Pa Tpk (I-76) over T-570
Dauphin County, Pennsylvania · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Pa Tpk (I-76) over T-570 in Dauphin County, Pennsylvania, 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 1949, making it 76 years old at the 2025 inventory.
- It carries about 24,423 vehicles a day (traffic count year 2001).
- It is one of 96 of the 448 inventoried bridges in Dauphin County rated good (21.4%); 41 (9.2%) 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 → (40.20737, -76.59436)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 8 | Very good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Concrete tee beam |
| Length | about 25 ft |
| Location | Conewago Twp |
| NBI structure number | 000000000014626 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Pennsylvania department of transportation.
Busiest bridges in Dauphin County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-83; SR 0083 over Twp Rd 369 & Sprng Crk.r | 1953 | 91,219 | Fair |
| I-83; SR 0083 over Twp Rd 392 Peiffer Lane | 1994 | 91,219 | Fair |
| SR 0083; I-83 over Susq.river;r.r.lowther S | 1960 | 89,499 | Poor |
| I-83; SR 0083 over Pa 230;NS;RP B C;front | 1960 | 89,209 | Fair |
| I-83; SR 0083 over T-411; Londonderry Rd | 2021 | 84,491 | Good |
| I-83; SR 0083 over T-586; Megoulas Blvd. | 2021 | 84,491 | Good |
All bridges nearby: Dauphin County, PA bridge conditions · every bridge in Dauphin County · Pennsylvania bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.