IRON BRANCH RD
Carrying IRON BRANCH RD over IRON BRANCH
S/E OF MILLSBORO, Sussex, Delaware
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
IRON BRANCH RD in Sussex, Delaware sits above 57% of rated Delaware bridges on inventory load rating (39 t), while its 1964 build year is earlier than 65% of Sussex's recorded-year cohort (153 bridges).
IRON BRANCH RD in Sussex, Delaware is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 1964, it carries 1 rated component on the inspecting agency's 0-9 scale, and its weakest reported component scores 7. 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 DE:3525 331
INTERSTATE-ERA · CONCRETE · MULTI-SPAN · CULVERT-LED · ARTERIAL-ADT · STANDARD-LOAD · CAT-GOOD
- INTERSTATE-ERA 1950–1979
- CONCRETE Concrete
- MULTI-SPAN 3 spans
- CULVERT-LED Culvert-led
- ARTERIAL-ADT Arterial ADT
- STANDARD-LOAD Standard load
- 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: IRON BRANCH RD
The IRON BRANCH RD bridge in Sussex, Delaware carries IRON BRANCH RD over IRON BRANCH. It was built in 1964, making it 62 years old today. The structure is built primarily of concrete and spans 3 sections, stretching 9.9 meters (32 feet) end to end. Daily traffic averages 4,218 vehicles, placing it in the moderately-trafficked tier of Delaware bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show culvert at 7/9. The weakest component sits in good condition. No reported major component scores in the Poor range under the current federal condition thresholds.
How IRON BRANCH RD compares
Age against the county: built in 1964, earlier than 99 of Sussex's 153 bridges with a recorded construction year (65%), against a county median build year of 1973. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Delaware bridges with a recorded inventory load rating (872 rated).
IRON BRANCH RD vs every rated Delaware bridge
Inventory load rating (metric tons), FHWA NBI, this state
39 Top 43% higher than 57% of 872 bridges
rated Delaware 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.
Sussex inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 153 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
- 1964
- Material
- Concrete
- Number of Spans
- 3
- Structure Length
- 9.9 m (32 ft)
- Deck Width
- 10.8 m (35 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 4,218 vehicles/day
- Structure Number
- 3525 331
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 IRON BRANCH RD 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 IRON BRANCH RD against other structures in Sussex and across Delaware. Delaware 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 IRON BRANCH RD?
IRON BRANCH RD in Sussex, Delaware on the FHWA's 0–9 scale.
How often is IRON BRANCH RD inspected?
IRON BRANCH RD'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 4,218 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. IRON BRANCH RD 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 IRON BRANCH RD?
IRON BRANCH RD has an NBI inventory load rating of 38.9 metric tons.
Who is responsible for maintaining IRON BRANCH RD?
IRON BRANCH RD is owned and maintained by State Highway Agency.
How old is IRON BRANCH RD and does age affect safety?
IRON BRANCH RD was built in 1964, making it 62 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.