US Bridges

Nh 28 over Csx(abd)

Good

Carroll County, New Hampshire · 1.6 MI Wolfeboro T.L. · Structure no. 020401940014600

Built
1959
66 years old, rebuilt 2021
Condition
Good
inspected June 2023
Type
Slab
Concrete Continuous
Length
106 ft
3 main spans
Daily traffic
4,556
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 28 over Csx(abd) is a concrete continuous slab carrying Nh 28 over Csx(abd) in Carroll County, New Hampshire. It was built in 1959 and reconstructed in 2021, so it is 66 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 4,556 vehicles a day, roughly 7% of them trucks, projected to reach 6,742 by 2043. The structure is 106 ft (32.3 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesNh 28
CrossesCsx(abd)
Location1.6 MI Wolfeboro T.L.
RouteState Highway 28
CountyCarroll County
StateNew Hampshire
Coordinates43.69135, -71.11785
Functional classRural Minor Arterial

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.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.2 US tons
Inventory rating48.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length106 ft (32.3 m)
Longest span40 ft (12.2 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,556 (2023)
Projected traffic6,742 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
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)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nh 28 over Csx(abd) built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2021.

What condition is Nh 28 over Csx(abd) 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 2023.

How much traffic does Nh 28 over Csx(abd) carry?

About 4,556 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Nh 28 over Csx(abd)?

The structure is 106 ft (32.3 m) long with a longest span of 40 ft (12.2 m) and a deck 43 ft wide.

Who owns Nh 28 over Csx(abd)?

It is owned by the State Highway Agency.