US Bridges

NH101 WB over US 3

Good

Hillsborough County, New Hampshire · NH101 WB over US 3 · Structure no. 001901820013200

Built
2006
19 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
164 ft
1 main span
Daily traffic
24,986
2023 count
Owner
State
State Highway Agency

About this bridge

NH101 WB over US 3 is a steel stringer/multi-beam or girder carrying NH101 WB over US 3 in Hillsborough County, New Hampshire. It was built in 2006, so it is 19 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 24,986 vehicles a day, roughly 8% of them trucks, projected to reach 36,979 by 2043. The structure is 164 ft (50 m) long and 45 ft wide.

Location

Open in Google Maps
CarriesNH101 WB
CrossesUS 3
LocationNH101 WB over US 3
RouteState Highway 101
CountyHillsborough County
StateNew Hampshire
Coordinates42.95121, -71.47747
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.1 US tons
Inventory rating54.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length164 ft (50 m)
Longest span158 ft (48.2 m)
Deck width45 ft (13.7 m)
Roadway width41 ft (12.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,986 (2023)
Projected traffic36,979 by 2043
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate 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)
NavigationNot applicable (no waterway)

Frequently asked questions

When was NH101 WB over US 3 built?

It was built in 2006, making it 19 years old in 2025.

What condition is NH101 WB over US 3 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 April 2023.

How much traffic does NH101 WB over US 3 carry?

About 24,986 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is NH101 WB over US 3?

The structure is 164 ft (50 m) long with a longest span of 158 ft (48.2 m) and a deck 45 ft wide.

Who owns NH101 WB over US 3?

It is owned by the State Highway Agency.