US Bridges

Tremont RD over Marsh Brook

Fair

Hancock County, Maine · 1.5 MI NW JCT RTE 102A · Structure no. 2511

Built
1931
94 years old, rebuilt 2021
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Multiple
Concrete
Length
28 ft
1 main span
Daily traffic
3,767
2016 count
Owner
State
State Highway Agency

About this bridge

Tremont RD over Marsh Brook is a concrete box beam or girders - multiple carrying Tremont RD over Marsh Brook in Hancock County, Maine. It was built in 1931 and reconstructed in 2021, so it is 94 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 3,767 vehicles a day, roughly 5% of them trucks, projected to reach 5,274 by 2036. The structure is 28 ft (8.6 m) long and 33 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesTremont RD
CrossesMarsh Brook
Location1.5 MI NW JCT RTE 102A
RouteState Highway 102
CountyHancock County
StateMaine
Coordinates44.2534, -68.34071
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating67.1 US tons
Inventory rating44.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadGreater than HL 93
Structure length28 ft (8.6 m)
Longest span23 ft (7.1 m)
Deck width33 ft (10.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,767 (2016)
Projected traffic5,274 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Tremont RD over Marsh Brook built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 2021.

What condition is Tremont RD over Marsh Brook 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 September 2024.

How much traffic does Tremont RD over Marsh Brook carry?

About 3,767 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Tremont RD over Marsh Brook?

The structure is 28 ft (8.6 m) long with a longest span of 23 ft (7.1 m) and a deck 33 ft wide.

Who owns Tremont RD over Marsh Brook?

It is owned by the State Highway Agency.