SMA 7872; 8TH ST
Carrying SMA 7872; 8TH ST over 'B-4' CANAL
IN RUPERT;8TH STREET, Minidoka, Idaho
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: SMA 7872; 8TH ST
The SMA 7872; 8TH ST bridge in Minidoka, Idaho carries SMA 7872; 8TH ST over 'B-4' CANAL. It was built in 1965, making it 61 years old today. The structure is built primarily of steel continuous and spans 2 sections, stretching 12.2 meters (40 feet) end to end. Daily traffic averages 4,000 vehicles, placing it in the moderately-trafficked tier of Idaho bridges. It is owned and maintained by City/Municipal Highway Agency.
The latest FHWA inspection records show a deck rating of 5/9, superstructure at 5/9, substructure at 5/9. The weakest component sits in fair condition. All reported major components score above the Poor range. Its NBI inventory load rating is 25.4 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How SMA 7872; 8TH ST compares
Live comparison across Idaho.
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 How the historical reference is calculated.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
- 1965
- Material
- Steel Continuous
- Number of Spans
- 2
- Structure Length
- 12.2 m (40 ft)
- Deck Width
- 8.5 m (28 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 4,000 vehicles/day
- Structure Number
- 000000000025140
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates fair at 5/9, minor deterioration that routine maintenance should address.
- • At 5/9, the superstructure (beams and supports above the deck) shows fair condition, with minor wear flagged for upkeep.
- • The substructure (piers and abutments) rates fair at 5/9, minor deterioration that routine maintenance should address.
How to read this record
This page shows what the last federal inspection recorded, not whether SMA 7872; 8TH 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 SMA 7872; 8TH ST against other structures in Minidoka and across Idaho. Idaho 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 SMA 7872; 8TH ST?
SMA 7872; 8TH ST in Minidoka, Idaho has a deck rating of 5/9, superstructure rating of 5/9, and substructure rating of 5/9 on the FHWA's 0–9 scale.
How often is SMA 7872; 8TH ST inspected?
SMA 7872; 8TH 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 4,000 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. SMA 7872; 8TH ST 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 SMA 7872; 8TH ST?
SMA 7872; 8TH ST has an NBI inventory load rating of 25.4 metric tons.
Who is responsible for maintaining SMA 7872; 8TH ST?
SMA 7872; 8TH ST is owned and maintained by City/Municipal Highway Agency.
How old is SMA 7872; 8TH ST and does age affect safety?
SMA 7872; 8TH ST was built in 1965, making it 61 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.