SR 21 over Marlin Hollow Relief
Lincoln County, Washington · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR 21 over Marlin Hollow Relief in Lincoln County, Washington, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 1970, making it 55 years old at the 2025 inventory.
- It carries about 255 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 102 of the 180 inventoried bridges in Lincoln County rated good (56.7%); 11 (6.1%) are rated poor.
- 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 → (47.46392, -118.76555)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 20 ft |
| Location | 11.9 N Jct SR 28 |
| NBI structure number | 002003510000000 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Washington department of transportation.
Busiest bridges in Lincoln County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-90 over Brown Road | 1967 | 10,697 | Fair |
| I-90 over Brown Road | 1967 | 10,697 | Fair |
| I-90 over Doerschlag Rd | 1968 | 10,667 | Fair |
| I-90 over Doerschlag Rd | 1968 | 10,667 | Poor |
| I-90 over SR 23 | 1967 | 10,191 | Fair |
| I-90 over SR 23 | 1967 | 10,191 | Fair |
All bridges nearby: Lincoln County, WA bridge conditions · every bridge in Lincoln County · Washington bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.