US Bridges

NH153 over Branch River

Good

Carroll County, New Hampshire · 3.1 MI N Milton Tl · Structure no. 026102450006600

Built
1932
93 years old, rebuilt 1992
Condition
Good
inspected June 2024
Type
Frame
Concrete
Length
32 ft
1 main span
Daily traffic
2,529
2023 count
Owner
State
State Highway Agency

About this bridge

NH153 over Branch River is a concrete frame carrying NH153 over Branch River in Carroll County, New Hampshire. It was built in 1932 and reconstructed in 1992, so it is 93 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 2,529 vehicles a day, roughly 4% of them trucks, projected to reach 3,742 by 2043. The structure is 32 ft (9.8 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesNH153
CrossesBranch River
Location3.1 MI N Milton Tl
RouteState Highway 16B
Coordinates43.52758, -71.02315
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating41.8 US tons
Inventory rating25 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,529 (2023)
Projected traffic3,742 by 2043
Trucks4%
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 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 NH153 over Branch River built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1992.

What condition is NH153 over Branch River 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 NH153 over Branch River carry?

About 2,529 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is NH153 over Branch River?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 27 ft wide.

Who owns NH153 over Branch River?

It is owned by the State Highway Agency.