US Bridges

Whittier Road over Stony Brook

Good

Carroll County, New Hampshire · 5.7 MI E Tamworth Tl · Structure no. 025201630013200

Built
2016
9 years old
Condition
Good
inspected October 2023
Type
Frame
Concrete
Length
27 ft
1 main span
Daily traffic
448
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Whittier Road over Stony Brook is a concrete frame carrying Whittier Road over Stony Brook in Carroll County, New Hampshire. It was built in 2016, so it is 9 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 448 vehicles a day, roughly 7% of them trucks, projected to reach 663 by 2043. The structure is 27 ft (8.2 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesWhittier Road
CrossesStony Brook
Location5.7 MI E Tamworth Tl
CountyCarroll County
StateNew Hampshire
Coordinates43.82672, -71.23686
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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionOctober 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 adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.1 US tons
Inventory rating42.5 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length27 ft (8.2 m)
Longest span25 ft (7.7 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic448 (2023)
Projected traffic663 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Whittier Road over Stony Brook built?

It was built in 2016, making it 9 years old in 2025.

What condition is Whittier Road over Stony 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 October 2023.

How much traffic does Whittier Road over Stony Brook carry?

About 448 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Whittier Road over Stony Brook?

The structure is 27 ft (8.2 m) long with a longest span of 25 ft (7.7 m) and a deck 27 ft wide.

Who owns Whittier Road over Stony Brook?

It is owned by the City or Municipal Highway Agency.