US Bridges

S Arm RD over Birch Brook

Fair

Oxford County, Maine · 2 MI N Townline · Structure no. 6132

Built
1968
57 years old
Condition
Fair
inspected October 2024
Type
Slab
Concrete
Length
29 ft
1 main span
Daily traffic
144
2016 count
Owner
State
State Highway Agency

About this bridge

S Arm RD over Birch Brook is a concrete slab carrying S Arm RD over Birch Brook in Oxford County, Maine. It was built in 1968, so it is 57 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 144 vehicles a day, roughly 5% of them trucks, projected to reach 230 by 2036. The structure is 29 ft (8.9 m) long and 29 ft wide.

Location

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CarriesS Arm RD
CrossesBirch Brook
Location2 MI N Townline
RouteCity Street 0
CountyOxford County
StateMaine
Coordinates44.74627, -70.81339
Functional classRural Local

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.2 US tons
Inventory rating52.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length29 ft (8.9 m)
Longest span25 ft (7.6 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic144 (2016)
Projected traffic230 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 S Arm RD over Birch Brook built?

It was built in 1968, making it 57 years old in 2025.

What condition is S Arm RD over Birch 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 S Arm RD over Birch Brook carry?

About 144 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is S Arm RD over Birch Brook?

The structure is 29 ft (8.9 m) long with a longest span of 25 ft (7.6 m) and a deck 29 ft wide.

Who owns S Arm RD over Birch Brook?

It is owned by the State Highway Agency.