US Bridges

NH111 over CSX

Good

Rockingham County, New Hampshire · 3.04MI NW JCT 1-A · Structure no. 019701360008800

Built
1927
98 years old, rebuilt 1995
Condition
Good
inspected July 2023
Type
Slab
Prestressed Concrete
Length
37 ft
1 main span
Daily traffic
3,778
2023 count
Owner
State
State Highway Agency

About this bridge

NH111 over CSX is a prestressed concrete slab carrying NH111 over CSX in Rockingham County, New Hampshire. It was built in 1927 and reconstructed in 1995, so it is 98 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 3,778 vehicles a day, roughly 24% of them trucks, projected to reach 5,591 by 2043. The structure is 37 ft (11.3 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNH111
CrossesCSX
Location3.04MI NW JCT 1-A
RouteState Highway 101D
CountyRockingham County
StateNew Hampshire
Coordinates42.97269, -70.82855
Functional classUrban 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.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71.1 US tons
Inventory rating40.3 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length37 ft (11.3 m)
Longest span32 ft (9.8 m)
Deck width45 ft (13.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,778 (2023)
Projected traffic5,591 by 2043
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
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)
NavigationNot applicable (no waterway)

Frequently asked questions

When was NH111 over CSX built?

It was built in 1927, making it 98 years old in 2025. It was reconstructed in 1995.

What condition is NH111 over CSX 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 July 2023.

How much traffic does NH111 over CSX carry?

About 3,778 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is NH111 over CSX?

The structure is 37 ft (11.3 m) long with a longest span of 32 ft (9.8 m) and a deck 45 ft wide.

Who owns NH111 over CSX?

It is owned by the State Highway Agency.