US Bridges

S Main ST over Piscataquis River

Fair

Piscataquis County, Maine · Adj Tp Sly JCT RTE 150 · Structure no. 2337

Built
1954
71 years old, rebuilt 2016
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
176 ft
2 main spans
Daily traffic
5,955
2016 count
Owner
State
State Highway Agency

About this bridge

S Main ST over Piscataquis River is a steel stringer/multi-beam or girder carrying S Main ST over Piscataquis River in Piscataquis County, Maine. It was built in 1954 and reconstructed in 2016, so it is 71 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 5,955 vehicles a day, roughly 5% of them trucks, projected to reach 8,337 by 2036. The structure is 176 ft (53.5 m) long and 41 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesS Main ST
CrossesPiscataquis River
LocationAdj Tp Sly JCT RTE 150
RouteState Highway 6
CountyPiscataquis County
StateMaine
Coordinates45.16813, -69.38588
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating56.8 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length176 ft (53.5 m)
Longest span84 ft (25.7 m)
Deck width41 ft (12.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,955 (2016)
Projected traffic8,337 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 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 Piscataquis River built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 2016.

What condition is S Main ST over Piscataquis 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 November 2024.

How much traffic does S Main ST over Piscataquis River carry?

About 5,955 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is S Main ST over Piscataquis River?

The structure is 176 ft (53.5 m) long with a longest span of 84 ft (25.7 m) and a deck 41 ft wide.

Who owns S Main ST over Piscataquis River?

It is owned by the State Highway Agency.