FDR 345
Carrying FDR 345 over IRON CREEK
T 2 S R 6 E SEC 31, Custer, South Dakota
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
FDR 345 in Custer, South Dakota is rated Good in the FHWA's 2024 National Bridge Inventory.
Built in 1991, it carries 1 rated component on the inspecting agency's 0-9 scale, and its weakest reported component scores 8. The lowest applicable rating sets the federal condition category, so this Good 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 SD:020303000001026
LATE-CENTURY · MAT-OTHER · SINGLE-SPAN · CULVERT-LED · TRACE-ADT · LOAD-UNK · CAT-GOOD
- LATE-CENTURY 1980–1999
- MAT-OTHER Other
- SINGLE-SPAN Single span
- CULVERT-LED Culvert-led
- TRACE-ADT Trace ADT
- LOAD-UNK Load unrated
- CAT-GOOD Good
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: FDR 345
The FDR 345 bridge in Custer, South Dakota carries FDR 345 over IRON CREEK. It was built in 1991, making it 35 years old today. The structure is built primarily of aluminum/iron and spans 1 section, stretching 7.6 meters (25 feet) end to end. Daily traffic averages 25 vehicles, placing it in the lower-traffic tier of South Dakota bridges. It is owned and maintained by U.S. Forest Service.
The latest FHWA inspection records show culvert at 8/9. The weakest component sits in good condition. No reported major component scores in the Poor range under the current federal condition thresholds.
How FDR 345 compares
Age against the county: built in 1991, earlier than 26 of Custer's 95 bridges with a recorded construction year (27%), against a county median build year of 1974. This is one of the newer structures in its county.
Live comparison across South Dakota bridges with a recorded inventory load rating (5,886 of 5,887 rated).
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Custer inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 95 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
- 1991
- Material
- Aluminum/Iron
- Number of Spans
- 1
- Structure Length
- 7.6 m (25 ft) 0
- Owner
- U.S. Forest Service
- Avg Daily Traffic
- 25 vehicles/day
- Structure Number
- 020303000001026
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 FDR 345 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 FDR 345 against other structures in Custer and across South Dakota. South Dakota 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 FDR 345?
FDR 345 in Custer, South Dakota on the FHWA's 0–9 scale.
How often is FDR 345 inspected?
FDR 345'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 25 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. FDR 345 is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for FDR 345?
An inventory load rating is not recorded for FDR 345.
Who is responsible for maintaining FDR 345?
FDR 345 is owned and maintained by U.S. Forest Service.
How old is FDR 345 and does age affect safety?
FDR 345 was built in 1991, making it 35 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.