Frntage Road 81020 over Cottonwood Creek 083
PoorCuster County, Montana · 19M NE Miles City · Structure no. L09004003+01001
- Built
- 1928
- 97 years old, rebuilt 1948
- Condition
- Poor
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 173 ft
- 9 main spans
- Daily traffic
- 507
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Frntage Road 81020 over Cottonwood Creek 083 is a wood or timber stringer/multi-beam or girder carrying Frntage Road 81020 over Cottonwood Creek 083 in Custer County, Montana. It was built in 1928 and reconstructed in 1948, so it is 97 years old, older than the Montana average of 47 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 507 vehicles a day, roughly 3% of them trucks, projected to reach 540 by 2043. The structure is 173 ft (52.6 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 7 Good | Some minor problems. |
| 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 Frntage Road 81020 over Cottonwood Creek 083 built?
It was built in 1928, making it 97 years old in 2025. It was reconstructed in 1948.
What condition is Frntage Road 81020 over Cottonwood Creek 083 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 September 2024.
How much traffic does Frntage Road 81020 over Cottonwood Creek 083 carry?
About 507 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is Frntage Road 81020 over Cottonwood Creek 083?
The structure is 173 ft (52.6 m) long with a longest span of 19 ft (5.8 m) and a deck 32 ft wide.
Who owns Frntage Road 81020 over Cottonwood Creek 083?
It is owned by the State Highway Agency.