Dupont HWY/US13 over Isaacs Branch
Kent County, Delaware · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Dupont HWY/US13 over Isaacs Branch in Kent County, Delaware, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1952, making it 73 years old at the 2025 inventory.
- It carries about 38,782 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 84 of the 192 inventoried bridges in Kent County rated fair (43.8%); 2 (1.0%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated October 2021, on a 48-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (39.12363, -75.53236)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 34 ft |
| Location | South of Dover |
| NBI structure number | 2003A024 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2021 |
| Inspection interval (item 91) | 48 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
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 |
| 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 |
| US 113 & SR1 SB over Murderkill River | 1965 | 23,353 | Fair |
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.