US Bridges

NH118 over Baker River

Fair

Grafton County, New Hampshire · 0.9 MI from JCT RTE 25 · Structure no. 026401330010300

Built
1947
78 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
77 ft
1 main span
Daily traffic
1,732
2023 count
Owner
State
State Highway Agency

About this bridge

NH118 over Baker River is a steel stringer/multi-beam or girder carrying NH118 over Baker River in Grafton County, New Hampshire. It was built in 1947, so it is 78 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 5 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 1,732 vehicles a day, roughly 4% of them trucks, projected to reach 2,563 by 2043. The structure is 77 ft (23.5 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNH118
CrossesBaker River
Location0.9 MI from JCT RTE 25
RouteState Highway 118
CountyGrafton County
StateNew Hampshire
Coordinates43.93972, -71.87381
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39 US tons
Inventory rating23 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length77 ft (23.5 m)
Longest span70 ft (21.3 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,732 (2023)
Projected traffic2,563 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 NH118 over Baker River built?

It was built in 1947, making it 78 years old in 2025.

What condition is NH118 over Baker River 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 March 2024.

How much traffic does NH118 over Baker River carry?

About 1,732 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is NH118 over Baker River?

The structure is 77 ft (23.5 m) long with a longest span of 70 ft (21.3 m) and a deck 28 ft wide.

Who owns NH118 over Baker River?

It is owned by the State Highway Agency.