US Bridges

Wilder Road over Nubanusit Brook

Good

Hillsborough County, New Hampshire · 0.1 MI FR Main ST · Structure no. 020800550011200

Built
2004
21 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
59 ft
1 main span
Daily traffic
222
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Wilder Road over Nubanusit Brook is a steel stringer/multi-beam or girder carrying Wilder Road over Nubanusit Brook in Hillsborough County, New Hampshire. It was built in 2004, so it is 21 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 222 vehicles a day, roughly 4% of them trucks, projected to reach 328 by 2043. The structure is 59 ft (18 m) long and 28 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesWilder Road
CrossesNubanusit Brook
Location0.1 MI FR Main ST
CountyHillsborough County
StateNew Hampshire
Coordinates42.88883, -71.98512
Functional classRural 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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating76.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length59 ft (18 m)
Longest span55 ft (16.8 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic222 (2023)
Projected traffic328 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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)
NavigationNo navigation control on waterway

Frequently asked questions

When was Wilder Road over Nubanusit Brook built?

It was built in 2004, making it 21 years old in 2025.

What condition is Wilder Road over Nubanusit Brook 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 July 2023.

How much traffic does Wilder Road over Nubanusit Brook carry?

About 222 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Wilder Road over Nubanusit Brook?

The structure is 59 ft (18 m) long with a longest span of 55 ft (16.8 m) and a deck 28 ft wide.

Who owns Wilder Road over Nubanusit Brook?

It is owned by the City or Municipal Highway Agency.