US Bridges

US 1 SB over Maine Central RR

Fair

Sagadahoc County, Maine · .2 MI E Townline · Structure no. 6143

Built
1966
59 years old, rebuilt 1992
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
417 ft
6 main spans
Daily traffic
17,833
2016 count
Owner
State
State Highway Agency

About this bridge

US 1 SB over Maine Central RR is a steel continuous stringer/multi-beam or girder carrying US 1 SB over Maine Central RR in Sagadahoc County, Maine. It was built in 1966 and reconstructed in 1992, so it is 59 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 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 17,833 vehicles a day, roughly 5% of them trucks, projected to reach 24,966 by 2036. The structure is 417 ft (127.2 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 1 SB
CrossesMaine Central RR
Location.2 MI E Townline
RouteState Highway 1
CountySagadahoc County
StateMaine
Coordinates43.91647, -69.85721
Functional classRural Principal Arterial - Other

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 inspectionOctober 2024
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 rating46.1 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20 + Mod
Structure length417 ft (127.2 m)
Longest span73 ft (22.3 m)
Deck width35 ft (10.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,833 (2016)
Projected traffic24,966 by 2036
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 1 SB over Maine Central RR built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1992.

What condition is US 1 SB over Maine Central RR 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 October 2024.

How much traffic does US 1 SB over Maine Central RR carry?

About 17,833 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is US 1 SB over Maine Central RR?

The structure is 417 ft (127.2 m) long with a longest span of 73 ft (22.3 m) and a deck 35 ft wide.

Who owns US 1 SB over Maine Central RR?

It is owned by the State Highway Agency.