SMA7344;BRYDEN CYN
Carrying SMA7344;BRYDEN CYN over SNAKE R;HIGH/SOUTHWAY BR
IN LEWISTON;BRYDEN EXT, Nez Perce, Idaho
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
SMA7344;BRYDEN CYN in Nez Perce, Idaho sits above 53% of rated Idaho bridges on inventory load rating (33 t), while its 1982 build year is earlier than 44% of Nez Perce's recorded-year cohort (71 bridges).
SMA7344;BRYDEN CYN in Nez Perce, Idaho is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1982, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 6. The lowest applicable rating sets the federal condition category, so this Fair result describes the weakest reported component rather than the structure as a whole. No NBI category is a closure decision or a live crossing-safety verdict.
NBI record plate
Structure ID:000000000021495
LATE-CENTURY · PRESTRESS · LONG-SPAN-RUN · TIED-CTRL · HEAVY-ADT · STANDARD-LOAD · CAT-FAIR
- LATE-CENTURY 1980–1999
- PRESTRESS Prestressed concrete
- LONG-SPAN-RUN 5 spans
- TIED-CTRL Tied control
- HEAVY-ADT Heavy ADT
- STANDARD-LOAD Standard load
- CAT-FAIR Fair
Inspection-sheet codes from this record’s year, material family, spans, controlling component, ADT, inventory load, and NBI category, not a live closure verdict.
Bridge Snapshot: SMA7344;BRYDEN CYN
The SMA7344;BRYDEN CYN bridge in Nez Perce, Idaho carries SMA7344;BRYDEN CYN over SNAKE R;HIGH/SOUTHWAY BR. It was built in 1982, making it 44 years old today. The structure is built primarily of prestressed concrete continuous and spans 5 sections, stretching 568.8 meters (1866 feet) end to end. Daily traffic averages 21,000 vehicles, placing it in the heavily-trafficked tier of Idaho bridges. It is owned and maintained by County 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. None of this bridge's reported major components fall into the Poor condition range.
How SMA7344;BRYDEN CYN compares
Age against the county: built in 1982, earlier than 31 of Nez Perce's 71 bridges with a recorded construction year (44%), against a county median build year of 1979. This is one of the newer structures in its county.
Live comparison across Idaho bridges with a recorded inventory load rating (4,574 of 4,616 rated).
SMA7344;BRYDEN CYN vs every rated Idaho bridge
Inventory load rating (metric tons), FHWA NBI, this state
33 Top 47% higher than 53% of 4,574 bridges
rated Idaho bridges, bucketed by value
Each bar is a band; taller bars hold more bridges. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source FHWA National Bridge Inventory · August 2026
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Reported 0–9 component ratings from the FHWA NBI. The highlighted component is the lowest reported input to this record’s current condition category; it is not a closure or live crossing-safety decision.
Nez Perce inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 71 bridges in this county. Orthogonal to this structure's component profile above: a county catalog share, not a live crossing-safety verdict.
Structural Details
- Year Built
- 1982
- Material
- Prestressed Concrete Continuous
- Number of Spans
- 5
- Structure Length
- 568.8 m (1866 ft)
- Deck Width
- 21.3 m (70 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 21,000 vehicles/day
- Structure Number
- 000000000021495
Condition Analysis
- • The deck (driving surface) rates fair at 6/9, minor deterioration that routine maintenance should address.
- • The superstructure (beams and supports above the deck) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
- • At 6/9, the substructure (piers and abutments) shows fair condition, with minor wear flagged for upkeep.
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 SMA7344;BRYDEN CYN 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 SMA7344;BRYDEN CYN against other structures in Nez Perce 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 SMA7344;BRYDEN CYN?
SMA7344;BRYDEN CYN in Nez Perce, 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 SMA7344;BRYDEN CYN inspected?
SMA7344;BRYDEN CYN'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 21,000 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. SMA7344;BRYDEN CYN 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 SMA7344;BRYDEN CYN?
SMA7344;BRYDEN CYN has an NBI inventory load rating of 32.7 metric tons.
Who is responsible for maintaining SMA7344;BRYDEN CYN?
SMA7344;BRYDEN CYN is owned and maintained by County Highway Agency.
How old is SMA7344;BRYDEN CYN and does age affect safety?
SMA7344;BRYDEN CYN was built in 1982, making it 44 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.
Share this inspection record
Send this source-bounded record or download its data card. An NBI condition category is not a closure or live crossing-safety verdict.
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Component ratings, ADT, and condition category on this page are copied from the NBI record for this structure; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.