US Bridges

US 4 US202 Nh 9 over Suncook River Overflow

Good

Merrimack County, New Hampshire · .4 MI East Jct. Rt 28 · Structure no. 007900880012600

Built
1996
29 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
101 ft
1 main span
Daily traffic
17,061
2023 count
Owner
State
State Highway Agency

About this bridge

US 4 US202 Nh 9 over Suncook River Overflow is a prestressed concrete stringer/multi-beam or girder carrying US 4 US202 Nh 9 over Suncook River Overflow in Merrimack County, New Hampshire. It was built in 1996, so it is 29 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 17,061 vehicles a day, roughly 2% of them trucks, projected to reach 25,250 by 2043. The structure is 101 ft (30.8 m) long and 57 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

CarriesUS 4 US202 Nh 9
CrossesSuncook River Overflow
Location.4 MI East Jct. Rt 28
RouteU.S. Route 4
Coordinates43.22647, -71.35467
Functional classRural Principal Arterial - Other

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating67.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length101 ft (30.8 m)
Longest span97 ft (29.6 m)
Deck width57 ft (17.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,061 (2023)
Projected traffic25,250 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemYes

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 US 4 US202 Nh 9 over Suncook River Overflow built?

It was built in 1996, making it 29 years old in 2025.

What condition is US 4 US202 Nh 9 over Suncook River Overflow 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 2024.

How much traffic does US 4 US202 Nh 9 over Suncook River Overflow carry?

About 17,061 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is US 4 US202 Nh 9 over Suncook River Overflow?

The structure is 101 ft (30.8 m) long with a longest span of 97 ft (29.6 m) and a deck 57 ft wide.

Who owns US 4 US202 Nh 9 over Suncook River Overflow?

It is owned by the State Highway Agency.