SR 20 Extension over Keystone Harbor
Fair Condition47 years old1,863 vehicles/day
Location
| State | Washington |
| County | Island |
| Location | 3.4 W Jct SR 525 |
| Carries | SR 20 Extension |
| Crosses | Keystone Harbor |
| Coordinates | 48.15936, -122.67272 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 5 (Fair) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 3 — Scour critical |
Physical Characteristics
| Material | Steel |
| Design | Movable - Lift |
| Total Length | 105.0 ft (32 m) |
| Max Span | 100.1 ft (30.5 m) |
| Deck Width | 24.0 ft (7.3 m) |
| Deck Area | 233.6 sq m |
| Main Spans | 2 |
| Year Built | 1979 |
Traffic
| Avg Daily Traffic | 1,863 (2010) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 623 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 0001697A0000000 |