US Bridges

Bagdad Road over US 4

Good

Strafford County, New Hampshire · .4 Mi. from Jct. Nh 108 · Structure no. 007001140012800

Built
1966
59 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
216 ft
4 main spans
Daily traffic
1,751
2023 count
Owner
State
State Highway Agency

About this bridge

Bagdad Road over US 4 is a steel continuous stringer/multi-beam or girder carrying Bagdad Road over US 4 in Strafford County, New Hampshire. It was built in 1966, 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 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 1,751 vehicles a day, roughly 5% of them trucks, projected to reach 2,591 by 2043. The structure is 216 ft (65.8 m) long and 45 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesBagdad Road
CrossesUS 4
Location.4 Mi. from Jct. Nh 108
CountyStrafford County
StateNew Hampshire
Coordinates43.14289, -70.91684
Functional classUrban Local

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.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length216 ft (65.8 m)
Longest span60 ft (18.3 m)
Deck width45 ft (13.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,751 (2023)
Projected traffic2,591 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$314,000 (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Bagdad Road over US 4 built?

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

What condition is Bagdad Road over US 4 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 Bagdad Road over US 4 carry?

About 1,751 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Bagdad Road over US 4?

The structure is 216 ft (65.8 m) long with a longest span of 60 ft (18.3 m) and a deck 45 ft wide.

Who owns Bagdad Road over US 4?

It is owned by the State Highway Agency.