US Bridges

US 1 over CSX

Poor

Rockingham County, New Hampshire · 1.1MI from Rye Tl · Structure no. 019701480013200

Built
1935
90 years old
Condition
Poor
inspected November 2024
Type
Tee Beam
Concrete
Length
42 ft
1 main span
Daily traffic
15,436
2023 count
Owner
State
State Highway Agency

About this bridge

US 1 over CSX is a concrete tee beam carrying US 1 over CSX in Rockingham County, New Hampshire. It was built in 1935, so it is 90 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 poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 15,436 vehicles a day, roughly 7% of them trucks, projected to reach 22,845 by 2043. The structure is 42 ft (12.8 m) long and 42 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesUS 1
CrossesCSX
Location1.1MI from Rye Tl
RouteU.S. Route 1
CountyRockingham County
StateNew Hampshire
Coordinates42.98878, -70.82319
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 8 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating41.9 US tons
Inventory rating25.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length42 ft (12.8 m)
Longest span36 ft (11 m)
Deck width42 ft (12.9 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,436 (2023)
Projected traffic22,845 by 2043
Trucks7%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible 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)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 1 over CSX built?

It was built in 1935, making it 90 years old in 2025.

What condition is US 1 over CSX in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2024.

How much traffic does US 1 over CSX carry?

About 15,436 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US 1 over CSX?

The structure is 42 ft (12.8 m) long with a longest span of 36 ft (11 m) and a deck 42 ft wide.

Who owns US 1 over CSX?

It is owned by the State Highway Agency.