US Bridges

Airline RD over Half Mile Pond Brook

Good

Hancock County, Maine · 3.6 MI E Townline · Structure no. 6246

Built
2021
4 years old
Condition
Good
inspected August 2023
Type
Culvert
Concrete
Length
22 ft
1 main span
Daily traffic
3,850
2016 count
Owner
State
State Highway Agency

About this bridge

Airline RD over Half Mile Pond Brook is a concrete culvert carrying Airline RD over Half Mile Pond Brook in Hancock County, Maine. It was built in 2021, so it is 4 years old, younger than the Maine average of 53.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,850 vehicles a day, roughly 5% of them trucks, projected to reach 5,390 by 2036. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 100 mi (161 km).

CarriesAirline RD
CrossesHalf Mile Pond Brook
Location3.6 MI E Townline
RouteState Highway 9
StateMaine
Coordinates44.82436, -68.40484
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating51 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadGreater than HL 93
Structure length22 ft (6.7 m)
Longest span20 ft (6.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,850 (2016)
Projected traffic5,390 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 Half Mile Pond Brook built?

It was built in 2021, making it 4 years old in 2025.

What condition is Airline RD over Half Mile Pond Brook in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does Airline RD over Half Mile Pond Brook carry?

About 3,850 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Airline RD over Half Mile Pond Brook?

The structure is 22 ft (6.7 m) long with a longest span of 20 ft (6.1 m).

Who owns Airline RD over Half Mile Pond Brook?

It is owned by the State Highway Agency.