US Bridges

S Main ST over E Branch Sebasticook Riv

Fair

Somerset County, Maine · Adj to W JCT RTE 69 & 220 · Structure no. 3309

Built
1936
89 years old
Condition
Fair
inspected October 2023
Type
Truss - Thru
Steel
Length
94 ft
1 main span
Daily traffic
1,866
2016 count
Owner
State
State Highway Agency

About this bridge

S Main ST over E Branch Sebasticook Riv is a steel truss - thru carrying S Main ST over E Branch Sebasticook Riv in Somerset County, Maine. It was built in 1936, so it is 89 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 1,866 vehicles a day, roughly 5% of them trucks, projected to reach 2,799 by 2036. The structure is 94 ft (28.6 m) long and 23 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesS Main ST
CrossesE Branch Sebasticook Riv
LocationAdj to W JCT RTE 69 & 220
RouteCounty Highway 69
CountySomerset County
StateMaine
Coordinates44.79261, -69.29559
Functional classRural Major Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30.8 US tons
Inventory rating23.9 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length94 ft (28.6 m)
Longest span88 ft (26.8 m)
Deck width23 ft (7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,866 (2016)
Projected traffic2,799 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 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 S Main ST over E Branch Sebasticook Riv built?

It was built in 1936, making it 89 years old in 2025.

What condition is S Main ST over E Branch Sebasticook Riv 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 2023.

How much traffic does S Main ST over E Branch Sebasticook Riv carry?

About 1,866 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is S Main ST over E Branch Sebasticook Riv?

The structure is 94 ft (28.6 m) long with a longest span of 88 ft (26.8 m) and a deck 23 ft wide.

Who owns S Main ST over E Branch Sebasticook Riv?

It is owned by the State Highway Agency.