US Bridges

Alna RD over Carlton (trout) Brook

Fair

Lincoln County, Maine · 0.4 MI N of JCT Dock Road · Structure no. 2130

Built
1931
94 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Concrete
Length
28 ft
1 main span
Daily traffic
987
2016 count
Owner
State
State Highway Agency

About this bridge

Alna RD over Carlton (trout) Brook is a concrete tee beam carrying Alna RD over Carlton (trout) Brook in Lincoln County, Maine. It was built in 1931, 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 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 987 vehicles a day, roughly 5% of them trucks, projected to reach 1,579 by 2036. The structure is 28 ft (8.5 m) long and 23 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

Location

Open in Google Maps
CarriesAlna RD
CrossesCarlton (trout) Brook
Location0.4 MI N of JCT Dock Road
RouteCounty Highway 218
CountyLincoln County
StateMaine
Coordinates44.10501, -69.61626
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.
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45.7 US tons
Inventory rating35.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length28 ft (8.5 m)
Longest span24 ft (7.3 m)
Deck width23 ft (7 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic987 (2016)
Projected traffic1,579 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.8 mi (56 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 Alna RD over Carlton (trout) Brook built?

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

What condition is Alna RD over Carlton (trout) 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 August 2023.

How much traffic does Alna RD over Carlton (trout) Brook carry?

About 987 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Alna RD over Carlton (trout) Brook?

The structure is 28 ft (8.5 m) long with a longest span of 24 ft (7.3 m) and a deck 23 ft wide.

Who owns Alna RD over Carlton (trout) Brook?

It is owned by the State Highway Agency.