Johnson Hill Road over West Branch Brook
PoorMerrimack County, New Hampshire · 1.5 MI Marshall Hill RD · Structure no. 002801040014100
- Built
- 1950
- 75 years old
- Condition
- Poor
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 27 ft
- 1 main span
- Daily traffic
- 96
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Johnson Hill Road over West Branch Brook is a steel stringer/multi-beam or girder carrying Johnson Hill Road over West Branch Brook in Merrimack County, New Hampshire. It was built in 1950, so it is 75 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 2 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, would be posted or closed except for temporary shoring.
It carries about 96 vehicles a day, projected to reach 142 by 2043. The structure is 27 ft (8.2 m) long and 12 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 | 2 Critical | Advanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Johnson Hill Road over West Branch Brook built?
It was built in 1950, making it 75 years old in 2025.
What condition is Johnson Hill Road over West Branch Brook 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 October 2024.
How much traffic does Johnson Hill Road over West Branch Brook carry?
About 96 vehicles per day (2023 count).
How long is Johnson Hill Road over West Branch Brook?
The structure is 27 ft (8.2 m) long with a longest span of 22 ft (6.7 m) and a deck 12 ft wide.
Who owns Johnson Hill Road over West Branch Brook?
It is owned by the City or Municipal Highway Agency.