12TH ST
Carrying 12TH ST over NORFOLK SOUTHERN
WILMINGTON, New Castle, Delaware
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
12TH ST in New Castle, Delaware sits above 10% of rated Delaware bridges on inventory load rating (27 t), while its 1977 build year is earlier than 47% of New Castle's recorded-year cohort (527 bridges).
12TH ST in New Castle, Delaware is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 1977, it carries 3 rated components 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:1814 009
INTERSTATE-ERA · STEEL · MULTI-SPAN · TIED-CTRL · ARTERIAL-ADT · STANDARD-LOAD · CAT-GOOD
- INTERSTATE-ERA 1950–1979
- STEEL Steel
- MULTI-SPAN 2 spans
- TIED-CTRL Tied control
- 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: 12TH ST
The 12TH ST bridge in New Castle, Delaware carries 12TH ST over NORFOLK SOUTHERN. It was built in 1977, making it 49 years old today. The structure is built primarily of steel continuous and spans 2 sections, stretching 87.7 meters (288 feet) end to end. Daily traffic averages 5,790 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 a deck rating of 7/9, superstructure at 7/9, substructure at 7/9. The weakest component sits in good condition. None of this bridge's reported major components fall into the Poor condition range.
How 12TH ST compares
Age against the county: built in 1977, earlier than 247 of New Castle's 527 bridges with a recorded construction year (47%), against a county median build year of 1976. This is one of the newer structures in its county.
Live comparison across Delaware bridges with a recorded inventory load rating (872 rated).
12TH ST vs every rated Delaware bridge
Inventory load rating (metric tons), FHWA NBI, this state
27 Top 90% higher than 10% 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.
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.
New Castle inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 527 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
- 1977
- Material
- Steel Continuous
- Number of Spans
- 2
- Structure Length
- 87.7 m (288 ft)
- Deck Width
- 20.7 m (68 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 5,790 vehicles/day
- Structure Number
- 1814 009
Condition Analysis
- • At 7/9, the deck (driving surface) is in good shape and shows no significant wear.
- • The superstructure (beams and supports above the deck) rates good at 7/9, with no significant deterioration on file.
- • The substructure (piers and abutments) rates good at 7/9, with no significant deterioration on file.
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 12TH 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 12TH ST against other structures in New Castle 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 12TH ST?
12TH ST in New Castle, Delaware has a deck rating of 7/9, superstructure rating of 7/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is 12TH ST inspected?
12TH 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 5,790 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. 12TH ST 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 12TH ST?
12TH ST has an NBI inventory load rating of 26.6 metric tons.
Who is responsible for maintaining 12TH ST?
12TH ST is owned and maintained by State Highway Agency.
How old is 12TH ST and does age affect safety?
12TH ST was built in 1977, making it 49 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.