US Bridges

Main ST over South Br Penobscot River

Fair

Somerset County, Maine · 5.0 MI N of Dennistown · Structure no. 2372

Built
1993
32 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
57 ft
1 main span
Daily traffic
1,480
2016 count
Owner
State
State Highway Agency

About this bridge

Main ST over South Br Penobscot River is a steel stringer/multi-beam or girder carrying Main ST over South Br Penobscot River in Somerset County, Maine. It was built in 1993, so it is 32 years old, younger 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 1,480 vehicles a day, roughly 5% of them trucks, projected to reach 2,220 by 2036. The structure is 57 ft (17.4 m) long and 44 ft wide. If it were closed, the detour would be 100 mi (161 km).

CarriesMain ST
CrossesSouth Br Penobscot River
Location5.0 MI N of Dennistown
RouteState Highway 201
StateMaine
Coordinates45.78152, -70.35431
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.6 US tons
Inventory rating52.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length57 ft (17.4 m)
Longest span55 ft (16.8 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,480 (2016)
Projected traffic2,220 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed100 mi (161 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Main ST over South Br Penobscot River built?

It was built in 1993, making it 32 years old in 2025.

What condition is Main ST over South Br Penobscot River 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 2024.

How much traffic does Main ST over South Br Penobscot River carry?

About 1,480 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Main ST over South Br Penobscot River?

The structure is 57 ft (17.4 m) long with a longest span of 55 ft (16.8 m) and a deck 44 ft wide.

Who owns Main ST over South Br Penobscot River?

It is owned by the State Highway Agency.