US Bridges

NH101 WB over Chester Road

Good

Rockingham County, New Hampshire · 2.8MI E of Auburn Tl · Structure no. 003701330007500

Built
1981
44 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
70 ft
1 main span
Daily traffic
21,002
2023 count
Owner
State
State Highway Agency

About this bridge

NH101 WB over Chester Road is a steel stringer/multi-beam or girder carrying NH101 WB over Chester Road 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 21,002 vehicles a day, roughly 7% of them trucks, projected to reach 31,082 by 2043. The structure is 70 ft (21.3 m) long and 45 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesNH101 WB
CrossesChester Road
Location2.8MI E of Auburn Tl
RouteState Highway 101
Coordinates43.0402, -71.29338
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
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 rating60.1 US tons
Inventory rating36 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length70 ft (21.3 m)
Longest span65 ft (19.8 m)
Deck width45 ft (13.6 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,002 (2023)
Projected traffic31,082 by 2043
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 WB over Chester Road built?

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

What condition is NH101 WB over Chester Road 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 Chester Road carry?

About 21,002 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is NH101 WB over Chester Road?

The structure is 70 ft (21.3 m) long with a longest span of 65 ft (19.8 m) and a deck 45 ft wide.

Who owns NH101 WB over Chester Road?

It is owned by the State Highway Agency.