US Bridges

NH135 over Johns River

Good

Coos County, New Hampshire · 4.8 MI from Littleton Tl · Structure no. 005701340015300

Built
1997
28 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
85 ft
1 main span
Daily traffic
946
2023 count
Owner
State
State Highway Agency

About this bridge

NH135 over Johns River is a prestressed concrete stringer/multi-beam or girder carrying NH135 over Johns River in Coos County, New Hampshire. It was built in 1997, so it is 28 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.

It carries about 946 vehicles a day, roughly 7% of them trucks, projected to reach 1,400 by 2043. The structure is 85 ft (25.9 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesNH135
CrossesJohns River
Location4.8 MI from Littleton Tl
RouteState Highway 135
Coordinates44.42647, -71.67608
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 protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating110.1 US tons
Inventory rating61 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length85 ft (25.9 m)
Longest span83 ft (25.3 m)
Deck width33 ft (10 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic946 (2023)
Projected traffic1,400 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Johns River built?

It was built in 1997, making it 28 years old in 2025.

What condition is NH135 over Johns River 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 NH135 over Johns River carry?

About 946 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is NH135 over Johns River?

The structure is 85 ft (25.9 m) long with a longest span of 83 ft (25.3 m) and a deck 33 ft wide.

Who owns NH135 over Johns River?

It is owned by the State Highway Agency.