120TH ST
Carrying 120TH ST over CREEK
078041601, Muscatine, Iowa
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
120TH ST in Muscatine, Iowa sits above 70% of rated Iowa bridges on inventory load rating (34 t), while its 2020 build year is earlier than 3% of Muscatine's recorded-year cohort (144 bridges).
120TH ST in Muscatine, Iowa is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 2020, it carries 1 rated component on the inspecting agency's 0-9 scale, and its weakest reported component scores 8. 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 IA:000000000258411
POST-2000 · CONCRETE · MULTI-SPAN · CULVERT-LED · LOCAL-ADT · STANDARD-LOAD · CAT-GOOD
- POST-2000 2000+
- CONCRETE Concrete
- MULTI-SPAN 2 spans
- CULVERT-LED Culvert-led
- LOCAL-ADT Local ADT
- STANDARD-LOAD Standard 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.
Structural health score
A composite of the deck, superstructure, and substructure NBI condition ratings plus the inventory load rating, benchmarked against the full national bridge corpus, distinct from the Good/Fair/Poor category above.
Bridge Snapshot: 120TH ST
The 120TH ST bridge in Muscatine, Iowa carries 120TH ST over CREEK. It was built in 2020, making it 6 years old today. The structure is built primarily of concrete continuous and spans 2 sections, stretching 8.8 meters (29 feet) end to end. Daily traffic averages 91 vehicles, placing it in the lower-traffic tier of Iowa bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection places the weakest component in good condition (see the full component ratings below). All reported major components score above the Poor range.
How 120TH ST compares
Age against the county: built in 2020, earlier than 5 of Muscatine's 144 bridges with a recorded construction year (3%), against a county median build year of 1978. This is one of the newer structures in its county.
Live comparison across Iowa bridges with a recorded inventory load rating (23,718 of 23,719 rated).
120TH ST vs every rated Iowa bridge
Inventory load rating (metric tons), FHWA NBI, this state
34 Top 30% higher than 70% of 23,718 bridges
rated Iowa 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.
Muscatine inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 144 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
- 2020
- Material
- Concrete Continuous
- Number of Spans
- 2
- Structure Length
- 8.8 m (29 ft) 0
- Owner
- County Highway Agency
- Avg Daily Traffic
- 91 vehicles/day
- Structure Number
- 000000000258411
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 120TH ST 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 120TH ST against other structures in Muscatine and across Iowa. Iowa 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 120TH ST?
120TH ST in Muscatine, Iowa on the FHWA's 0–9 scale.
How often is 120TH ST inspected?
120TH ST'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 91 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. 120TH ST 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 120TH ST?
120TH ST has an NBI inventory load rating of 34.3 metric tons.
Who is responsible for maintaining 120TH ST?
120TH ST is owned and maintained by County Highway Agency.
How old is 120TH ST and does age affect safety?
120TH ST was built in 2020, making it 6 years old.
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.