Bridge conditions in New Castle County, Delaware
528 inventoried bridges · 5 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 528 bridges in New Castle County: 209 rated good, 314 fair, and 5 poor.
- 5 of the 528 bridges in New Castle County, Delaware, are rated in poor condition (0.9%) in the 2025 National Bridge Inventory, as of .
- 209 bridges (39.6%) are rated good and 314 (59.5%) fair.
- The median New Castle County bridge was built in 1976.
- The busiest poor-rated bridge is I 495 SB over I 95 NB (built 1965), carrying about 84,782 vehicles a day.
Good 39.6% · Fair 59.5% · Poor 0.9% of 528 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 495 SB over I 95 NB | 1965 | 84,782 | Poor |
| Dupont PKW/US13 SB over Blackbird Creek | 1920 | 11,020 | Poor |
| South Heald St over Norfolk Southern | 1942 | 7,915 | Poor |
| Delaware Rt. 9 over C&d Canal | 1969 | 1,203 | Poor |
| SR 9 over Appoquinimink River | 1973 | 840 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I95 / Jfk Mem Hgwy over Norfolk Southern | 1962 | 117,657 | Fair |
| I 95 NB over Christina Creek | 1962 | 109,932 | Fair |
| I 95 SB over Christina Creek | 1962 | 109,932 | Fair |
| I95SB/JFK Mem Hgwy over SR1/KOREAN War Vet Mem | 1963 | 103,953 | Fair |
| I 95 NB over SR1/KOREAN War Vet Mem | 1963 | 103,953 | Fair |
| I 495 over Terminal Ave Rd 359 | 1972 | 101,111 | Fair |
| I 95 NB over I 95 I 495 S to I 295 N | 1966 | 95,743 | Fair |
| I 95 NB over I 295 SB | 1959 | 95,743 | Fair |
| I 95 over Christina River | 1965 | 90,773 | Fair |
| I 95 over Norfolk Southern | 1962 | 90,773 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Delaware: Delaware bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.