Mud Bay Road over Mud Bay
GoodThurston County, Washington · 0.20 E JCT SR101 · Structure no. 082314000000000
- Built
- 1978
- 47 years old
- Condition
- Good
- inspected July 2024
- Type
- Slab
- Concrete Continuous
- Length
- 208 ft
- 7 main spans
- Daily traffic
- 12,249
- 2020 count
- Owner
- County
- County Highway Agency
About this bridge
Mud Bay Road over Mud Bay is a concrete continuous slab carrying Mud Bay Road over Mud Bay in Thurston 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 12,249 vehicles a day, roughly 15% of them trucks, projected to reach 18,937 by 2042. The structure is 208 ft (63.4 m) long and 46 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mud Bay Road over Mud Bay built?
It was built in 1978, making it 47 years old in 2025.
What condition is Mud Bay Road over Mud Bay in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.
How much traffic does Mud Bay Road over Mud Bay carry?
About 12,249 vehicles per day (2020 count), of which roughly 15% are trucks.
How long is Mud Bay Road over Mud Bay?
The structure is 208 ft (63.4 m) long with a longest span of 35 ft (10.7 m) and a deck 46 ft wide.
Who owns Mud Bay Road over Mud Bay?
It is owned by the County Highway Agency.