US Bridges

Main ST over Great Works Stream

Fair

Penobscot County, Maine · .7 Mi.S. Townline · Structure no. 2328

Built
1969
56 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
100 ft
1 main span
Daily traffic
3,934
2016 count
Owner
State
State Highway Agency

About this bridge

Main ST over Great Works Stream is a steel stringer/multi-beam or girder carrying Main ST over Great Works Stream in Penobscot County, Maine. It was built in 1969, so it is 56 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 3,934 vehicles a day, roughly 5% of them trucks, projected to reach 5,508 by 2036. The structure is 100 ft (30.6 m) long and 53 ft wide. If it were closed, the detour would be 26.1 mi (42 km).

Location

Open in Google Maps
CarriesMain ST
CrossesGreat Works Stream
Location.7 Mi.S. Townline
RouteState Highway 178
CountyPenobscot County
StateMaine
Coordinates44.91465, -68.62972
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to 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 rating75.4 US tons
Inventory rating58.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length100 ft (30.6 m)
Longest span95 ft (29 m)
Deck width53 ft (16.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,934 (2016)
Projected traffic5,508 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed26.1 mi (42 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Main ST over Great Works Stream built?

It was built in 1969, making it 56 years old in 2025.

What condition is Main ST over Great Works Stream 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 August 2023.

How much traffic does Main ST over Great Works Stream carry?

About 3,934 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Main ST over Great Works Stream?

The structure is 100 ft (30.6 m) long with a longest span of 95 ft (29 m) and a deck 53 ft wide.

Who owns Main ST over Great Works Stream?

It is owned by the State Highway Agency.