US Bridges

Stage Road over Nighthawk Hollow Brook

Good

Belknap County, New Hampshire · Town Rd. · Structure no. 009201220004100

Built
2021
4 years old
Condition
Good
inspected August 2023
Type
Slab
Prestressed Concrete
Length
59 ft
1 main span
Daily traffic
1,167
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Stage Road over Nighthawk Hollow Brook is a prestressed concrete slab carrying Stage Road over Nighthawk Hollow Brook in Belknap County, New Hampshire. It was built in 2021, so it is 4 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,167 vehicles a day, roughly 4% of them trucks, projected to reach 1,727 by 2043. The structure is 59 ft (18 m) long and 29 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesStage Road
CrossesNighthawk Hollow Brook
LocationTown Rd.
CountyBelknap County
StateNew Hampshire
Coordinates43.40074, -71.30697
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating60.8 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length59 ft (18 m)
Longest span50 ft (15.2 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,167 (2023)
Projected traffic1,727 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Stage Road over Nighthawk Hollow Brook built?

It was built in 2021, making it 4 years old in 2025.

What condition is Stage Road over Nighthawk Hollow 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 August 2023.

How much traffic does Stage Road over Nighthawk Hollow Brook carry?

About 1,167 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Stage Road over Nighthawk Hollow Brook?

The structure is 59 ft (18 m) long with a longest span of 50 ft (15.2 m) and a deck 29 ft wide.

Who owns Stage Road over Nighthawk Hollow Brook?

It is owned by the City or Municipal Highway Agency.