Mildred Lane over Walnut Creek
Marion County, Oregon · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Mildred Lane over Walnut Creek in Marion County, Oregon, 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 1999, making it 26 years old at the 2025 inventory.
- It carries about 4,872 vehicles a day (traffic count year 2020).
- Its listed owner is a city or municipal highway agency.
- It is one of 84 of the 375 inventoried bridges in Marion County rated good (22.4%); 29 (7.7%) 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 → (44.87348, -123.02848)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 23 ft |
| Location | .1 Mi W of Commercial St |
| NBI structure number | 18814 000 00000 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oregon department of transportation.
Busiest bridges in Marion County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Chemawa Road over I-5 (Hwy 1) | 1975 | 102,351 | Fair |
| Chemawa Road over UPRR & Indian School Rd | 1983 | 102,351 | Fair |
| Chemawa Rd over Ulali Drive | 2006 | 102,351 | Fair |
| I-5 (Hwy 1) over State Street | 2000 | 101,907 | Fair |
| I-5 (Hwy 1) over Mill Creek Oflow | 2008 | 101,907 | Fair |
| I-5 (Hwy 1) over Mill Creek Oflow | 2007 | 101,907 | Good |
All bridges nearby: Marion County, OR bridge conditions · every bridge in Marion County · Oregon bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.