RAMP 45TH TO I-5 N
Carrying RAMP 45TH TO I-5 N over RAMP NB I-5 TO 50TH
1.4 N JCT SR 520, King, Washington
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
RAMP 45TH TO I-5 N in King, Washington sits above 88% of rated Washington bridges on inventory load rating (51 t), while its 1961 build year is earlier than 79% of King's recorded-year cohort (1,238 bridges).
RAMP 45TH TO I-5 N in King, Washington is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 1961, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 7. The lowest applicable rating sets the federal condition category, so this Good result describes the weakest reported component rather than the structure as a whole. No NBI category is a closure decision or a live crossing-safety verdict.
NBI record plate
Structure WA:0006304A0000000
INTERSTATE-ERA · CONCRETE · SINGLE-SPAN · TIED-CTRL · HEAVY-ADT · HEAVY-LOAD · CAT-GOOD
- INTERSTATE-ERA 1950–1979
- CONCRETE Concrete
- SINGLE-SPAN Single span
- TIED-CTRL Tied control
- HEAVY-ADT Heavy ADT
- HEAVY-LOAD Heavy load
- CAT-GOOD Good
Inspection-sheet codes from this record’s year, material family, spans, controlling component, ADT, inventory load, and NBI category, not a live closure verdict.
Bridge Snapshot: RAMP 45TH TO I-5 N
The RAMP 45TH TO I-5 N bridge in King, Washington carries RAMP 45TH TO I-5 N over RAMP NB I-5 TO 50TH. It was built in 1961, making it 65 years old today. The structure is built primarily of concrete and spans 1 section, stretching 13.4 meters (44 feet) end to end. Daily traffic averages 10,094 vehicles, placing it in the heavily-trafficked tier of Washington bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 7/9, substructure at 7/9. The weakest component sits in good condition. No reported major component scores in the Poor range under the current federal condition thresholds.
How RAMP 45TH TO I-5 N compares
Age against the county: built in 1961, earlier than 981 of King's 1,238 bridges with a recorded construction year (79%), against a county median build year of 1972. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Washington bridges with a recorded inventory load rating (8,455 of 8,474 rated).
RAMP 45TH TO I-5 N vs every rated Washington bridge
Inventory load rating (metric tons), FHWA NBI, this state
51 Top 12% higher than 88% of 8,455 bridges
rated Washington bridges, bucketed by value
Each bar is a band; taller bars hold more bridges. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source FHWA National Bridge Inventory · August 2026
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Reported 0–9 component ratings from the FHWA NBI. The highlighted component is the lowest reported input to this record’s current condition category; it is not a closure or live crossing-safety decision.
King inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 1,238 bridges in this county. Orthogonal to this structure's component profile above: a county catalog share, not a live crossing-safety verdict.
Structural Details
- Year Built
- 1961
- Material
- Concrete
- Number of Spans
- 1
- Structure Length
- 13.4 m (44 ft)
- Deck Width
- 9.0 m (30 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 10,094 vehicles/day
- Structure Number
- 0006304A0000000
Condition Analysis
- • The deck (driving surface) rates good at 7/9, with no significant deterioration on file.
- • The superstructure (beams and supports above the deck) is in good condition (7/9), showing no significant deterioration.
- • At 7/9, the substructure (piers and abutments) is in good shape and shows no significant wear.
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 RAMP 45TH TO I-5 N 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 RAMP 45TH TO I-5 N against other structures in King 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 RAMP 45TH TO I-5 N?
RAMP 45TH TO I-5 N in King, Washington has a deck rating of 7/9, superstructure rating of 7/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is RAMP 45TH TO I-5 N inspected?
RAMP 45TH TO I-5 N'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 10,094 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. RAMP 45TH TO I-5 N is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for RAMP 45TH TO I-5 N?
RAMP 45TH TO I-5 N has an NBI inventory load rating of 50.8 metric tons.
Who is responsible for maintaining RAMP 45TH TO I-5 N?
RAMP 45TH TO I-5 N is owned and maintained by State Highway Agency.
How old is RAMP 45TH TO I-5 N and does age affect safety?
RAMP 45TH TO I-5 N was built in 1961, making it 65 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.
Share this inspection record
Send this source-bounded record or download its data card. An NBI condition category is not a closure or live crossing-safety verdict.
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Component ratings, ADT, and condition category on this page are copied from the NBI record for this structure; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.