Grist Mill Hill RD over Indian River
PoorGrafton County, New Hampshire · 2.01 MI from Grafton Tl · Structure no. 003601720007000
- Built
- 1956
- 69 years old
- Condition
- Poor
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 51 ft
- 1 main span
- Daily traffic
- 365
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Grist Mill Hill RD over Indian River is a steel stringer/multi-beam or girder carrying Grist Mill Hill RD over Indian River in Grafton County, New Hampshire. It was built in 1956, so it is 69 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 poor condition with a lowest component rating of 3 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. Its operating status is: open, temporary structure in place while original is closed.
It carries about 365 vehicles a day, roughly 4% of them trucks, projected to reach 540 by 2043. The structure is 51 ft (15.5 m) long and 21 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 | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Grist Mill Hill RD over Indian River built?
It was built in 1956, making it 69 years old in 2025.
What condition is Grist Mill Hill RD over Indian 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 July 2024.
How much traffic does Grist Mill Hill RD over Indian River carry?
About 365 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is Grist Mill Hill RD over Indian River?
The structure is 51 ft (15.5 m) long with a longest span of 46 ft (14 m) and a deck 21 ft wide.
Who owns Grist Mill Hill RD over Indian River?
It is owned by the City or Municipal Highway Agency.