188 SW
Carrying 188 SW over OVERFLOW CHANNEL
700 ft W Marble St SW, Thurston, Washington
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: 188 SW
The 188 SW bridge in Thurston, Washington carries 188 SW over OVERFLOW CHANNEL. It was built in 1981, making it 45 years old today. The structure is built primarily of steel and spans 3 sections, stretching 9.1 meters (30 feet) end to end. Daily traffic averages 291 vehicles, placing it in the lower-traffic tier of Washington bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show culvert at 5/9. The weakest component sits in fair condition. None of this bridge's reported major components fall into the Poor condition range. Its NBI inventory load rating is 38.1 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How 188 SW compares
Live comparison across Washington.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Structural Details
- Year Built
- 1981
- Material
- Steel
- Number of Spans
- 3
- Structure Length
- 9.1 m (30 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 291 vehicles/day
- Structure Number
- 080506000000000
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
This page shows what the last federal inspection recorded, not whether 188 SW is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare 188 SW against other structures in Thurston and across Washington. Washington bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for 188 SW?
188 SW in Thurston, Washington on the FHWA's 0–9 scale.
How often is 188 SW inspected?
188 SW's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 291 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. 188 SW is currently shown as Fair condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for 188 SW?
188 SW has an NBI inventory load rating of 38.1 metric tons.
Who is responsible for maintaining 188 SW?
188 SW is owned and maintained by County Highway Agency.
How old is 188 SW and does age affect safety?
188 SW was built in 1981, making it 45 years old.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A Poor condition rating is not a live declaration that a bridge is closed or unsafe for travel. For current closure, posting, or safety information, contact the responsible transportation agency.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.