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Allender Rd over Stillwater Creek

Cowlitz County, Washington · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled

View this bridge on a map → (46.38472, -123.04917)

Component ratings

ComponentRating (2024)Rating (2025)FHWA scale meaning
Culvert66Satisfactory condition

Bridge details

StructureContinuous concrete culvert
Lengthabout 29 ft
Location0.36 W SR 506 (mp 0.86)
NBI structure number085788000000000
Condition classFair
Traffic status (item 41)Posted for load
Last inspection (item 90)July 2023
Inspection interval (item 91)24 months
Scour (item 113)5: foundations stable, scour within the limits of the footing or piles

Source: FHWA National Bridge Inventory, 2025 data as reported by the Washington department of transportation.

Busiest bridges in Cowlitz County

BridgeBuiltVehicles/dayCondition
I-5 over Bn Ry197237,599Fair
I-5 over Kalama River197137,279Good
I-5 over Kalama River197037,279Good
I-5 over Owl Creek197236,932Good
I-5 over Owl Creek197236,932Good
I-5 over Todd Rd197135,483Good

All bridges nearby: Cowlitz County, WA bridge conditions · every bridge in Cowlitz County · Washington bridges.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.