US Bridges

US 4 over Nhrr(abd)

Good

Grafton County, New Hampshire · 3.8 MI from Orange Tl · Structure no. 009901300009400

Built
1941
84 years old
Condition
Good
inspected May 2024
Type
Culvert
Concrete
Length
28 ft
1 main span
Daily traffic
1,858
2023 count
Owner
State
State Highway Agency

About this bridge

US 4 over Nhrr(abd) is a concrete culvert carrying US 4 over Nhrr(abd) in Grafton County, New Hampshire. It was built in 1941, so it is 84 years old, older 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 1,858 vehicles a day, roughly 7% of them trucks, projected to reach 2,749 by 2043. The structure is 28 ft (8.5 m) long and 89 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesUS 4
CrossesNhrr(abd)
Location3.8 MI from Orange Tl
RouteU.S. Route 4
CountyGrafton County
StateNew Hampshire
Coordinates43.57192, -71.97112
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Culvert7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99 US tons
Inventory rating55 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 15
Structure length28 ft (8.5 m)
Longest span28 ft (8.5 m)
Deck width89 ft (27 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,858 (2023)
Projected traffic2,749 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesPedestrian / bicycle
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
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 US 4 over Nhrr(abd) built?

It was built in 1941, making it 84 years old in 2025.

What condition is US 4 over Nhrr(abd) 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 May 2024.

How much traffic does US 4 over Nhrr(abd) carry?

About 1,858 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US 4 over Nhrr(abd)?

The structure is 28 ft (8.5 m) long with a longest span of 28 ft (8.5 m) and a deck 89 ft wide.

Who owns US 4 over Nhrr(abd)?

It is owned by the State Highway Agency.