US Bridges

I-93 NB over Indian Creek

Good

Grafton County, New Hampshire · 0.9 MI Franconia Tl · Structure no. 024552180012800

Built
1972
53 years old
Condition
Good
inspected May 2023
Type
Culvert
Concrete Continuous
Length
31 ft
2 main spans
Daily traffic
2,724
2023 count
Owner
State
State Highway Agency

About this bridge

I-93 NB over Indian Creek is a concrete continuous culvert carrying I-93 NB over Indian Creek in Grafton County, New Hampshire. It was built in 1972, so it is 53 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,724 vehicles a day, roughly 9% of them trucks, projected to reach 4,031 by 2043. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-93 NB
CrossesIndian Creek
Location0.9 MI Franconia Tl
RouteInterstate 93
CountyGrafton County
StateNew Hampshire
Coordinates44.24756, -71.76113
Functional classRural 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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length31 ft (9.4 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,724 (2023)
Projected traffic4,031 by 2043
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
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 NB over Indian Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is I-93 NB over Indian Creek 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 May 2023.

How much traffic does I-93 NB over Indian Creek carry?

About 2,724 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-93 NB over Indian Creek?

The structure is 31 ft (9.4 m) long with a longest span of 14 ft (4.3 m).

Who owns I-93 NB over Indian Creek?

It is owned by the State Highway Agency.