US Bridges

US 4 over Bunker Creek

Good

Strafford County, New Hampshire · 1.8 MI W. Madbury T.L. · Structure no. 007001450011700

Built
2020
5 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
63 ft
1 main span
Daily traffic
19,707
2023 count
Owner
State
State Highway Agency

About this bridge

US 4 over Bunker Creek is a steel stringer/multi-beam or girder carrying US 4 over Bunker Creek in Strafford County, New Hampshire. It was built in 2020, so it is 5 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 19,707 vehicles a day, roughly 5% of them trucks, projected to reach 29,166 by 2043. The structure is 63 ft (19.3 m) long and 37 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesUS 4
CrossesBunker Creek
Location1.8 MI W. Madbury T.L.
RouteU.S. Route 4
CountyStrafford County
StateNew Hampshire
Coordinates43.13359, -70.88612
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.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating61.6 US tons
Inventory rating47.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length63 ft (19.3 m)
Longest span60 ft (18.3 m)
Deck width37 ft (11.3 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,707 (2023)
Projected traffic29,166 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 over Bunker Creek built?

It was built in 2020, making it 5 years old in 2025.

What condition is US 4 over Bunker 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 June 2024.

How much traffic does US 4 over Bunker Creek carry?

About 19,707 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is US 4 over Bunker Creek?

The structure is 63 ft (19.3 m) long with a longest span of 60 ft (18.3 m) and a deck 37 ft wide.

Who owns US 4 over Bunker Creek?

It is owned by the State Highway Agency.