Monster Road SW over Black River Channel
FairKing County, Washington · 0.6 MI S JCT SR-900 · Structure no. 085182000000000
- Built
- 1998
- 27 years old, rebuilt 2005
- Condition
- Fair
- inspected May 2024
- Type
- Tee Beam
- Prestressed Concrete Continuous
- Length
- 188 ft
- 3 main spans
- Daily traffic
- 10,670
- 2020 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Monster Road SW over Black River Channel is a prestressed concrete continuous tee beam carrying Monster Road SW over Black River Channel in King County, Washington. It was built in 1998 and reconstructed in 2005, so it is 27 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 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 10,670 vehicles a day, roughly 13% of them trucks, projected to reach 11,900 by 2037. The structure is 188 ft (57.3 m) long and 47 ft wide. If it were closed, the detour would be 5 mi (8 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Monster Road SW over Black River Channel built?
It was built in 1998, making it 27 years old in 2025. It was reconstructed in 2005.
What condition is Monster Road SW over Black River Channel 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 May 2024.
How much traffic does Monster Road SW over Black River Channel carry?
About 10,670 vehicles per day (2020 count), of which roughly 13% are trucks.
How long is Monster Road SW over Black River Channel?
The structure is 188 ft (57.3 m) long with a longest span of 95 ft (29 m) and a deck 47 ft wide.
Who owns Monster Road SW over Black River Channel?
It is owned by the City or Municipal Highway Agency.