US Bridges

US302 over Nhrr(conway Scenic Line)

Good

Carroll County, New Hampshire · 2.1 MI SW JCT Nh 16 · Structure no. 001701890012400

Built
2008
17 years old
Condition
Good
inspected March 2024
Type
Culvert
Concrete
Length
86 ft
1 main span
Daily traffic
4,065
2023 count
Owner
State
State Highway Agency

About this bridge

US302 over Nhrr(conway Scenic Line) is a concrete culvert carrying US302 over Nhrr(conway Scenic Line) in Carroll County, New Hampshire. It was built in 2008, so it is 17 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 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 4,065 vehicles a day, roughly 7% of them trucks, projected to reach 6,016 by 2043. The structure is 86 ft (26.2 m) long. If it were closed, the detour would be 47.8 mi (77 km).

Location

Open in Google Maps
CarriesUS302
CrossesNhrr(conway Scenic Line)
Location2.1 MI SW JCT Nh 16
RouteU.S. Route 302
CountyCarroll County
StateNew Hampshire
Coordinates44.09022, -71.20501
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
Culvert8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 25 or greater
Structure length86 ft (26.2 m)
Longest span83 ft (25.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,065 (2023)
Projected traffic6,016 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed47.8 mi (77 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US302 over Nhrr(conway Scenic Line) built?

It was built in 2008, making it 17 years old in 2025.

What condition is US302 over Nhrr(conway Scenic Line) 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 March 2024.

How much traffic does US302 over Nhrr(conway Scenic Line) carry?

About 4,065 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US302 over Nhrr(conway Scenic Line)?

The structure is 86 ft (26.2 m) long with a longest span of 83 ft (25.2 m).

Who owns US302 over Nhrr(conway Scenic Line)?

It is owned by the State Highway Agency.