US Bridges

I-93 Fee Tpk SB over CSX

Fair

Merrimack County, New Hampshire · .2 MI N of JCT Rt 3-A · Structure no. 005202030008900

Built
1957
68 years old, rebuilt 1988
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
191 ft
3 main spans
Daily traffic
38,086
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-93 Fee Tpk SB over CSX is a steel continuous stringer/multi-beam or girder carrying I-93 Fee Tpk SB over CSX in Merrimack County, New Hampshire. It was built in 1957 and reconstructed in 1988, so it is 68 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 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 38,086 vehicles a day, roughly 6% of them trucks, projected to reach 56,367 by 2043. The structure is 191 ft (58.2 m) long and 53 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesI-93 Fee Tpk SB
CrossesCSX
Location.2 MI N of JCT Rt 3-A
RouteInterstate 93
CountyMerrimack County
StateNew Hampshire
Coordinates43.1816, -71.52821
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating61 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length191 ft (58.2 m)
Longest span71 ft (21.6 m)
Deck width53 ft (16.2 m)
Roadway width51 ft (15.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic38,086 (2023)
Projected traffic56,367 by 2043
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible 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 I-93 Fee Tpk SB over CSX built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1988.

What condition is I-93 Fee Tpk SB 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 May 2023.

How much traffic does I-93 Fee Tpk SB over CSX carry?

About 38,086 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is I-93 Fee Tpk SB over CSX?

The structure is 191 ft (58.2 m) long with a longest span of 71 ft (21.6 m) and a deck 53 ft wide.

Who owns I-93 Fee Tpk SB over CSX?

It is owned by the State Toll Authority.