Spillway Bridge over Spillway Channel
Good Condition58 years old150 vehicles/day
Location
| State | Washington |
| County | Garfield |
| Location | Lower Granite Dam |
| Carries | Spillway Bridge |
| Crosses | Spillway Channel |
| Coordinates | 46.65945, -117.42935 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 9 (Excellent) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 511.8 ft (156 m) |
| Max Span | 64.0 ft (19.5 m) |
| Deck Width | 35.8 ft (10.9 m) |
| Deck Area | 1700.4 sq m |
| Main Spans | 8 |
| Year Built | 1968 |
Traffic
| Avg Daily Traffic | 150 (2020) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 921 |
| Inspection Frequency | Every 48 months |
| Owner | Corps of Engineers |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | CEPNPWWA0LGRSPY |