US Bridges

Reed Road over West Alton Brook

Good

Belknap County, New Hampshire · 0.9 Gilford Tl · Structure no. 000600780027500

Built
2011
14 years old
Condition
Good
inspected September 2023
Type
Culvert
Concrete
Length
22 ft
1 main span
Daily traffic
96
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Reed Road over West Alton Brook is a concrete culvert carrying Reed Road over West Alton Brook in Belknap County, New Hampshire. It was built in 2011, so it is 14 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 96 vehicles a day, roughly 4% of them trucks, projected to reach 142 by 2043. The structure is 22 ft (6.7 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesReed Road
CrossesWest Alton Brook
Location0.9 Gilford Tl
CountyBelknap County
StateNew Hampshire
Coordinates43.53403, -71.32132
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89 US tons
Inventory rating53.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length22 ft (6.7 m)
Longest span21 ft (6.3 m)
Deck width36 ft (10.9 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic96 (2023)
Projected traffic142 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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)
NavigationNo navigation control on waterway

Frequently asked questions

When was Reed Road over West Alton Brook built?

It was built in 2011, making it 14 years old in 2025.

What condition is Reed Road over West Alton 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 September 2023.

How much traffic does Reed Road over West Alton Brook carry?

About 96 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Reed Road over West Alton Brook?

The structure is 22 ft (6.7 m) long with a longest span of 21 ft (6.3 m) and a deck 36 ft wide.

Who owns Reed Road over West Alton Brook?

It is owned by the City or Municipal Highway Agency.