US Bridges

I-93 Fee Tpk over Nh 9 Loudon Road

Fair

Merrimack County, New Hampshire · 1.6 MI N JCT RTE 3 · Structure no. 005201630010600

Built
1966
59 years old, rebuilt 2010
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
86 ft
1 main span
Daily traffic
72,557
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-93 Fee Tpk over Nh 9 Loudon Road is a steel stringer/multi-beam or girder carrying I-93 Fee Tpk over Nh 9 Loudon Road in Merrimack County, New Hampshire. It was built in 1966 and reconstructed in 2010, so it is 59 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 72,557 vehicles a day, roughly 6% of them trucks, projected to reach 107,384 by 2043. The structure is 86 ft (26.2 m) long and 87 ft wide.

Location

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CarriesI-93 Fee Tpk
CrossesNh 9 Loudon Road
Location1.6 MI N JCT RTE 3
RouteInterstate 93
CountyMerrimack County
StateNew Hampshire
Coordinates43.20882, -71.53312
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.4 US tons
Inventory rating47.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length86 ft (26.2 m)
Longest span82 ft (25 m)
Deck width87 ft (26.5 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic72,557 (2023)
Projected traffic107,384 by 2043
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-93 Fee Tpk over Nh 9 Loudon Road built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2010.

What condition is I-93 Fee Tpk over Nh 9 Loudon 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 May 2023.

How much traffic does I-93 Fee Tpk over Nh 9 Loudon Road carry?

About 72,557 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is I-93 Fee Tpk over Nh 9 Loudon Road?

The structure is 86 ft (26.2 m) long with a longest span of 82 ft (25 m) and a deck 87 ft wide.

Who owns I-93 Fee Tpk over Nh 9 Loudon Road?

It is owned by the State Toll Authority.