US Bridges

ST 30 South Ave over I 95 /ST128

Fair

Middlesex County, Massachusetts · Rt 30 at Rt 128 · Structure no. W290152K0DOTNBI

Built
1962
63 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
270 ft
4 main spans
Daily traffic
32,600
2023 count
Owner
State
State Highway Agency

About this bridge

ST 30 South Ave over I 95 /ST128 is a steel stringer/multi-beam or girder carrying ST 30 South Ave over I 95 /ST128 in Middlesex County, Massachusetts. It was built in 1962, so it is 63 years old, younger than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 32,600 vehicles a day, roughly 2% of them trucks, projected to reach 70,595 by 2032. The structure is 270 ft (82.3 m) long and 87 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesST 30 South Ave
CrossesI 95 /ST128
LocationRt 30 at Rt 128
RouteU.S. Route 30
CountyMiddlesex County
StateMassachusetts
Coordinates42.34383, -71.26311
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.2 US tons
Inventory rating35.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length270 ft (82.3 m)
Longest span85 ft (25.9 m)
Deck width87 ft (26.5 m)
Roadway width62 ft (18.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,600 (2023)
Projected traffic70,595 by 2032
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$21.4 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST 30 South Ave over I 95 /ST128 built?

It was built in 1962, making it 63 years old in 2025.

What condition is ST 30 South Ave over I 95 /ST128 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2023.

How much traffic does ST 30 South Ave over I 95 /ST128 carry?

About 32,600 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is ST 30 South Ave over I 95 /ST128?

The structure is 270 ft (82.3 m) long with a longest span of 85 ft (25.9 m) and a deck 87 ft wide.

Who owns ST 30 South Ave over I 95 /ST128?

It is owned by the State Highway Agency.