US Bridges

US 3 Fee Tpk NB over Canal Service Road

Fair

Hillsborough County, New Hampshire · 0.5 MI from Nh 130 · Structure no. 017701010011200

Built
1955
70 years old, rebuilt 1996
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
208 ft
2 main spans
Daily traffic
59,758
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

US 3 Fee Tpk NB over Canal Service Road is a steel stringer/multi-beam or girder carrying US 3 Fee Tpk NB over Canal Service Road in Hillsborough County, New Hampshire. It was built in 1955 and reconstructed in 1996, so it is 70 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 6 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 59,758 vehicles a day, roughly 8% of them trucks, projected to reach 88,441 by 2043. The structure is 208 ft (63.4 m) long and 84 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesUS 3 Fee Tpk NB
CrossesCanal Service Road
Location0.5 MI from Nh 130
RouteU.S. Route 3
CountyHillsborough County
StateNew Hampshire
Coordinates42.76101, -71.49313
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.4 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length208 ft (63.4 m)
Longest span100 ft (30.5 m)
Deck width84 ft (25.6 m)
Roadway width81 ft (24.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic59,758 (2023)
Projected traffic88,441 by 2043
Trucks8%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed3.7 mi (6 km)
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
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 US 3 Fee Tpk NB over Canal Service Road built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1996.

What condition is US 3 Fee Tpk NB over Canal Service Road 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 April 2024.

How much traffic does US 3 Fee Tpk NB over Canal Service Road carry?

About 59,758 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is US 3 Fee Tpk NB over Canal Service Road?

The structure is 208 ft (63.4 m) long with a longest span of 100 ft (30.5 m) and a deck 84 ft wide.

Who owns US 3 Fee Tpk NB over Canal Service Road?

It is owned by the State Toll Authority.