US Bridges

Plummer Road over NH101

Good

Hillsborough County, New Hampshire · 0.5 MI JCT Rt 114 · Structure no. 001901630013900

Built
1995
30 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
235 ft
2 main spans
Daily traffic
423
2023 count
Owner
State
State Highway Agency

About this bridge

Plummer Road over NH101 is a steel continuous stringer/multi-beam or girder carrying Plummer Road over NH101 in Hillsborough County, New Hampshire. It was built in 1995, so it is 30 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 423 vehicles a day, roughly 4% of them trucks, projected to reach 626 by 2043. The structure is 235 ft (71.6 m) long and 36 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesPlummer Road
CrossesNH101
Location0.5 MI JCT Rt 114
RouteCity Street 0
CountyHillsborough County
StateNew Hampshire
Coordinates42.95838, -71.49396
Functional classUrban Local

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 inspectionApril 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 rating88.8 US tons
Inventory rating53.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length235 ft (71.6 m)
Longest span115 ft (35.1 m)
Deck width36 ft (11 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic423 (2023)
Projected traffic626 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

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 Plummer Road over NH101 built?

It was built in 1995, making it 30 years old in 2025.

What condition is Plummer Road 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 Plummer Road over NH101 carry?

About 423 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Plummer Road over NH101?

The structure is 235 ft (71.6 m) long with a longest span of 115 ft (35.1 m) and a deck 36 ft wide.

Who owns Plummer Road over NH101?

It is owned by the State Highway Agency.