D, Suffolk, MA

Built 1951 Load: 10.7 t ADT: 14,483

US 1 NB/LOW DECK

Poor

Over: HWY CHELSEA LOCAL STRE

CHEL APPR LOW, Suffolk, MA

Built 1950 Load: 10.8 t ADT: 41,951

HWY COMM AV OFRP

Poor

Over: WATER MUDDY RIVER

.2 MI S OF ST RTE 2A, Suffolk, MA

Built 1965 Load: 11.7 t ADT: 7,300

HWY STORRW DR EB

Poor

Over: HWY BOWKR ON & OFF RPS

AT CHARLESGATE, Suffolk, MA

Built 1954 Load: 13.4 t ADT: 32,000

HWY MORRSSEY BLV

Poor

Over: WATER DORCHESTER BAY

.2 MI E OF I 93, Suffolk, MA

Built 1927 Load: 13.6 t ADT: 78,900

HWY BWKR SB ONRP

Poor

Over: HWY KENMORE OFF RMP

.2 MI S OF ST RTE 2A, Suffolk, MA

Built 1965 Load: 14.3 t ADT: 9,900

ST 16 REV BCH PKWY

Poor

Over: ST107 BROADWAY

.32 KM S OF BEACH ST, Suffolk, MA

Built 1931 Load: 14.6 t ADT: 36,500

HWY BWKR SB ONRP

Poor

Over: WATER MUDDY RIVER

.2 MI S OF ST RTE 2A, Suffolk, MA

Built 1965 Load: 18.7 t ADT: 18,470

I 90 EB

Poor

Over: RR MBTA

.1 MI S. CHARLES RV S111, Suffolk, MA

Built 1965 Load: 18.9 t ADT: 76,373

I 90 WB

Poor

Over: RR MBTA

.1 MI S. CHARLES RV S111, Suffolk, MA

Built 1965 Load: 18.9 t ADT: 74,344

HWY CONGRESS ST

Poor

Over: WATER FORT POINT CHANNEL

OVER FT POINT CHANNEL, Suffolk, MA

Built 1850 Load: 21.0 t ADT: 17,100

HWY DORCHSTR AVE

Poor

Over: RR MBTA SPUR

OVER RED LINE, Suffolk, MA

Built 1925 Load: 22.0 t ADT: 11,800

HWY BWKR NB OFRP

Poor

Over: OTHER RELIEF

.2 MI S OF ST RTE 2A, Suffolk, MA

Built 1965 Load: 25.3 t ADT: 8,315

HWY MISHAWUM ST

Poor

Over: ST 99 SULLIVAN SQ UNDRPS

1.6 KM N OF N WSHNGTON ST, Suffolk, MA

Built 1951 Load: 28.5 t ADT: 6,900

HWY BLUE HILL AV

Poor

Over: RR MBTA

1.2 KM N JCTSR28&SR138, Suffolk, MA

Built 1902 Load: 31.5 t ADT: 41,250

HWY CAMBRIDGE ST

Poor

Over: WATER CHARLES RIVER

.64 KM E OF N HARVARD ST, Suffolk, MA

Built 1925 Load: 32.5 t ADT: 33,400

HWY WALWORTH ST

Poor

Over: RR MBTA

JUST N OF BELGRADE AVE, Suffolk, MA

Built 1918 Load: 32.7 t ADT: 10,216

HWY PARK AVE

Poor

Over: US 1 NE XWAY

01.2 KM N OF JCT SR16, Suffolk, MA

Built 1957 Load: 32.8 t ADT: 3,900

I 93 BT SB4-N ABT

Poor

Over: HWY CONNECTORS D & K

1.9 KM N OF JCT. US1&I93, Suffolk, MA

Built 1970 Load: 33.8 t ADT: 73,094

HWY TRMNT-ARLNGT

Poor

Over: RR AMTRAK/MBTA

.16 KM S OF I90, Suffolk, MA

Built 1979 Load: 34.0 t ADT: 30,400

I 90 EB RAMPS OFF

Poor

Over: RR MBTA/CSX

AT COPLEY PLACE S60, Suffolk, MA

Built 1965 Load: 34.5 t ADT: 16,878

ST 28 CHAS R DM RD

Poor

Over: WATER CHARLES RIVER

.2 MI NW OF NASHUA ST, Suffolk, MA

Built 1906 Load: 36.3 t ADT: 61,200

HWY W FOURTH ST

Poor

Over: COMB HAUL RD & CSX

1219 M SW OF D ST OFFICE, Suffolk, MA

Built 1918 Load: 36.6 t ADT: 4,913

HWY BYRON ST

Poor

Over: TR BLUE LINE

OVER BLUE LINE, Suffolk, MA

Built 1950 Load: 38.6 t ADT: 1,200

HWY W ROXBRY PKY

Poor

Over: RR MBTA

.1 MI E OF BEACH ST, Suffolk, MA

Built 1921 Load: 38.8 t ADT: 36,100

HWY COUNTY RD

Poor

Over: US 1 NE XWAY

1.1 KM SW OF JCT SR16, Suffolk, MA

Built 1955 Load: 40.0 t ADT: 14,900

HWY SAVIN HLL AV

Poor

Over: TR RED LINE

0.2M E DORCHESTER AVE, Suffolk, MA

Built 1925 Load: 42.5 t ADT: 6,700

ST 1 A/LEE BRBNK

Poor

Over: ST145 REVERE BCH PKWY

.5 MI SW OF JET SR 60&1A, Suffolk, MA

Built 1934 Load: 45.7 t ADT: 55,630

US 1 SB

Poor

Over: US 1 NB

S APPR TOBIN, Suffolk, MA

Built 1994 Load: 45.9 t ADT: 34,040

HWY RIVER ST

Structurally Deficient

Over: RR AMTRAK/MBTA

.8 KM SW OF MATTAPAN SQ., Suffolk, MA

Built 1883 ADT: 24,000

HWY DORCHSTR AVE

Structurally Deficient

Over: COMB MBTA & RED LN

OVER RED LINE, Suffolk, MA

Built 1924 ADT: 11,800

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

Related

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