Circumferential EB over Merrimack River CSX
GoodHillsborough County, New Hampshire · Nashua-Hudson Tl · Structure no. 017701570005800
- Built
- 2000
- 25 years old
- Condition
- Good
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 741 ft
- 4 main spans
- Daily traffic
- 43,572
- 2023 count
- Owner
- Toll Authority
- State Toll Authority
About this bridge
Circumferential EB over Merrimack River CSX is a steel continuous stringer/multi-beam or girder carrying Circumferential EB over Merrimack River CSX in Hillsborough County, New Hampshire. It was built in 2000, so it is 25 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 43,572 vehicles a day, roughly 5% of them trucks, projected to reach 64,486 by 2043. The structure is 741 ft (225.9 m) long and 85 ft wide. If it were closed, the detour would be 6.8 mi (11 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Circumferential EB over Merrimack River CSX built?
It was built in 2000, making it 25 years old in 2025.
What condition is Circumferential EB over Merrimack River CSX 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 April 2024.
How much traffic does Circumferential EB over Merrimack River CSX carry?
About 43,572 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is Circumferential EB over Merrimack River CSX?
The structure is 741 ft (225.9 m) long with a longest span of 216 ft (65.8 m) and a deck 85 ft wide.
Who owns Circumferential EB over Merrimack River CSX?
It is owned by the State Toll Authority.