US Bridges

County Road over Great Brook

Good

Cheshire County, New Hampshire · 5.52 MI Surry Tl · Structure no. 026201830008100

Built
1968
57 years old
Condition
Good
inspected June 2024
Type
Culvert
Steel
Length
20 ft
1 main span
Daily traffic
314
2023 count
Owner
State
State Highway Agency

About this bridge

County Road over Great Brook is a steel culvert carrying County Road over Great Brook in Cheshire County, New Hampshire. It was built in 1968, so it is 57 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 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 314 vehicles a day, roughly 4% of them trucks, projected to reach 464 by 2043. The structure is 20 ft (6.1 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCounty Road
CrossesGreat Brook
Location5.52 MI Surry Tl
RouteState Highway 0
CountyCheshire County
StateNew Hampshire
Coordinates43.04719, -72.41938
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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJune 2024
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 rating59 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadH 20
Structure length20 ft (6.1 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 traffic314 (2023)
Projected traffic464 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

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 County Road over Great Brook built?

It was built in 1968, making it 57 years old in 2025.

What condition is County Road over Great 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 2024.

How much traffic does County Road over Great Brook carry?

About 314 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is County Road over Great Brook?

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

Who owns County Road over Great Brook?

It is owned by the State Highway Agency.