US Bridges

Roberts Road over Snow Brook

Good

Carroll County, New Hampshire · Town RD · Structure no. 007300780011400

Built
2016
9 years old
Condition
Good
inspected September 2023
Type
Culvert
Concrete
Length
29 ft
1 main span
Daily traffic
96
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Roberts Road over Snow Brook is a concrete culvert carrying Roberts Road over Snow Brook in Carroll County, New Hampshire. It was built in 2016, so it is 9 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, roughly 4% of them trucks, projected to reach 142 by 2043. The structure is 29 ft (8.9 m) long and 21 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesRoberts Road
CrossesSnow Brook
LocationTown RD
CountyCarroll County
StateNew Hampshire
Coordinates43.91378, -71.05941
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert9 ExcellentNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating63.4 US tons
Inventory rating49.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length29 ft (8.9 m)
Longest span27 ft (8.2 m)
Deck width21 ft (6.4 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic96 (2023)
Projected traffic142 by 2043
Trucks4%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 Roberts Road over Snow Brook built?

It was built in 2016, making it 9 years old in 2025.

What condition is Roberts Road over Snow 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 September 2023.

How much traffic does Roberts Road over Snow Brook carry?

About 96 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Roberts Road over Snow Brook?

The structure is 29 ft (8.9 m) long with a longest span of 27 ft (8.2 m) and a deck 21 ft wide.

Who owns Roberts Road over Snow Brook?

It is owned by the City or Municipal Highway Agency.