US Bridges

Henry Bridge Road over Harry Brook

Good

Hillsborough County, New Hampshire · Town RD · Structure no. 009501370010700

Built
2008
17 years old
Condition
Good
inspected July 2023
Type
Frame
Concrete
Length
23 ft
1 main span
Daily traffic
6,880
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Henry Bridge Road over Harry Brook is a concrete frame carrying Henry Bridge Road over Harry Brook in Hillsborough County, New Hampshire. It was built in 2008, so it is 17 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 6,880 vehicles a day, roughly 4% of them trucks, projected to reach 10,182 by 2043. The structure is 23 ft (7 m) long and 33 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesHenry Bridge Road
CrossesHarry Brook
LocationTown RD
CountyHillsborough County
StateNew Hampshire
Coordinates43.0184, -71.54815
Functional classRural Major Collector

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 protection7 GoodSome minor problems.
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating83.9 US tons
Inventory rating50.3 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length23 ft (7 m)
Longest span21 ft (6.4 m)
Deck width33 ft (10.1 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,880 (2023)
Projected traffic10,182 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Henry Bridge Road over Harry Brook built?

It was built in 2008, making it 17 years old in 2025.

What condition is Henry Bridge Road over Harry 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 Henry Bridge Road over Harry Brook carry?

About 6,880 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Henry Bridge Road over Harry Brook?

The structure is 23 ft (7 m) long with a longest span of 21 ft (6.4 m) and a deck 33 ft wide.

Who owns Henry Bridge Road over Harry Brook?

It is owned by the City or Municipal Highway Agency.