US Bridges

Archertown Road over Archertown Brook

Good

Grafton County, New Hampshire · 0.7 MI FR High Bridge RD · Structure no. 020300950011800

Built
2014
11 years old
Condition
Good
inspected June 2023
Type
Frame
Concrete
Length
42 ft
1 main span
Daily traffic
237
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Archertown Road over Archertown Brook is a concrete frame carrying Archertown Road over Archertown Brook in Grafton County, New Hampshire. It was built in 2014, so it is 11 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 237 vehicles a day, roughly 4% of them trucks, projected to reach 350 by 2043. The structure is 42 ft (12.9 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesArchertown Road
CrossesArchertown Brook
Location0.7 MI FR High Bridge RD
CountyGrafton County
StateNew Hampshire
Coordinates43.90411, -72.10785
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84.4 US tons
Inventory rating65 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length42 ft (12.9 m)
Longest span40 ft (12.1 m)
Deck width27 ft (8.2 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic237 (2023)
Projected traffic350 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 Archertown Road over Archertown Brook built?

It was built in 2014, making it 11 years old in 2025.

What condition is Archertown Road over Archertown 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 June 2023.

How much traffic does Archertown Road over Archertown Brook carry?

About 237 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Archertown Road over Archertown Brook?

The structure is 42 ft (12.9 m) long with a longest span of 40 ft (12.1 m) and a deck 27 ft wide.

Who owns Archertown Road over Archertown Brook?

It is owned by the City or Municipal Highway Agency.