US Bridges

New Boston Road over Powwow River

Good

Rockingham County, New Hampshire · 0.6 MI FR Nh RTE 117 · Structure no. 013801160011300

Built
2009
16 years old
Condition
Good
inspected September 2024
Type
Culvert
Concrete
Length
22 ft
1 main span
Daily traffic
2,286
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

New Boston Road over Powwow River is a concrete culvert carrying New Boston Road over Powwow River in Rockingham County, New Hampshire. It was built in 2009, so it is 16 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 2,286 vehicles a day, roughly 4% of them trucks, projected to reach 3,383 by 2043. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesNew Boston Road
CrossesPowwow River
Location0.6 MI FR Nh RTE 117
CountyRockingham County
StateNew Hampshire
Coordinates42.91557, -71.04638
Functional classUrban 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 protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating86.1 US tons
Inventory rating51.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 25 or greater
Structure length22 ft (6.7 m)
Longest span20 ft (6.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,286 (2023)
Projected traffic3,383 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 New Boston Road over Powwow River built?

It was built in 2009, making it 16 years old in 2025.

What condition is New Boston Road over Powwow River 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 2024.

How much traffic does New Boston Road over Powwow River carry?

About 2,286 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is New Boston Road over Powwow River?

The structure is 22 ft (6.7 m) long with a longest span of 20 ft (6.1 m).

Who owns New Boston Road over Powwow River?

It is owned by the City or Municipal Highway Agency.