US Bridges

Main Street over Baker River

Good

Grafton County, New Hampshire · 0.4 MI N JCT RTE 25 · Structure no. 022501320007000

Built
1998
27 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
160 ft
1 main span
Daily traffic
1,635
2023 count
Owner
State
State Highway Agency

About this bridge

Main Street over Baker River is a steel stringer/multi-beam or girder carrying Main Street over Baker River in Grafton County, New Hampshire. It was built in 1998, so it is 27 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 1,635 vehicles a day, roughly 6% of them trucks, projected to reach 2,419 by 2043. The structure is 160 ft (48.8 m) long and 38 ft wide.

CarriesMain Street
CrossesBaker River
Location0.4 MI N JCT RTE 25
RouteState Highway 0
Coordinates43.80108, -71.81421
Functional classRural Minor Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
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 alignment8: Equal to present desirable criteria
Operating rating77.6 US tons
Inventory rating46.5 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length160 ft (48.8 m)
Longest span155 ft (47.2 m)
Deck width38 ft (11.6 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,635 (2023)
Projected traffic2,419 by 2043
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
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 Main Street over Baker River built?

It was built in 1998, making it 27 years old in 2025.

What condition is Main Street over Baker 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 April 2024.

How much traffic does Main Street over Baker River carry?

About 1,635 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Main Street over Baker River?

The structure is 160 ft (48.8 m) long with a longest span of 155 ft (47.2 m) and a deck 38 ft wide.

Who owns Main Street over Baker River?

It is owned by the State Highway Agency.