ADAMS HOLLOW -154
Carrying ADAMS HOLLOW -154 over CREEK
S 1 T 30 N R 3 E, Iron, Missouri
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: ADAMS HOLLOW -154
The ADAMS HOLLOW -154 bridge in Iron, Missouri carries ADAMS HOLLOW -154 over CREEK. It was built in 1930, making it 96 years old today. It was last reconstructed in 1987, extending its service life. The structure is built primarily of steel continuous and spans 3 sections, stretching 11.0 meters (36 feet) end to end. Daily traffic averages 35 vehicles, placing it in the lower-traffic tier of Missouri bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show a deck rating of 5/9, superstructure at 6/9, substructure at 4/9. The weakest component sits in poor condition. A component scored 4 or below, placing this bridge in the federal Poor condition category rather than declaring it unsafe or closed. Its NBI inventory load rating is 99.9 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How ADAMS HOLLOW -154 compares
Live comparison across Missouri.
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 How the historical reference is calculated.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
- 1930
- Last Reconstructed
- 1987
- Material
- Steel Continuous
- Number of Spans
- 3
- Structure Length
- 11.0 m (36 ft)
- Deck Width
- 4.3 m (14 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 35 vehicles/day
- Structure Number
- 17495
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) is in fair condition (5/9), with minor deterioration that may require routine maintenance.
- • The superstructure (beams and supports above the deck) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
- • At 4/9, the substructure (piers and abutments) is in poor shape, with advanced wear flagged for priority repair.
How to read this record
ADAMS HOLLOW -154 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 ADAMS HOLLOW -154 against other structures in Iron 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 ADAMS HOLLOW -154?
ADAMS HOLLOW -154 in Iron, Missouri has a deck rating of 5/9, superstructure rating of 6/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is ADAMS HOLLOW -154 inspected?
ADAMS HOLLOW -154'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 35 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. ADAMS HOLLOW -154 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 ADAMS HOLLOW -154?
ADAMS HOLLOW -154 has an NBI inventory load rating of 99.9 metric tons.
Who is responsible for maintaining ADAMS HOLLOW -154?
ADAMS HOLLOW -154 is owned and maintained by County Highway Agency.
How old is ADAMS HOLLOW -154 and does age affect safety?
ADAMS HOLLOW -154 was built in 1930, making it 96 years old and last reconstructed in 1987.
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.