I-93 SB over Nh 3A
GoodMerrimack County, New Hampshire · 1.0 MI N Manchester Cl · Structure no. 012800750007900
- Built
- 1976
- 49 years old, rebuilt 2012
- Condition
- Good
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 140 ft
- 1 main span
- Daily traffic
- 29,141
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-93 SB over Nh 3A is a steel stringer/multi-beam or girder carrying I-93 SB over Nh 3A in Merrimack County, New Hampshire. It was built in 1976 and reconstructed in 2012, 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 29,141 vehicles a day, roughly 6% of them trucks, projected to reach 43,128 by 2043. The structure is 140 ft (42.7 m) long and 75 ft wide. If it were closed, the detour would be 1.2 mi (2 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 SB over Nh 3A built?
It was built in 1976, making it 49 years old in 2025. It was reconstructed in 2012.
What condition is I-93 SB over Nh 3A 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 I-93 SB over Nh 3A carry?
About 29,141 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is I-93 SB over Nh 3A?
The structure is 140 ft (42.7 m) long with a longest span of 134 ft (40.8 m) and a deck 75 ft wide.
Who owns I-93 SB over Nh 3A?
It is owned by the State Highway Agency.