Road 100 S over Big Sandy Creek 019
FairHill County, Montana · 10M N Box Elder · Structure no. L21431001+08001
- Built
- 1963
- 62 years old
- Condition
- Fair
- inspected November 2023
- Type
- Channel Beam
- Prestressed Concrete
- Length
- 25 ft
- 1 main span
- Daily traffic
- 29
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Road 100 S over Big Sandy Creek 019 is a prestressed concrete channel beam carrying Road 100 S over Big Sandy Creek 019 in Hill County, Montana. It was built in 1963, so it is 62 years old, older than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 29 vehicles a day, roughly 3% of them trucks, projected to reach 31 by 2043. The structure is 25 ft (7.6 m) long and 26 ft wide. If it were closed, the detour would be 14.9 mi (24 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| 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 Road 100 S over Big Sandy Creek 019 built?
It was built in 1963, making it 62 years old in 2025.
What condition is Road 100 S over Big Sandy Creek 019 in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2023.
How much traffic does Road 100 S over Big Sandy Creek 019 carry?
About 29 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is Road 100 S over Big Sandy Creek 019?
The structure is 25 ft (7.6 m) long with a longest span of 24 ft (7.3 m) and a deck 26 ft wide.
Who owns Road 100 S over Big Sandy Creek 019?
It is owned by the County Highway Agency.