US 3 over Merrimack River
FairMerrimack County, New Hampshire · 0.1 MI East JCT I-93 · Structure no. 005201850010400
- Built
- 1998
- 27 years old
- Condition
- Fair
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 697 ft
- 5 main spans
- Daily traffic
- 26,707
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
US 3 over Merrimack River is a steel continuous stringer/multi-beam or girder carrying US 3 over Merrimack River in Merrimack County, New Hampshire. It was built in 1998, so it is 27 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 26,707 vehicles a day, roughly 5% of them trucks, projected to reach 39,526 by 2043. The structure is 697 ft (212.4 m) long and 95 ft wide. If it were closed, the detour would be 3.7 mi (6 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 3 over Merrimack River built?
It was built in 1998, making it 27 years old in 2025.
What condition is US 3 over Merrimack River in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2023.
How much traffic does US 3 over Merrimack River carry?
About 26,707 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is US 3 over Merrimack River?
The structure is 697 ft (212.4 m) long with a longest span of 150 ft (45.7 m) and a deck 95 ft wide.
Who owns US 3 over Merrimack River?
It is owned by the City or Municipal Highway Agency.