US Bridges

Flat Mountain RD over Dickey Brook

Fair

Aroostook County, Maine · 3 MI Swly JCT Route 162 · Structure no. 5029

Built
1921
104 years old, rebuilt 2002
Condition
Fair
inspected October 2024
Type
Tee Beam
Concrete
Length
34 ft
1 main span
Daily traffic
516
2016 count
Owner
State
State Highway Agency

About this bridge

Flat Mountain RD over Dickey Brook is a concrete tee beam carrying Flat Mountain RD over Dickey Brook in Aroostook County, Maine. It was built in 1921 and reconstructed in 2002, so it is 104 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 516 vehicles a day, roughly 5% of them trucks, projected to reach 826 by 2036. The structure is 34 ft (10.4 m) long and 27 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
CarriesFlat Mountain RD
CrossesDickey Brook
Location3 MI Swly JCT Route 162
RouteCounty Highway 0
CountyAroostook County
StateMaine
Coordinates47.21569, -68.36997
Functional classRural Minor 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.5 US tons
Inventory rating48.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length34 ft (10.4 m)
Longest span30 ft (9.1 m)
Deck width27 ft (8.1 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic516 (2016)
Projected traffic826 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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 Flat Mountain RD over Dickey Brook built?

It was built in 1921, making it 104 years old in 2025. It was reconstructed in 2002.

What condition is Flat Mountain RD over Dickey 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 October 2024.

How much traffic does Flat Mountain RD over Dickey Brook carry?

About 516 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Flat Mountain RD over Dickey Brook?

The structure is 34 ft (10.4 m) long with a longest span of 30 ft (9.1 m) and a deck 27 ft wide.

Who owns Flat Mountain RD over Dickey Brook?

It is owned by the State Highway Agency.