Main Street over Mascoma Lake
GoodGrafton County, New Hampshire · .13 Mi. from JCT RTE 4-A · Structure no. 007700780013900
- Built
- 2012
- 13 years old
- Condition
- Good
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 345 ft
- 3 main spans
- Daily traffic
- 1,358
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Main Street over Mascoma Lake is a steel stringer/multi-beam or girder carrying Main Street over Mascoma Lake in Grafton County, New Hampshire. It was built in 2012, so it is 13 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 1,358 vehicles a day, roughly 10% of them trucks, projected to reach 2,009 by 2043. The structure is 345 ft (105.2 m) long and 38 ft wide. If it were closed, the detour would be 5 mi (8 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 | 8 Very Good | No problems noted. |
| Superstructure | 9 Excellent | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Main Street over Mascoma Lake built?
It was built in 2012, making it 13 years old in 2025.
What condition is Main Street over Mascoma Lake 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 May 2023.
How much traffic does Main Street over Mascoma Lake carry?
About 1,358 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is Main Street over Mascoma Lake?
The structure is 345 ft (105.2 m) long with a longest span of 130 ft (39.6 m) and a deck 38 ft wide.
Who owns Main Street over Mascoma Lake?
It is owned by the State Highway Agency.