Mapleton Road over Heathcote Brook
Middlesex County, New Jersey · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Mapleton Road over Heathcote Brook in Middlesex County, New Jersey, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 2001, making it 24 years old at the 2025 inventory.
- It carries about 4,682 vehicles a day (traffic count year 2023).
- Its listed owner is the county highway agency.
- It is one of 130 of the 563 inventoried bridges in Middlesex County rated good (23.1%); 24 (4.3%) 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 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 → (40.36997, -74.61578)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 61 ft |
| Location | 0.25 Mi. S. of N.j. 27 |
| NBI structure number | 124B068 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 2023 |
| Inspection interval (item 91) | 24 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 New Jersey department of transportation.
Busiest bridges in Middlesex County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Tpknso/nsi/sni/sno over Colonial Pipelines | 1947 | 196,710 | Good |
| Garden St Parkway over S Br Rahway River | 1948 | 194,231 | Fair |
| Washington Ave over I-287 | 1962 | 190,050 | Fair |
| Nj Turnpike(i-95) over Mill Brook | 1950 | 175,389 | Fair |
| Nj Turnpike(i-95) over Mill Brook | 1950 | 175,376 | Fair |
| Nj Turnpike(i-95) over Mill Brook | 1950 | 175,376 | Fair |
All bridges nearby: Middlesex County, NJ bridge conditions · every bridge in Middlesex County · New Jersey bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.