IS 170 E
Carrying IS 170 E over RVR DES PERES
S 29 T 46 N R 6 E, St. Louis, Missouri
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
IS 170 E in St. Louis, Missouri is rated Poor in the FHWA's 2024 National Bridge Inventory.
Built in 1968, it carries 1 rated component on the inspecting agency's 0-9 scale, and its weakest reported component scores 4. The lowest applicable rating sets the federal condition category, so this Poor 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 MO:2424
INTERSTATE-ERA · CONCRETE · MULTI-SPAN · CULVERT-LED · HEAVY-ADT · HEAVY-LOAD · CAT-POOR
- INTERSTATE-ERA 1950–1979
- CONCRETE Concrete
- MULTI-SPAN 3 spans
- CULVERT-LED Culvert-led
- HEAVY-ADT Heavy ADT
- HEAVY-LOAD Heavy load
- CAT-POOR Poor
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: IS 170 E
The IS 170 E bridge in St. Louis, Missouri carries IS 170 E over RVR DES PERES. It was built in 1968, making it 58 years old today. The structure is built primarily of concrete continuous and spans 3 sections, stretching 17.1 meters (56 feet) end to end. Daily traffic averages 94,602 vehicles, placing it in the heavily-trafficked tier of Missouri bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show culvert at 4/9. The weakest component sits in poor condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules.
How IS 170 E compares
Age against the county: built in 1968, earlier than 696 of St. Louis's 912 bridges with a recorded construction year (76%), against a county median build year of 1990. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Missouri bridges with a recorded inventory load rating (24,616 of 24,618 rated).
IS 170 E vs every rated Missouri bridge
Inventory load rating (metric tons), FHWA NBI, this state
43 Top 23% higher than 77% of 24,616 bridges
rated Missouri 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.
St. Louis inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 912 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
- 1968
- Material
- Concrete Continuous
- Number of Spans
- 3
- Structure Length
- 17.1 m (56 ft) 0
- Owner
- State Highway Agency
- Avg Daily Traffic
- 94,602 vehicles/day
- Structure Number
- 2424
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
IS 170 E is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare IS 170 E against other structures in St. Louis and across Missouri. Missouri 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 IS 170 E?
IS 170 E in St. Louis, Missouri on the FHWA's 0–9 scale.
How often is IS 170 E inspected?
IS 170 E'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 94,602 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. IS 170 E is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for IS 170 E?
IS 170 E has an NBI inventory load rating of 43.2 metric tons.
Who is responsible for maintaining IS 170 E?
IS 170 E is owned and maintained by State Highway Agency.
How old is IS 170 E and does age affect safety?
IS 170 E was built in 1968, making it 58 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.