US Bridges

Airline RD over Middle Br Union River

Fair

Hancock County, Maine · 2.3 MI E of Amherst · Structure no. 3087

Built
1982
43 years old
Condition
Fair
inspected October 2024
Type
Culvert
Steel
Length
28 ft
2 main spans
Daily traffic
3,314
2016 count
Owner
State
State Highway Agency

About this bridge

Airline RD over Middle Br Union River is a steel culvert carrying Airline RD over Middle Br Union River in Hancock County, Maine. It was built in 1982, so it is 43 years old, younger 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 3,314 vehicles a day, roughly 5% of them trucks, projected to reach 4,640 by 2036. The structure is 28 ft (8.5 m) long. If it were closed, the detour would be 100 mi (161 km).

Location

Open in Google Maps
CarriesAirline RD
CrossesMiddle Br Union River
Location2.3 MI E of Amherst
RouteState Highway 9
CountyHancock County
StateMaine
Coordinates44.86129, -68.29527
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating106.8 US tons
Inventory rating71.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length28 ft (8.5 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,314 (2016)
Projected traffic4,640 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed100 mi (161 km)
TollOn a free road
National Highway SystemYes

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 Airline RD over Middle Br Union River built?

It was built in 1982, making it 43 years old in 2025.

What condition is Airline RD over Middle Br Union River 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 Airline RD over Middle Br Union River carry?

About 3,314 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Airline RD over Middle Br Union River?

The structure is 28 ft (8.5 m) long with a longest span of 14 ft (4.3 m).

Who owns Airline RD over Middle Br Union River?

It is owned by the State Highway Agency.