US Bridges

N Main ST over Sebasticook River

Poor

Somerset County, Maine · 0.1 MI N of JCT RTE 152 · Structure no. 2475

Built
1985
40 years old
Condition
Poor
inspected March 2024
Type
Culvert
Steel
Length
71 ft
2 main spans
Daily traffic
4,336
2016 count
Owner
State
State Highway Agency

About this bridge

N Main ST over Sebasticook River is a steel culvert carrying N Main ST over Sebasticook River in Somerset County, Maine. It was built in 1985, so it is 40 years old, younger than the Maine average of 53.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 4,336 vehicles a day, roughly 5% of them trucks, projected to reach 6,070 by 2036. The structure is 71 ft (21.5 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesN Main ST
CrossesSebasticook River
Location0.1 MI N of JCT RTE 152
RouteState Highway 11
CountySomerset County
StateMaine
Coordinates44.78575, -69.38102
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.5 US tons
Inventory rating40 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 25 or greater
Structure length71 ft (21.5 m)
Longest span21 ft (6.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,336 (2016)
Projected traffic6,070 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was N Main ST over Sebasticook River built?

It was built in 1985, making it 40 years old in 2025.

What condition is N Main ST over Sebasticook River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2024.

How much traffic does N Main ST over Sebasticook River carry?

About 4,336 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is N Main ST over Sebasticook River?

The structure is 71 ft (21.5 m) long with a longest span of 21 ft (6.3 m).

Who owns N Main ST over Sebasticook River?

It is owned by the State Highway Agency.