I-293 Nh 3A Tpk N over Black Brook
PoorHillsborough County, New Hampshire · 2.5 S Hooksett Tl · Structure no. 016100990006700
- Built
- 1956
- 69 years old
- Condition
- Poor
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 74 ft
- 1 main span
- Daily traffic
- 24,101
- 2023 count
- Owner
- Toll Authority
- State Toll Authority
About this bridge
I-293 Nh 3A Tpk N over Black Brook is a steel stringer/multi-beam or girder carrying I-293 Nh 3A Tpk N over Black Brook in Hillsborough County, New Hampshire. It was built in 1956, so it is 69 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 24,101 vehicles a day, roughly 6% of them trucks, projected to reach 35,669 by 2043. The structure is 74 ft (22.6 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-293 Nh 3A Tpk N over Black Brook built?
It was built in 1956, making it 69 years old in 2025.
What condition is I-293 Nh 3A Tpk N over Black Brook in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2024.
How much traffic does I-293 Nh 3A Tpk N over Black Brook carry?
About 24,101 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is I-293 Nh 3A Tpk N over Black Brook?
The structure is 74 ft (22.6 m) long with a longest span of 70 ft (21.3 m) and a deck 41 ft wide.
Who owns I-293 Nh 3A Tpk N over Black Brook?
It is owned by the State Toll Authority.