Kent-Blk Diamond over BNSF RR
PoorKing County, Washington · At SE 291st · Structure no. 084811000000000
- Built
- 1931
- 94 years old, rebuilt 1968
- Condition
- Poor
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 103 ft
- 7 main spans
- Daily traffic
- 7,700
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Kent-Blk Diamond over BNSF RR is a wood or timber stringer/multi-beam or girder carrying Kent-Blk Diamond over BNSF RR in King County, Washington. It was built in 1931 and reconstructed in 1968, so it is 94 years old, older than the Washington average of 49.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 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 7,700 vehicles a day, roughly 10% of them trucks, projected to reach 11,000 by 2042. The structure is 103 ft (31.4 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Kent-Blk Diamond over BNSF RR built?
It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1968.
What condition is Kent-Blk Diamond over BNSF RR 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 March 2024.
How much traffic does Kent-Blk Diamond over BNSF RR carry?
About 7,700 vehicles per day (2022 count), of which roughly 10% are trucks.
How long is Kent-Blk Diamond over BNSF RR?
The structure is 103 ft (31.4 m) long with a longest span of 23 ft (7.1 m) and a deck 24 ft wide.
Who owns Kent-Blk Diamond over BNSF RR?
It is owned by the County Highway Agency.