US Bridges

Yeaton Road over Spencer Brook

Fair

Grafton County, New Hampshire · 0.9 MI N JCT Nh 3-A · Structure no. 021600760013600

Built
1919
106 years old, rebuilt 1981
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
24 ft
1 main span
Daily traffic
313
2023 count
Owner
State
State Highway Agency

About this bridge

Yeaton Road over Spencer Brook is a steel stringer/multi-beam or girder carrying Yeaton Road over Spencer Brook in Grafton County, New Hampshire. It was built in 1919 and reconstructed in 1981, so it is 106 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 313 vehicles a day, roughly 4% of them trucks, projected to reach 463 by 2043. The structure is 24 ft (7.3 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesYeaton Road
CrossesSpencer Brook
Location0.9 MI N JCT Nh 3-A
RouteState Highway 0
Coordinates43.76524, -71.75238
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.8 US tons
Inventory rating27 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span21 ft (6.4 m)
Deck width27 ft (8.2 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic313 (2023)
Projected traffic463 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Yeaton Road over Spencer Brook built?

It was built in 1919, making it 106 years old in 2025. It was reconstructed in 1981.

What condition is Yeaton Road over Spencer Brook 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 April 2023.

How much traffic does Yeaton Road over Spencer Brook carry?

About 313 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Yeaton Road over Spencer Brook?

The structure is 24 ft (7.3 m) long with a longest span of 21 ft (6.4 m) and a deck 27 ft wide.

Who owns Yeaton Road over Spencer Brook?

It is owned by the State Highway Agency.