Constr. Fac. Br. over Powerhouse Forebay Water
Garfield County, Washington · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Constr. Fac. Br. over Powerhouse Forebay Water in Garfield County, Washington, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1973, making it 52 years old at the 2025 inventory.
- It carries about 50 vehicles a day (traffic count year 2019).
- It is one of 23 of the 54 inventoried bridges in Garfield County rated fair (42.6%); 4 (7.4%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated August 2024, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (46.65677, -117.43154)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 163 ft |
| Location | Lower Granite Dam |
| NBI structure number | CEPNPWWA0LGRCON |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Washington department of transportation.
Busiest bridges in Garfield County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 12 over Stember CR | 1964 | 2,936 | Good |
| US 12 over Pataha CR | 1920 | 1,889 | Poor |
| SR 127 over Deadman Creek | 1969 | 929 | Good |
| SR 127 over Snake R Central Ferry | 1969 | 868 | Fair |
| Fairgrounds Rd over Pataha Creek | 1959 | 800 | Fair |
| 15TH Street over Pataha CR | 1925 | 680 | Fair |
All bridges nearby: Garfield County, WA bridge conditions · every bridge in Garfield County · Washington bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.