US Bridges

South River Road over Great Brook

Fair

Cheshire County, New Hampshire · 1.4 MI FR Westmoreland T · Structure no. 026201960004600

Built
1950
75 years old
Condition
Fair
inspected July 2023
Type
Culvert
Steel
Length
35 ft
2 main spans
Daily traffic
121
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

South River Road over Great Brook is a steel culvert carrying South River Road over Great Brook in Cheshire County, New Hampshire. It was built in 1950, so it is 75 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 121 vehicles a day, roughly 4% of them trucks, projected to reach 179 by 2043. The structure is 35 ft (10.7 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSouth River Road
CrossesGreat Brook
Location1.4 MI FR Westmoreland T
CountyCheshire County
StateNew Hampshire
Coordinates43.03829, -72.45402
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating84.2 US tons
Inventory rating50.4 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length35 ft (10.7 m)
Longest span15 ft (4.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic121 (2023)
Projected traffic179 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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 South River Road over Great Brook built?

It was built in 1950, making it 75 years old in 2025.

What condition is South River Road over Great 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 July 2023.

How much traffic does South River Road over Great Brook carry?

About 121 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is South River Road over Great Brook?

The structure is 35 ft (10.7 m) long with a longest span of 15 ft (4.6 m).

Who owns South River Road over Great Brook?

It is owned by the City or Municipal Highway Agency.