US Bridges

Troy Road over Shaker Brook

Fair

Cheshire County, New Hampshire · 1.3 Mi. from Troy Tl · Structure no. 016300920007200

Built
1939
86 years old
Condition
Fair
inspected May 2023
Type
Frame
Concrete
Length
51 ft
1 main span
Daily traffic
609
2023 count
Owner
State
State Highway Agency

About this bridge

Troy Road over Shaker Brook is a concrete frame carrying Troy Road over Shaker Brook in Cheshire County, New Hampshire. It was built in 1939, so it is 86 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 609 vehicles a day, roughly 4% of them trucks, projected to reach 901 by 2043. The structure is 51 ft (15.5 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesTroy Road
CrossesShaker Brook
Location1.3 Mi. from Troy Tl
RouteState Highway 0
CountyCheshire County
StateNew Hampshire
Coordinates42.86633, -72.18799
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating60.7 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length51 ft (15.5 m)
Longest span45 ft (13.7 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic609 (2023)
Projected traffic901 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

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 Troy Road over Shaker Brook built?

It was built in 1939, making it 86 years old in 2025.

What condition is Troy Road over Shaker 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 May 2023.

How much traffic does Troy Road over Shaker Brook carry?

About 609 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Troy Road over Shaker Brook?

The structure is 51 ft (15.5 m) long with a longest span of 45 ft (13.7 m) and a deck 28 ft wide.

Who owns Troy Road over Shaker Brook?

It is owned by the State Highway Agency.