SR 4020(LR 48059) over Bertsch Creek
Northampton County, Pennsylvania · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR 4020(LR 48059) over Bertsch Creek in Northampton County, Pennsylvania, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1889 and reconstructed in 2017, making it 136 years old at the 2025 inventory.
- It carries about 1,238 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 212 of the 354 inventoried bridges in Northampton County rated fair (59.9%); 29 (8.2%) 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 → (40.75652, -75.57695)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 9 | 9 | Excellent condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Masonry deck arch |
| Length | about 44 ft |
| Location | Maple Dr. @ Birch Rd. |
| NBI structure number | 000000000028792 |
| 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) | 7: scour countermeasures installed |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Pennsylvania department of transportation.
Busiest bridges in Northampton County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 22 (lr 772) over Pa 512(LR 48046) | 1954 | 94,431 | Fair |
| US 22 (lr 772) over Twp.line Rd.(t-434) | 1954 | 94,335 | Fair |
| US 22 (lr 772) over Christian Spring Rd. | 1954 | 94,335 | Fair |
| US 22 (lr 772) over Norfolk Southern RR | 1954 | 94,335 | Fair |
| US 22 (lr 772) over Pa 191 & Monocacy CR. | 1954 | 94,335 | Fair |
| US 22 (lr 772) over T-575(jacksonville Road) | 1954 | 89,021 | Fair |
All bridges nearby: Northampton County, PA bridge conditions · every bridge in Northampton County · Pennsylvania bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.