US Bridges

NH101 over NH122

Good

Hillsborough County, New Hampshire · 1.3 MI Milford Tl · Structure no. 000701650010400

Built
1969
56 years old, rebuilt 2011
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
173 ft
3 main spans
Daily traffic
11,884
2023 count
Owner
State
State Highway Agency

About this bridge

NH101 over NH122 is a steel continuous stringer/multi-beam or girder carrying NH101 over NH122 in Hillsborough County, New Hampshire. It was built in 1969 and reconstructed in 2011, so it is 56 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 11,884 vehicles a day, roughly 7% of them trucks, projected to reach 17,588 by 2043. The structure is 173 ft (52.7 m) long and 46 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesNH101
CrossesNH122
Location1.3 MI Milford Tl
RouteState Highway 101
CountyHillsborough County
StateNew Hampshire
Coordinates42.84532, -71.61548
Functional classUrban Other Principal Arterial

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 2023
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 rating56.3 US tons
Inventory rating33.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length173 ft (52.7 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 traffic11,884 (2023)
Projected traffic17,588 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 NH122 built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 2011.

What condition is NH101 over NH122 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 2023.

How much traffic does NH101 over NH122 carry?

About 11,884 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is NH101 over NH122?

The structure is 173 ft (52.7 m) long with a longest span of 66 ft (20.1 m) and a deck 46 ft wide.

Who owns NH101 over NH122?

It is owned by the State Highway Agency.