Irish Hill Rd. over Thorndyk Ditch
Kent County, Delaware · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irish Hill Rd. over Thorndyk Ditch in Kent County, Delaware, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 7 (good condition) on the 0-9 scale.
- It was built in 2019, making it 6 years old at the 2025 inventory.
- It carries about 2,191 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 106 of the 192 inventoried bridges in Kent County rated good (55.2%); 2 (1.0%) are rated poor.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (39.05508, -75.49445)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 8 | Very good condition |
| Superstructure | 8 | Very good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 60 ft |
| Location | S.W. of Magnolia |
| NBI structure number | 2031A031 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Delaware department of transportation.
Busiest bridges in Kent County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Bay Road / US113 over St. Jones River | 1984 | 39,952 | Fair |
| Dupont HWY/US13 over Isaacs Branch | 1952 | 38,782 | Fair |
| Korean War Vet Mem over SR10/E. Lebanon Rd. | 1993 | 37,408 | Good |
| SR1/KOREAN Vet War over Rd 331/DYKE Branch Rd | 1992 | 27,639 | Fair |
| Korean War Vet Hwy over Big Oak Rd | 1992 | 26,405 | Fair |
| Dupont HWY/US13 over Mill Creek | 1940 | 23,499 | Good |
All bridges nearby: Kent County, DE bridge conditions · every bridge in Kent County · Delaware bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.