US Bridges

Washington Street over Cocheco River

Good

Strafford County, New Hampshire · 0.1 MI S Nh 9 · Structure no. 006501360012300

Built
2010
15 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
165 ft
1 main span
Daily traffic
552
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Washington Street over Cocheco River is a steel stringer/multi-beam or girder carrying Washington Street over Cocheco River in Strafford County, New Hampshire. It was built in 2010, so it is 15 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 552 vehicles a day, projected to reach 816 by 2043. The structure is 165 ft (50.3 m) long and 43 ft wide.

CarriesWashington Street
CrossesCocheco River
Location0.1 MI S Nh 9
Coordinates43.19533, -70.87021
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.1 US tons
Inventory rating50.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length165 ft (50.3 m)
Longest span160 ft (48.8 m)
Deck width43 ft (13.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic552 (2023)
Projected traffic816 by 2043
Trucks0%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Washington Street over Cocheco River built?

It was built in 2010, making it 15 years old in 2025.

What condition is Washington Street over Cocheco 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 September 2024.

How much traffic does Washington Street over Cocheco River carry?

About 552 vehicles per day (2023 count).

How long is Washington Street over Cocheco River?

The structure is 165 ft (50.3 m) long with a longest span of 160 ft (48.8 m) and a deck 43 ft wide.

Who owns Washington Street over Cocheco River?

It is owned by the City or Municipal Highway Agency.