I-93 NB over Bay Street
GoodMerrimack County, New Hampshire · 1.7 MI S. Tilton Tl · Structure no. 019601090014000
- Built
- 1960
- 65 years old, rebuilt 1985
- Condition
- Good
- inspected June 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 101 ft
- 3 main spans
- Daily traffic
- 15,544
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-93 NB over Bay Street is a steel stringer/multi-beam or girder carrying I-93 NB over Bay Street in Merrimack County, New Hampshire. It was built in 1960 and reconstructed in 1985, so it is 65 years old, older 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 15,544 vehicles a day, roughly 9% of them trucks, projected to reach 23,005 by 2043. The structure is 101 ft (30.8 m) long and 44 ft wide. If it were closed, the detour would be 14.3 mi (23 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-93 NB over Bay Street built?
It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1985.
What condition is I-93 NB over Bay Street 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 2023.
How much traffic does I-93 NB over Bay Street carry?
About 15,544 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is I-93 NB over Bay Street?
The structure is 101 ft (30.8 m) long with a longest span of 37 ft (11.3 m) and a deck 44 ft wide.
Who owns I-93 NB over Bay Street?
It is owned by the State Highway Agency.