US Bridges

N Main ST over Valley Brook

Fair

Franklin County, Maine · 1 MI N JCT 4 · Structure no. 3813

Built
1951
74 years old
Condition
Fair
inspected April 2024
Type
Tee Beam
Concrete
Length
49 ft
1 main span
Daily traffic
1,092
2016 count
Owner
State
State Highway Agency

About this bridge

N Main ST over Valley Brook is a concrete tee beam carrying N Main ST over Valley Brook in Franklin County, Maine. It was built in 1951, so it is 74 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 1,092 vehicles a day, roughly 5% of them trucks, projected to reach 1,638 by 2036. The structure is 49 ft (14.9 m) long and 32 ft wide. If it were closed, the detour would be 26.7 mi (43 km).

Location

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CarriesN Main ST
CrossesValley Brook
Location1 MI N JCT 4
RouteCounty Highway 145
CountyFranklin County
StateMaine
Coordinates44.81779, -70.21801
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating91.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length49 ft (14.9 m)
Longest span45 ft (13.7 m)
Deck width32 ft (9.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,092 (2016)
Projected traffic1,638 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed26.7 mi (43 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 N Main ST over Valley Brook built?

It was built in 1951, making it 74 years old in 2025.

What condition is N Main ST over Valley 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 April 2024.

How much traffic does N Main ST over Valley Brook carry?

About 1,092 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is N Main ST over Valley Brook?

The structure is 49 ft (14.9 m) long with a longest span of 45 ft (13.7 m) and a deck 32 ft wide.

Who owns N Main ST over Valley Brook?

It is owned by the State Highway Agency.