US Bridges

Airport Road over Airport Marsh Outlet

Good

Coos County, New Hampshire · 0.6 MI FR Nh RTE 116 · Structure no. 027401660009600

Built
2009
16 years old
Condition
Good
inspected August 2023
Type
Culvert
Concrete
Length
22 ft
1 main span
Daily traffic
536
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Airport Road over Airport Marsh Outlet is a concrete culvert carrying Airport Road over Airport Marsh Outlet in Coos County, New Hampshire. It was built in 2009, so it is 16 years old, younger than the New Hampshire average of 56.9 years.

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

It carries about 536 vehicles a day, projected to reach 793 by 2043. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesAirport Road
CrossesAirport Marsh Outlet
Location0.6 MI FR Nh RTE 116
CountyCoos County
StateNew Hampshire
Coordinates44.36817, -71.55742
Functional classRural Local

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.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.5 US tons
Inventory rating54 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
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 traffic536 (2023)
Projected traffic793 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$314,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Airport Road over Airport Marsh Outlet built?

It was built in 2009, making it 16 years old in 2025.

What condition is Airport Road over Airport Marsh Outlet 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 Airport Road over Airport Marsh Outlet carry?

About 536 vehicles per day (2023 count).

How long is Airport Road over Airport Marsh Outlet?

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

Who owns Airport Road over Airport Marsh Outlet?

It is owned by the City or Municipal Highway Agency.