US Bridges

NH101 Ramp A-B over NH101

Good

Rockingham County, New Hampshire · 1.9MI E of Auburn Tl · Structure no. 003701190007200

Built
1981
44 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
260 ft
2 main spans
Daily traffic
6,073
2023 count
Owner
State
State Highway Agency

About this bridge

NH101 Ramp A-B over NH101 is a steel continuous stringer/multi-beam or girder carrying NH101 Ramp A-B over NH101 in Rockingham County, New Hampshire. It was built in 1981, so it is 44 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 6,073 vehicles a day, roughly 7% of them trucks, projected to reach 8,988 by 2043. The structure is 260 ft (79.2 m) long and 74 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesNH101 Ramp A-B
CrossesNH101
Location1.9MI E of Auburn Tl
RouteState Highway 0
CountyRockingham County
StateNew Hampshire
Coordinates43.03788, -71.30975
Functional classRural Major Collector

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.
Substructure8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length260 ft (79.2 m)
Longest span127 ft (38.7 m)
Deck width74 ft (22.7 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,073 (2023)
Projected traffic8,988 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.1 mi (13 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 NH101 Ramp A-B over NH101 built?

It was built in 1981, making it 44 years old in 2025.

What condition is NH101 Ramp A-B over NH101 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 Ramp A-B over NH101 carry?

About 6,073 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is NH101 Ramp A-B over NH101?

The structure is 260 ft (79.2 m) long with a longest span of 127 ft (38.7 m) and a deck 74 ft wide.

Who owns NH101 Ramp A-B over NH101?

It is owned by the State Highway Agency.