US Bridges

NH135 over Brook

Good

Coos County, New Hampshire · 1.8 MI Littleton Tl · Structure no. 005700820012100

Built
2024
1 years old
Condition
Good
inspected August 2024
Type
Truss - Thru
Steel
Length
99 ft
1 main span
Daily traffic
1,550
2023 count
Owner
State
State Highway Agency

About this bridge

NH135 over Brook is a steel truss - thru carrying NH135 over Brook in Coos County, New Hampshire. It was built in 2024, so it is 1 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: open, temporary structure in place while original is closed.

It carries about 1,550 vehicles a day, roughly 10% of them trucks, projected to reach 2,294 by 2043. The structure is 99 ft (30.3 m) long and 14 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesNH135
CrossesBrook
Location1.8 MI Littleton Tl
RouteState Highway 135
CountyCoos County
StateNew Hampshire
Coordinates44.40367, -71.73116
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, temporary structure in place while original is closed
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckSteel plate
Main spans1
Design loadHS 20
Structure length99 ft (30.3 m)
Longest span99 ft (30.3 m)
Deck width14 ft (4.2 m)
Roadway width13 ft (4.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,550 (2023)
Projected traffic2,294 by 2043
Trucks10%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 NH135 over Brook built?

It was built in 2024, making it 1 years old in 2025.

What condition is NH135 over 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 August 2024.

How much traffic does NH135 over Brook carry?

About 1,550 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is NH135 over Brook?

The structure is 99 ft (30.3 m) long with a longest span of 99 ft (30.3 m) and a deck 14 ft wide.

Who owns NH135 over Brook?

It is owned by the State Highway Agency.