US Bridges

Collins Brook Road over Collins Brook

Good

Rockingham County, New Hampshire · 0.3 MI from Nh RTE 111 · Structure no. 028001070008700

Built
1989
36 years old
Condition
Good
inspected June 2023
Type
Frame
Concrete
Length
24 ft
3 main spans
Daily traffic
511
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Collins Brook Road over Collins Brook is a concrete frame carrying Collins Brook Road over Collins Brook in Rockingham County, New Hampshire. It was built in 1989, so it is 36 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 511 vehicles a day, projected to reach 756 by 2043. The structure is 24 ft (7.2 m) long and 30 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesCollins Brook Road
CrossesCollins Brook
Location0.3 MI from Nh RTE 111
CountyRockingham County
StateNew Hampshire
Coordinates42.79908, -71.30277
Functional classUrban Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating28.4 US tons
Inventory rating17.1 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length24 ft (7.2 m)
Longest span8 ft (2.4 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic511 (2023)
Projected traffic756 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 Collins Brook Road over Collins Brook built?

It was built in 1989, making it 36 years old in 2025.

What condition is Collins Brook Road over Collins 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 June 2023.

How much traffic does Collins Brook Road over Collins Brook carry?

About 511 vehicles per day (2023 count).

How long is Collins Brook Road over Collins Brook?

The structure is 24 ft (7.2 m) long with a longest span of 8 ft (2.4 m) and a deck 30 ft wide.

Who owns Collins Brook Road over Collins Brook?

It is owned by the City or Municipal Highway Agency.