Lawrence Road over Blackwater River
FairMerrimack County, New Hampshire · 0.3 MI Nh 11 · Structure no. 000800980009300
- Built
- 1930
- 95 years old, rebuilt 1972
- Condition
- Fair
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 58 ft
- 1 main span
- Daily traffic
- 501
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Lawrence Road over Blackwater River is a steel stringer/multi-beam or girder carrying Lawrence Road over Blackwater River in Merrimack County, New Hampshire. It was built in 1930 and reconstructed in 1972, so it is 95 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 5 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 501 vehicles a day, roughly 4% of them trucks, projected to reach 741 by 2043. The structure is 58 ft (17.7 m) long and 20 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Lawrence Road over Blackwater River built?
It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1972.
What condition is Lawrence Road over Blackwater 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 October 2024.
How much traffic does Lawrence Road over Blackwater River carry?
About 501 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is Lawrence Road over Blackwater River?
The structure is 58 ft (17.7 m) long with a longest span of 48 ft (14.6 m) and a deck 20 ft wide.
Who owns Lawrence Road over Blackwater River?
It is owned by the City or Municipal Highway Agency.