US Bridges

US302 over Brook

Fair

Carroll County, New Hampshire · 3.8 Mi. from N.H. 16 · Structure no. 001701280010600

Built
1961
64 years old, rebuilt 2008
Condition
Fair
inspected June 2024
Type
Culvert
Steel
Length
21 ft
2 main spans
Daily traffic
4,065
2023 count
Owner
State
State Highway Agency

About this bridge

US302 over Brook is a steel culvert carrying US302 over Brook in Carroll County, New Hampshire. It was built in 1961 and reconstructed in 2008, so it is 64 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 4,065 vehicles a day, roughly 7% of them trucks, projected to reach 6,016 by 2043. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesUS302
CrossesBrook
Location3.8 Mi. from N.H. 16
RouteU.S. Route 302
CountyCarroll County
StateNew Hampshire
Coordinates44.07923, -71.26117
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span9 ft (2.7 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
CrossesWaterway
Detour if closed19.9 mi (32 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 Brook built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 2008.

What condition is US302 over Brook in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2024.

How much traffic does US302 over Brook carry?

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

How long is US302 over Brook?

The structure is 21 ft (6.4 m) long with a longest span of 9 ft (2.7 m).

Who owns US302 over Brook?

It is owned by the State Highway Agency.