US Bridges

Washington Street over Canal Inlet

Fair

Merrimack County, New Hampshire · 0.6 MI FR US 3 · Structure no. 005200480008200

Built
1975
50 years old, rebuilt 2021
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
76 ft
1 main span
Daily traffic
2,533
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Washington Street over Canal Inlet is a steel stringer/multi-beam or girder carrying Washington Street over Canal Inlet in Merrimack County, New Hampshire. It was built in 1975 and reconstructed in 2021, so it is 50 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 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 2,533 vehicles a day, roughly 4% of them trucks, projected to reach 3,748 by 2043. The structure is 76 ft (23.2 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesWashington Street
CrossesCanal Inlet
Location0.6 MI FR US 3
RouteCity Street 0
Coordinates43.27278, -71.60566
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92.7 US tons
Inventory rating55.6 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span69 ft (21 m)
Deck width34 ft (10.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,533 (2023)
Projected traffic3,748 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 Washington Street over Canal Inlet built?

It was built in 1975, making it 50 years old in 2025. It was reconstructed in 2021.

What condition is Washington Street over Canal Inlet 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 July 2023.

How much traffic does Washington Street over Canal Inlet carry?

About 2,533 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Washington Street over Canal Inlet?

The structure is 76 ft (23.2 m) long with a longest span of 69 ft (21 m) and a deck 34 ft wide.

Who owns Washington Street over Canal Inlet?

It is owned by the City or Municipal Highway Agency.