Salmon Street WB over Merrimack River CSX RD
FairHillsborough County, New Hampshire · .3MI W JCT US 3 · Structure no. 016101060007200
- Built
- 1970
- 55 years old, rebuilt 1999
- Condition
- Fair
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 858 ft
- 4 main spans
- Daily traffic
- 17,799
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Salmon Street WB over Merrimack River CSX RD is a steel continuous stringer/multi-beam or girder carrying Salmon Street WB over Merrimack River CSX RD in Hillsborough County, New Hampshire. It was built in 1970 and reconstructed in 1999, so it is 55 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 17,799 vehicles a day, roughly 5% of them trucks, projected to reach 26,342 by 2043. The structure is 858 ft (261.5 m) long and 37 ft wide. If it were closed, the detour would be 6.8 mi (11 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Salmon Street WB over Merrimack River CSX RD built?
It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1999.
What condition is Salmon Street WB over Merrimack River CSX RD 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 2024.
How much traffic does Salmon Street WB over Merrimack River CSX RD carry?
About 17,799 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is Salmon Street WB over Merrimack River CSX RD?
The structure is 858 ft (261.5 m) long with a longest span of 165 ft (50.3 m) and a deck 37 ft wide.
Who owns Salmon Street WB over Merrimack River CSX RD?
It is owned by the City or Municipal Highway Agency.