Main Street over Merrimack River CSX RD
GoodMerrimack County, New Hampshire · 0.7 MI N JCT US 3 · Structure no. 012800800014800
- Built
- 1976
- 49 years old
- Condition
- Good
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 675 ft
- 5 main spans
- Daily traffic
- 15,760
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Main Street over Merrimack River CSX RD is a steel continuous stringer/multi-beam or girder carrying Main Street over Merrimack River CSX RD in Merrimack County, New Hampshire. It was built in 1976, so it is 49 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 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 15,760 vehicles a day, roughly 4% of them trucks, projected to reach 23,324 by 2043. The structure is 675 ft (205.7 m) long and 42 ft wide. If it were closed, the detour would be 11.8 mi (19 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Main Street over Merrimack River CSX RD built?
It was built in 1976, making it 49 years old in 2025.
What condition is Main Street over Merrimack River CSX RD 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 June 2024.
How much traffic does Main Street over Merrimack River CSX RD carry?
About 15,760 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is Main Street over Merrimack River CSX RD?
The structure is 675 ft (205.7 m) long with a longest span of 175 ft (53.3 m) and a deck 42 ft wide.
Who owns Main Street over Merrimack River CSX RD?
It is owned by the State Highway Agency.