US Bridges

ST 28 S Main ST over ST125 Andover Bypass

Fair

Essex County, Massachusetts · 3.8 MI S Andover Center · Structure no. A090382YPDOTNBI

Built
1958
67 years old, rebuilt 2012
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
182 ft
3 main spans
Daily traffic
17,700
2024 count
Owner
State
State Highway Agency

About this bridge

ST 28 S Main ST over ST125 Andover Bypass is a steel continuous stringer/multi-beam or girder carrying ST 28 S Main ST over ST125 Andover Bypass in Essex County, Massachusetts. It was built in 1958 and reconstructed in 2012, so it is 67 years old, older 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 6 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 17,700 vehicles a day, roughly 2% of them trucks, projected to reach 25,585 by 2031. The structure is 182 ft (55.5 m) long and 93 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesST 28 S Main ST
CrossesST125 Andover Bypass
Location3.8 MI S Andover Center
RouteState Highway 28
Coordinates42.60547, -71.12235
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating90.9 US tons
Inventory rating54.5 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length182 ft (55.5 m)
Longest span85 ft (25.8 m)
Deck width93 ft (28.2 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,700 (2024)
Projected traffic25,585 by 2031
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed5 mi (8 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$3.1 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST 28 S Main ST over ST125 Andover Bypass built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2012.

What condition is ST 28 S Main ST over ST125 Andover Bypass 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 August 2024.

How much traffic does ST 28 S Main ST over ST125 Andover Bypass carry?

About 17,700 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is ST 28 S Main ST over ST125 Andover Bypass?

The structure is 182 ft (55.5 m) long with a longest span of 85 ft (25.8 m) and a deck 93 ft wide.

Who owns ST 28 S Main ST over ST125 Andover Bypass?

It is owned by the State Highway Agency.