US Bridges

US302 over Nancy Brook

Good

Carroll County, New Hampshire · 8.3 MI Carroll Tl · Structure no. 011602010007200

Built
1978
47 years old
Condition
Good
inspected August 2024
Type
Culvert
Concrete
Length
41 ft
1 main span
Daily traffic
1,978
2023 count
Owner
State
State Highway Agency

About this bridge

US302 over Nancy Brook is a concrete culvert carrying US302 over Nancy Brook in Carroll County, New Hampshire. It was built in 1978, so it is 47 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 1,978 vehicles a day, roughly 7% of them trucks, projected to reach 2,927 by 2043. The structure is 41 ft (12.5 m) long. If it were closed, the detour would be 47.8 mi (77 km).

Location

Open in Google Maps
CarriesUS302
CrossesNancy Brook
Location8.3 MI Carroll Tl
RouteU.S. Route 302
CountyCarroll County
StateNew Hampshire
Coordinates44.1126, -71.35377
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2024
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 rating110.1 US tons
Inventory rating63.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length41 ft (12.5 m)
Longest span41 ft (12.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,978 (2023)
Projected traffic2,927 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 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)
NavigationNo navigation control on waterway

Frequently asked questions

When was US302 over Nancy Brook built?

It was built in 1978, making it 47 years old in 2025.

What condition is US302 over Nancy 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 2024.

How much traffic does US302 over Nancy Brook carry?

About 1,978 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US302 over Nancy Brook?

The structure is 41 ft (12.5 m) long with a longest span of 41 ft (12.5 m).

Who owns US302 over Nancy Brook?

It is owned by the State Highway Agency.