US Bridges

Chapman Road over Patterson Brook

Good

Belknap County, New Hampshire · 1 MI West US 3 · Structure no. 023102190007200

Built
2019
6 years old
Condition
Good
inspected October 2023
Type
Slab
Concrete
Length
36 ft
1 main span
Daily traffic
96
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Chapman Road over Patterson Brook is a concrete slab carrying Chapman Road over Patterson Brook in Belknap County, New Hampshire. It was built in 2019, so it is 6 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 96 vehicles a day, projected to reach 142 by 2043. The structure is 36 ft (11 m) long and 36 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesChapman Road
CrossesPatterson Brook
Location1 MI West US 3
CountyBelknap County
StateNew Hampshire
Coordinates43.50053, -71.5237
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 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 adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating56 US tons
Inventory rating43.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length36 ft (11 m)
Longest span30 ft (9.1 m)
Deck width36 ft (11 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic96 (2023)
Projected traffic142 by 2043
Trucks0%
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 Chapman Road over Patterson Brook built?

It was built in 2019, making it 6 years old in 2025.

What condition is Chapman Road over Patterson 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 October 2023.

How much traffic does Chapman Road over Patterson Brook carry?

About 96 vehicles per day (2023 count).

How long is Chapman Road over Patterson Brook?

The structure is 36 ft (11 m) long with a longest span of 30 ft (9.1 m) and a deck 36 ft wide.

Who owns Chapman Road over Patterson Brook?

It is owned by the City or Municipal Highway Agency.