US Bridges

NH101 over Perry Road

Fair

Hillsborough County, New Hampshire · 0.3 MI W JCT RTE 13 · Structure no. 017200830012400

Built
1978
47 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
70 ft
1 main span
Daily traffic
17,533
2023 count
Owner
State
State Highway Agency

About this bridge

NH101 over Perry Road is a steel stringer/multi-beam or girder carrying NH101 over Perry Road in Hillsborough County, New Hampshire. It was built in 1978, so it is 47 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 17,533 vehicles a day, roughly 7% of them trucks, projected to reach 25,948 by 2043. The structure is 70 ft (21.3 m) long and 46 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNH101
CrossesPerry Road
Location0.3 MI W JCT RTE 13
RouteState Highway 101
CountyHillsborough County
StateNew Hampshire
Coordinates42.83423, -71.69297
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to 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 rating71.7 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length70 ft (21.3 m)
Longest span66 ft (20.1 m)
Deck width46 ft (14 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,533 (2023)
Projected traffic25,948 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 over Perry Road built?

It was built in 1978, making it 47 years old in 2025.

What condition is NH101 over Perry Road in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does NH101 over Perry Road carry?

About 17,533 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is NH101 over Perry Road?

The structure is 70 ft (21.3 m) long with a longest span of 66 ft (20.1 m) and a deck 46 ft wide.

Who owns NH101 over Perry Road?

It is owned by the State Highway Agency.