South Road over I-89
FairMerrimack County, New Hampshire · .8 MI E of JCT US 202 · Structure no. 012901230007700
- Built
- 1959
- 66 years old, rebuilt 1991
- Condition
- Fair
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 189 ft
- 4 main spans
- Daily traffic
- 96
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
South Road over I-89 is a steel continuous stringer/multi-beam or girder carrying South Road over I-89 in Merrimack County, New Hampshire. It was built in 1959 and reconstructed in 1991, so it is 66 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 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 96 vehicles a day, roughly 4% of them trucks, projected to reach 142 by 2043. The structure is 189 ft (57.6 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 South Road over I-89 built?
It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1991.
What condition is South Road over I-89 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 May 2024.
How much traffic does South Road over I-89 carry?
About 96 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is South Road over I-89?
The structure is 189 ft (57.6 m) long with a longest span of 57 ft (17.4 m) and a deck 31 ft wide.
Who owns South Road over I-89?
It is owned by the State Highway Agency.