US Bridges

I-93 Fee Tpk NB over I-89 Turkey River

Good

Merrimack County, New Hampshire · Bow Interchange. · Structure no. 002701360015800

Built
2014
11 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
263 ft
2 main spans
Daily traffic
34,805
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-93 Fee Tpk NB over I-89 Turkey River is a steel continuous stringer/multi-beam or girder carrying I-93 Fee Tpk NB over I-89 Turkey River in Merrimack County, New Hampshire. It was built in 2014, so it is 11 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 good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 34,805 vehicles a day, roughly 2% of them trucks, projected to reach 51,511 by 2043. The structure is 263 ft (80.2 m) long and 63 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesI-93 Fee Tpk NB
CrossesI-89 Turkey River
LocationBow Interchange.
RouteInterstate 93
CountyMerrimack County
StateNew Hampshire
Coordinates43.17051, -71.53015
Functional classUrban Principal Arterial - Interstate

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.6 US tons
Inventory rating54.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length263 ft (80.2 m)
Longest span150 ft (45.7 m)
Deck width63 ft (19.2 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic34,805 (2023)
Projected traffic51,511 by 2043
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed9.9 mi (16 km)
TollOn a toll 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)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-93 Fee Tpk NB over I-89 Turkey River built?

It was built in 2014, making it 11 years old in 2025.

What condition is I-93 Fee Tpk NB over I-89 Turkey River 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 April 2024.

How much traffic does I-93 Fee Tpk NB over I-89 Turkey River carry?

About 34,805 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is I-93 Fee Tpk NB over I-89 Turkey River?

The structure is 263 ft (80.2 m) long with a longest span of 150 ft (45.7 m) and a deck 63 ft wide.

Who owns I-93 Fee Tpk NB over I-89 Turkey River?

It is owned by the State Toll Authority.