Knapp Road over Coal Creek
FairLincoln County, Washington · 3.40 W SR 28 · Structure no. 081557000000000
- Built
- 1978
- 47 years old
- Condition
- Fair
- inspected November 2023
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 42 ft
- 1 main span
- Daily traffic
- 63
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
Knapp Road over Coal Creek is a prestressed concrete tee beam carrying Knapp Road over Coal Creek in Lincoln County, Washington. It was built in 1978, so it is 47 years old, younger than the Washington average of 49.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 63 vehicles a day, roughly 40% of them trucks, projected to reach 113 by 2042. The structure is 42 ft (12.8 m) long and 32 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Knapp Road over Coal Creek built?
It was built in 1978, making it 47 years old in 2025.
What condition is Knapp Road over Coal Creek 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 Knapp Road over Coal Creek carry?
About 63 vehicles per day (2021 count), of which roughly 40% are trucks.
How long is Knapp Road over Coal Creek?
The structure is 42 ft (12.8 m) long with a longest span of 39 ft (11.9 m) and a deck 32 ft wide.
Who owns Knapp Road over Coal Creek?
It is owned by the County Highway Agency.