US Bridges

NH110 over Roaring Brook

Fair

Coos County, New Hampshire · 2.4 MI from Stark Tl · Structure no. 019801040012000

Built
1962
63 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete
Length
34 ft
1 main span
Daily traffic
2,294
2023 count
Owner
State
State Highway Agency

About this bridge

NH110 over Roaring Brook is a concrete culvert carrying NH110 over Roaring Brook in Coos County, New Hampshire. It was built in 1962, so it is 63 years old, older than the New Hampshire average of 56.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,294 vehicles a day, roughly 4% of them trucks, projected to reach 3,395 by 2043. The structure is 34 ft (10.4 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesNH110
CrossesRoaring Brook
Location2.4 MI from Stark Tl
RouteState Highway 110
CountyCoos County
StateNew Hampshire
Coordinates44.59587, -71.50764
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.8 US tons
Inventory rating40 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span34 ft (10.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,294 (2023)
Projected traffic3,395 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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
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 NH110 over Roaring Brook built?

It was built in 1962, making it 63 years old in 2025.

What condition is NH110 over Roaring Brook in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2024.

How much traffic does NH110 over Roaring Brook carry?

About 2,294 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is NH110 over Roaring Brook?

The structure is 34 ft (10.4 m) long with a longest span of 34 ft (10.4 m).

Who owns NH110 over Roaring Brook?

It is owned by the State Highway Agency.