US Bridges

I-393 US 4 US202W over Soucook River

Good

Merrimack County, New Hampshire · Concord Pembrook Tl · Structure no. 005201610018400

Built
1988
37 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
396 ft
2 main spans
Daily traffic
8,164
2023 count
Owner
State
State Highway Agency

About this bridge

I-393 US 4 US202W over Soucook River is a steel continuous stringer/multi-beam or girder carrying I-393 US 4 US202W over Soucook River in Merrimack County, New Hampshire. It was built in 1988, so it is 37 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 8,164 vehicles a day, roughly 6% of them trucks, projected to reach 12,082 by 2043. The structure is 396 ft (120.7 m) long and 45 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesI-393 US 4 US202W
CrossesSoucook River
LocationConcord Pembrook Tl
RouteInterstate 393
CountyMerrimack County
StateNew Hampshire
Coordinates43.2351, -71.46343
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.7 US tons
Inventory rating57.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length396 ft (120.7 m)
Longest span200 ft (61 m)
Deck width45 ft (13.7 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,164 (2023)
Projected traffic12,082 by 2043
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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-393 US 4 US202W over Soucook River built?

It was built in 1988, making it 37 years old in 2025.

What condition is I-393 US 4 US202W over Soucook 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 August 2023.

How much traffic does I-393 US 4 US202W over Soucook River carry?

About 8,164 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is I-393 US 4 US202W over Soucook River?

The structure is 396 ft (120.7 m) long with a longest span of 200 ft (61 m) and a deck 45 ft wide.

Who owns I-393 US 4 US202W over Soucook River?

It is owned by the State Highway Agency.