US Bridges

NH123 over Warren Brook

Good

Cheshire County, New Hampshire · 1.0 MI SE JCT Nh 123A · Structure no. 000500870015600

Built
2008
17 years old
Condition
Good
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
52 ft
1 main span
Daily traffic
1,124
2023 count
Owner
State
State Highway Agency

About this bridge

NH123 over Warren Brook is a prestressed concrete box beam or girders - multiple carrying NH123 over Warren Brook in Cheshire County, New Hampshire. It was built in 2008, so it is 17 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 1,124 vehicles a day, roughly 5% of them trucks, projected to reach 1,663 by 2043. The structure is 52 ft (15.8 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNH123
CrossesWarren Brook
Location1.0 MI SE JCT Nh 123A
RouteState Highway 123
CountyCheshire County
StateNew Hampshire
Coordinates43.14794, -72.33345
Functional classRural Major Collector

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 protection9 ExcellentNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.3 US tons
Inventory rating46.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length52 ft (15.8 m)
Longest span48 ft (14.6 m)
Deck width34 ft (10.3 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,124 (2023)
Projected traffic1,663 by 2043
Trucks5%
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

OwnerState Highway Agency
Maintained byState 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 NH123 over Warren Brook built?

It was built in 2008, making it 17 years old in 2025.

What condition is NH123 over Warren 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 May 2024.

How much traffic does NH123 over Warren Brook carry?

About 1,124 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is NH123 over Warren Brook?

The structure is 52 ft (15.8 m) long with a longest span of 48 ft (14.6 m) and a deck 34 ft wide.

Who owns NH123 over Warren Brook?

It is owned by the State Highway Agency.