Old HWY 10 W over Williams Coulee 007
PoorPrairie County, Montana · 13M SW Terry · Structure no. L40004000+01001
- Built
- 1930
- 95 years old, rebuilt 1948
- Condition
- Poor
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 77 ft
- 4 main spans
- Daily traffic
- 507
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Old HWY 10 W over Williams Coulee 007 is a wood or timber stringer/multi-beam or girder carrying Old HWY 10 W over Williams Coulee 007 in Prairie County, Montana. It was built in 1930 and reconstructed in 1948, so it is 95 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 77 ft (23.6 m) long and 32 ft wide. If it were closed, the detour would be 28 mi (45 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 Old HWY 10 W over Williams Coulee 007 built?
It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1948.
What condition is Old HWY 10 W over Williams Coulee 007 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 Old HWY 10 W over Williams Coulee 007 carry?
About 507 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is Old HWY 10 W over Williams Coulee 007?
The structure is 77 ft (23.6 m) long with a longest span of 19 ft (5.8 m) and a deck 32 ft wide.
Who owns Old HWY 10 W over Williams Coulee 007?
It is owned by the State Highway Agency.