ALTERGOTT/2420 over Palouse River
Whitman County, Washington · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- ALTERGOTT/2420 over Palouse River in Whitman County, Washington, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1990, making it 35 years old at the 2025 inventory.
- It carries about 39 vehicles a day (traffic count year 2021).
- Its listed owner is the county highway agency.
- It is one of 182 of the 349 inventoried bridges in Whitman County rated good (52.1%); 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 2023, on a 24-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (46.94707, -117.14568)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete tee beam |
| Length | about 154 ft |
| Location | 0.68 Mi NE SR 272 |
| NBI structure number | 085770000000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | November 2023 |
| 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 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.