Nh 49 over Mad River
PoorGrafton County, New Hampshire · 1.9 MI SW Waterville T L · Structure no. 025402390015200
- Built
- 1979
- 46 years old
- Condition
- Poor
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 540 ft
- 5 main spans
- Daily traffic
- 2,828
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Nh 49 over Mad River is a steel continuous stringer/multi-beam or girder carrying Nh 49 over Mad River in Grafton County, New Hampshire. It was built in 1979, so it is 46 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 2,828 vehicles a day, roughly 4% of them trucks, projected to reach 4,185 by 2043. The structure is 540 ft (164.6 m) long and 39 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Nh 49 over Mad River built?
It was built in 1979, making it 46 years old in 2025.
What condition is Nh 49 over Mad River in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2024.
How much traffic does Nh 49 over Mad River carry?
About 2,828 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is Nh 49 over Mad River?
The structure is 540 ft (164.6 m) long with a longest span of 130 ft (39.6 m) and a deck 39 ft wide.
Who owns Nh 49 over Mad River?
It is owned by the State Highway Agency.