US Bridges

Winter Street over Squam River

Fair

Grafton County, New Hampshire · 0.2 MI FR Nh RTE 25 · Structure no. 001100950005700

Built
1941
84 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
34 ft
1 main span
Daily traffic
796
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Winter Street over Squam River is a steel stringer/multi-beam or girder carrying Winter Street over Squam River in Grafton County, New Hampshire. It was built in 1941, so it is 84 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 796 vehicles a day, roughly 4% of them trucks, projected to reach 1,178 by 2043. The structure is 34 ft (10.4 m) long and 26 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesWinter Street
CrossesSquam River
Location0.2 MI FR Nh RTE 25
Coordinates43.69239, -71.63446
Functional classUrban 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be 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 rating22 US tons
Inventory rating15 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length34 ft (10.4 m)
Longest span29 ft (8.8 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic796 (2023)
Projected traffic1,178 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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Winter Street over Squam River built?

It was built in 1941, making it 84 years old in 2025.

What condition is Winter Street over Squam 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 September 2024.

How much traffic does Winter Street over Squam River carry?

About 796 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Winter Street over Squam River?

The structure is 34 ft (10.4 m) long with a longest span of 29 ft (8.8 m) and a deck 26 ft wide.

Who owns Winter Street over Squam River?

It is owned by the City or Municipal Highway Agency.