US Bridges

Auburn ST over I-495

Fair

Cumberland County, Maine · 0.420 MI E of Blackstrap · Structure no. 0365

Built
1956
69 years old, rebuilt 1978
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
211 ft
4 main spans
Daily traffic
12,062
2016 count
Owner
Toll Authority
State Toll Authority

About this bridge

Auburn ST over I-495 is a steel continuous stringer/multi-beam or girder carrying Auburn ST over I-495 in Cumberland County, Maine. It was built in 1956 and reconstructed in 1978, so it is 69 years old, older than the Maine average of 53.7 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 12,062 vehicles a day, roughly 5% of them trucks, projected to reach 16,887 by 2036. The structure is 211 ft (64.3 m) long and 40 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesAuburn ST
CrossesI-495
Location0.420 MI E of Blackstrap
RouteState Highway 26
CountyCumberland County
StateMaine
Coordinates43.72511, -70.29441
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.5 US tons
Inventory rating28.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length211 ft (64.3 m)
Longest span59 ft (18.1 m)
Deck width40 ft (12.2 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,062 (2016)
Projected traffic16,887 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Auburn ST over I-495 built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1978.

What condition is Auburn ST over I-495 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 June 2023.

How much traffic does Auburn ST over I-495 carry?

About 12,062 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Auburn ST over I-495?

The structure is 211 ft (64.3 m) long with a longest span of 59 ft (18.1 m) and a deck 40 ft wide.

Who owns Auburn ST over I-495?

It is owned by the State Toll Authority.