SR 20 over Eaglemount Half Bridge
GoodJefferson County, Washington · 2.2 E JCT US 101 · Structure no. 0005377A0000000
- Built
- 1956
- 69 years old
- Condition
- Good
- inspected August 2023
- Type
- Slab
- Concrete Continuous
- Length
- 72 ft
- 4 main spans
- Daily traffic
- 5,930
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 20 over Eaglemount Half Bridge is a concrete continuous slab carrying SR 20 over Eaglemount Half Bridge in Jefferson County, Washington. It was built in 1956, so it is 69 years old, older 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 5,930 vehicles a day, roughly 8% of them trucks, projected to reach 7,822 by 2039. The structure is 72 ft (21.9 m) long and 16 ft wide. If it were closed, the detour would be 14.3 mi (23 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 | 8 Very Good | No problems noted. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 20 over Eaglemount Half Bridge built?
It was built in 1956, making it 69 years old in 2025.
What condition is SR 20 over Eaglemount Half Bridge 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 August 2023.
How much traffic does SR 20 over Eaglemount Half Bridge carry?
About 5,930 vehicles per day (2023 count), of which roughly 8% are trucks.
How long is SR 20 over Eaglemount Half Bridge?
The structure is 72 ft (21.9 m) long with a longest span of 18 ft (5.5 m) and a deck 16 ft wide.
Who owns SR 20 over Eaglemount Half Bridge?
It is owned by the State Highway Agency.