US Bridges

US 3 Nh 11 NH132 over Gulf Brook

Fair

Belknap County, New Hampshire · 3.3 MI NE Franklin Tl · Structure no. 025601050006700

Built
1936
89 years old, rebuilt 1998
Condition
Fair
inspected June 2024
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
23,105
2023 count
Owner
State
State Highway Agency

About this bridge

US 3 Nh 11 NH132 over Gulf Brook is a concrete continuous culvert carrying US 3 Nh 11 NH132 over Gulf Brook in Belknap County, New Hampshire. It was built in 1936 and reconstructed in 1998, so it is 89 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 23,105 vehicles a day, roughly 4% of them trucks, projected to reach 34,195 by 2043. The structure is 23 ft (7 m) long. If it were closed, the detour would be 5 mi (8 km).

CarriesUS 3 Nh 11 NH132
CrossesGulf Brook
Location3.3 MI NE Franklin Tl
RouteU.S. Route 3
Coordinates43.45612, -71.56572
Functional classUrban Other Principal Arterial

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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.5 US tons
Inventory rating39.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,105 (2023)
Projected traffic34,195 by 2043
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 US 3 Nh 11 NH132 over Gulf Brook built?

It was built in 1936, making it 89 years old in 2025. It was reconstructed in 1998.

What condition is US 3 Nh 11 NH132 over Gulf 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 US 3 Nh 11 NH132 over Gulf Brook carry?

About 23,105 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is US 3 Nh 11 NH132 over Gulf Brook?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m).

Who owns US 3 Nh 11 NH132 over Gulf Brook?

It is owned by the State Highway Agency.