STC 8423;LK LOWELL
Carrying STC 8423;LK LOWELL over DEER FLAT NAMPA CANAL
1.3 S 2.8 W NAMPA, Canyon, Idaho
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: STC 8423;LK LOWELL
The STC 8423;LK LOWELL bridge in Canyon, Idaho carries STC 8423;LK LOWELL over DEER FLAT NAMPA CANAL. It was built in 1992, making it 34 years old today. The structure is built primarily of concrete and spans 1 section, stretching 7.6 meters (25 feet) end to end. Daily traffic averages 6,200 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 6/9, superstructure at 6/9, substructure at 6/9. The weakest component sits in fair condition. All reported major components score above the Poor range. Its NBI inventory load rating is 20.9 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How STC 8423;LK LOWELL 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 How the historical reference is calculated.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
- 1992
- Material
- Concrete
- Number of Spans
- 1
- Structure Length
- 7.6 m (25 ft)
- Deck Width
- 15.2 m (50 ft)
- Owner
- City/Municipal Highway Agency
- Avg Daily Traffic
- 6,200 vehicles/day
- Structure Number
- 000000000021857
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • At 6/9, the deck (driving surface) shows fair condition, with minor wear flagged for upkeep.
- • The superstructure (beams and supports above the deck) rates fair at 6/9, minor deterioration that routine maintenance should address.
- • The substructure (piers and abutments) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
How to read this record
This page shows what the last federal inspection recorded, not whether STC 8423;LK LOWELL 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 STC 8423;LK LOWELL against other structures in Canyon 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 STC 8423;LK LOWELL?
STC 8423;LK LOWELL in Canyon, Idaho has a deck rating of 6/9, superstructure rating of 6/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is STC 8423;LK LOWELL inspected?
STC 8423;LK LOWELL'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 6,200 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. STC 8423;LK LOWELL 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 STC 8423;LK LOWELL?
STC 8423;LK LOWELL has an NBI inventory load rating of 20.9 metric tons.
Who is responsible for maintaining STC 8423;LK LOWELL?
STC 8423;LK LOWELL is owned and maintained by City/Municipal Highway Agency.
How old is STC 8423;LK LOWELL and does age affect safety?
STC 8423;LK LOWELL was built in 1992, making it 34 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.