Snowden Lane over Heathcote Brook
Mercer County, New Jersey · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Snowden Lane over Heathcote Brook in Mercer County, New Jersey, 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 1979, making it 46 years old at the 2025 inventory.
- It carries about 1,485 vehicles a day (traffic count year 2023).
- Its listed owner is the county highway agency.
- It is one of 212 of the 413 inventoried bridges in Mercer County rated fair (51.3%); 36 (8.7%) 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 March 2023, on a 24-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 → (40.35814, -74.64075)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 20 ft |
| Location | 0.1 mile north of RT 27 |
| NBI structure number | 1103643 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the New Jersey department of transportation.
Busiest bridges in Mercer County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Route 29 Rampb over Assunpink Creek | 1969 | 163,000 | Fair |
| Nj Tpk(i-95) over Cedar Swamp Brook | 1950 | 128,068 | Fair |
| US 1 over Duck Pond Run | 1928 | 120,147 | Fair |
| I-295 Southbound over Franklin Corner Road | 1973 | 100,463 | Fair |
| Nj Tpk (I-95) over Nj 33 | 1950 | 99,482 | Fair |
| Nsi & Sni Roadways over Monmouth Street | 1950 | 99,482 | Fair |
All bridges nearby: Mercer County, NJ bridge conditions · every bridge in Mercer County · New Jersey bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.