US Bridges

Frenchville RD over Alder Brook

Fair

Aroostook County, Maine · 4.1 MI NE of JCT RTE 11 · Structure no. 3702

Built
1958
67 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete
Length
30 ft
1 main span
Daily traffic
630
2016 count
Owner
State
State Highway Agency

About this bridge

Frenchville RD over Alder Brook is a concrete slab carrying Frenchville RD over Alder Brook in Aroostook County, Maine. It was built in 1958, so it is 67 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 630 vehicles a day, roughly 5% of them trucks, projected to reach 1,008 by 2036. The structure is 30 ft (9 m) long and 30 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesFrenchville RD
CrossesAlder Brook
Location4.1 MI NE of JCT RTE 11
RouteState Highway 227
CountyAroostook County
StateMaine
Coordinates46.67024, -68.3512
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.7 US tons
Inventory rating47.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length30 ft (9 m)
Longest span25 ft (7.6 m)
Deck width30 ft (9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic630 (2016)
Projected traffic1,008 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 Frenchville RD over Alder Brook built?

It was built in 1958, making it 67 years old in 2025.

What condition is Frenchville RD over Alder 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 November 2024.

How much traffic does Frenchville RD over Alder Brook carry?

About 630 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Frenchville RD over Alder Brook?

The structure is 30 ft (9 m) long with a longest span of 25 ft (7.6 m) and a deck 30 ft wide.

Who owns Frenchville RD over Alder Brook?

It is owned by the State Highway Agency.