US Bridges

Main ST over Stillwater River

Fair

Penobscot County, Maine · 2 Miles No Town Line · Structure no. 2278

Built
1949
76 years old, rebuilt 1993
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
455 ft
5 main spans
Daily traffic
15,860
2016 count
Owner
State
State Highway Agency

About this bridge

Main ST over Stillwater River is a steel continuous stringer/multi-beam or girder carrying Main ST over Stillwater River in Penobscot County, Maine. It was built in 1949 and reconstructed in 1993, so it is 76 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 15,860 vehicles a day, roughly 5% of them trucks, projected to reach 22,204 by 2036. The structure is 455 ft (138.6 m) long and 47 ft wide. If it were closed, the detour would be 23 mi (37 km).

Location

Open in Google Maps
CarriesMain ST
CrossesStillwater River
Location2 Miles No Town Line
RouteState Highway 2
CountyPenobscot County
StateMaine
Coordinates44.88554, -68.67086
Functional classUrban Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length455 ft (138.6 m)
Longest span100 ft (30.5 m)
Deck width47 ft (14.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,860 (2016)
Projected traffic22,204 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed23 mi (37 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 Main ST over Stillwater River built?

It was built in 1949, making it 76 years old in 2025. It was reconstructed in 1993.

What condition is Main ST over Stillwater 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 December 2024.

How much traffic does Main ST over Stillwater River carry?

About 15,860 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Main ST over Stillwater River?

The structure is 455 ft (138.6 m) long with a longest span of 100 ft (30.5 m) and a deck 47 ft wide.

Who owns Main ST over Stillwater River?

It is owned by the State Highway Agency.