GRANT ST SOUTH
Carrying GRANT ST SOUTH over MUD CREEK
079220602, Polk, Iowa
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: GRANT ST SOUTH
The GRANT ST SOUTH bridge in Polk, Iowa carries GRANT ST SOUTH over MUD CREEK. It was built in 1927, making it 99 years old today. The structure is built primarily of concrete and spans 1 section, stretching 6.7 meters (22 feet) end to end. Daily traffic averages 2,902 vehicles, placing it in the moderately-trafficked tier of Iowa bridges. It is owned and maintained by City/Municipal Highway Agency.
The latest FHWA inspection records show a deck rating of 3/9, superstructure at 3/9, substructure 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. Its NBI inventory load rating is 15.1 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How GRANT ST SOUTH compares
Live comparison across Iowa.
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 How the historical reference is calculated.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
- 1927
- Material
- Concrete
- Number of Spans
- 1
- Structure Length
- 6.7 m (22 ft)
- Deck Width
- 7.9 m (26 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 2,902 vehicles/day
- Structure Number
- 000000000504705
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates poor at 3/9, advanced deterioration that should be prioritized for repair.
- • The superstructure (beams and supports above the deck) is in poor condition (3/9), showing advanced deterioration that may require priority repair.
- • The substructure (piers and abutments) rates poor at 4/9, advanced deterioration that should be prioritized for repair.
How to read this record
GRANT ST SOUTH 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 GRANT ST SOUTH against other structures in Polk 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 GRANT ST SOUTH?
GRANT ST SOUTH in Polk, Iowa has a deck rating of 3/9, superstructure rating of 3/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is GRANT ST SOUTH inspected?
GRANT ST SOUTH'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 2,902 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. GRANT ST SOUTH 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 GRANT ST SOUTH?
GRANT ST SOUTH has an NBI inventory load rating of 15.1 metric tons.
Who is responsible for maintaining GRANT ST SOUTH?
GRANT ST SOUTH is owned and maintained by City/Municipal Highway Agency.
How old is GRANT ST SOUTH and does age affect safety?
GRANT ST SOUTH was built in 1927, making it 99 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.