PROSPECT RD
Carrying PROSPECT RD over CLOSES CREEK
Prospect Rd. at Closes Cr, Polk, Iowa
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: PROSPECT RD
The PROSPECT RD bridge in Polk, Iowa carries PROSPECT RD over CLOSES CREEK. It was built in 1984, making it 42 years old today. The structure is built primarily of concrete and spans 4 sections, stretching 12.8 meters (42 feet) end to end. Daily traffic averages 2,245 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 culvert at 6/9. 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 32.7 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How PROSPECT RD 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 How the historical reference is calculated.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
- 1984
- Material
- Concrete
- Number of Spans
- 4
- Structure Length
- 12.8 m (42 ft)
- Deck Width
- 7.3 m (24 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 2,245 vehicles/day
- Structure Number
- 000000000505080
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 PROSPECT RD 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 PROSPECT RD 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 PROSPECT RD?
PROSPECT RD in Polk, Iowa on the FHWA's 0–9 scale.
How often is PROSPECT RD inspected?
PROSPECT RD'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 2,245 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. PROSPECT RD 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 PROSPECT RD?
PROSPECT RD has an NBI inventory load rating of 32.7 metric tons.
Who is responsible for maintaining PROSPECT RD?
PROSPECT RD is owned and maintained by City/Municipal Highway Agency.
How old is PROSPECT RD and does age affect safety?
PROSPECT RD was built in 1984, making it 42 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.