Big ALKALI/7005 over Alkali Flat Creek
Whitman County, Washington · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Big ALKALI/7005 over Alkali Flat Creek in Whitman County, Washington, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1962, making it 63 years old at the 2025 inventory.
- It carries about 136 vehicles a day (traffic count year 2020).
- Its listed owner is the county highway agency.
- It is one of 154 of the 349 inventoried bridges in Whitman County rated fair (44.1%); 13 (3.7%) 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 November 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 → (46.6811, -117.89443)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Prestressed concrete tee beam |
| Length | about 34 ft |
| Location | 0.77 Mi E Little Goose Dm |
| NBI structure number | 083035000000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | November 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | U: unknown foundation, not evaluated for scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Washington department of transportation.
Busiest bridges in Whitman County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR 27 over S Fk Palouse River | 1977 | 18,772 | Good |
| SR 27 over Missouri Flat CR | 1955 | 17,702 | Fair |
| Bishop Blvd over Paradise Creek | 1985 | 15,937 | Fair |
| Bishop Blvd over S Fork Palouse River | 1992 | 15,937 | Good |
| Stadium Way over Missouri Flat Creek | 1946 | 14,901 | Fair |
| SR 270 over S Fk Palouse | 1996 | 10,725 | Good |
All bridges nearby: Whitman County, WA bridge conditions · every bridge in Whitman County · Washington bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.