US Bridges

Nh 33 over CSX

Fair

Rockingham County, New Hampshire · .8 MI JCT I-95 · Structure no. 021701440011500

Built
1971
54 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
70 ft
1 main span
Daily traffic
14,099
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 33 over CSX is a steel stringer/multi-beam or girder carrying Nh 33 over CSX in Rockingham County, New Hampshire. It was built in 1971, so it is 54 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 fair condition with a lowest component rating of 5 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 14,099 vehicles a day, roughly 5% of them trucks, projected to reach 20,866 by 2043. The structure is 70 ft (21.3 m) long and 56 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNh 33
CrossesCSX
Location.8 MI JCT I-95
RouteState Highway 101
CountyRockingham County
StateNew Hampshire
Coordinates43.05752, -70.79749
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.7 US tons
Inventory rating28.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length70 ft (21.3 m)
Longest span63 ft (19.2 m)
Deck width56 ft (17.2 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,099 (2023)
Projected traffic20,866 by 2043
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.1 mi (5 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 33 over CSX built?

It was built in 1971, making it 54 years old in 2025.

What condition is Nh 33 over CSX 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 June 2023.

How much traffic does Nh 33 over CSX carry?

About 14,099 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Nh 33 over CSX?

The structure is 70 ft (21.3 m) long with a longest span of 63 ft (19.2 m) and a deck 56 ft wide.

Who owns Nh 33 over CSX?

It is owned by the State Highway Agency.