Blackwater Road over Mascoma River
GoodGrafton County, New Hampshire · 0.8 MI US 4 · Structure no. 003600910003000
- Built
- 1992
- 33 years old
- Condition
- Good
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 103 ft
- 1 main span
- Daily traffic
- 510
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Blackwater Road over Mascoma River is a steel stringer/multi-beam or girder carrying Blackwater Road over Mascoma River in Grafton County, New Hampshire. It was built in 1992, so it is 33 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 510 vehicles a day, roughly 4% of them trucks, projected to reach 754 by 2043. The structure is 103 ft (31.4 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| 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 Blackwater Road over Mascoma River built?
It was built in 1992, making it 33 years old in 2025.
What condition is Blackwater Road over Mascoma River in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.
How much traffic does Blackwater Road over Mascoma River carry?
About 510 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is Blackwater Road over Mascoma River?
The structure is 103 ft (31.4 m) long with a longest span of 100 ft (30.5 m) and a deck 31 ft wide.
Who owns Blackwater Road over Mascoma River?
It is owned by the City or Municipal Highway Agency.