US Bridges

Quincy Road over Stinson Brook

Good

Grafton County, New Hampshire · 2.9 Mi. N. of Plymouth Tl · Structure no. 022501380007500

Built
1937
88 years old, rebuilt 2012
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
46 ft
1 main span
Daily traffic
938
2023 count
Owner
State
State Highway Agency

About this bridge

Quincy Road over Stinson Brook is a steel stringer/multi-beam or girder carrying Quincy Road over Stinson Brook in Grafton County, New Hampshire. It was built in 1937 and reconstructed in 2012, so it is 88 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 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 938 vehicles a day, roughly 10% of them trucks, projected to reach 1,388 by 2043. The structure is 46 ft (14 m) long and 32 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesQuincy Road
CrossesStinson Brook
Location2.9 Mi. N. of Plymouth Tl
RouteState Highway 0
CountyGrafton County
StateNew Hampshire
Coordinates43.80512, -71.80914
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating79.4 US tons
Inventory rating47.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length46 ft (14 m)
Longest span40 ft (12.2 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic938 (2023)
Projected traffic1,388 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 Quincy Road over Stinson Brook built?

It was built in 1937, making it 88 years old in 2025. It was reconstructed in 2012.

What condition is Quincy Road over Stinson 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 April 2024.

How much traffic does Quincy Road over Stinson Brook carry?

About 938 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Quincy Road over Stinson Brook?

The structure is 46 ft (14 m) long with a longest span of 40 ft (12.2 m) and a deck 32 ft wide.

Who owns Quincy Road over Stinson Brook?

It is owned by the State Highway Agency.