I-393 US 4 US202 over I-93
PoorMerrimack County, New Hampshire · 0.4 Mi. E. JCT US 3 · Structure no. 005201520010800
- Built
- 1958
- 67 years old, rebuilt 1981
- Condition
- Poor
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 167 ft
- 2 main spans
- Daily traffic
- 22,391
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-393 US 4 US202 over I-93 is a steel stringer/multi-beam or girder carrying I-393 US 4 US202 over I-93 in Merrimack County, New Hampshire. It was built in 1958 and reconstructed in 1981, so it is 67 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 22,391 vehicles a day, roughly 8% of them trucks, projected to reach 33,138 by 2043. The structure is 167 ft (50.9 m) long and 92 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-393 US 4 US202 over I-93 built?
It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1981.
What condition is I-393 US 4 US202 over I-93 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-393 US 4 US202 over I-93 carry?
About 22,391 vehicles per day (2023 count), of which roughly 8% are trucks.
How long is I-393 US 4 US202 over I-93?
The structure is 167 ft (50.9 m) long with a longest span of 80 ft (24.4 m) and a deck 92 ft wide.
Who owns I-393 US 4 US202 over I-93?
It is owned by the State Highway Agency.