T-339 Langmaid Ln over Marilla Creek

McKean County, Pennsylvania · rated Good in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

• T-339 Langmaid Ln over Marilla Creek in McKean County, Pennsylvania, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the substructure, rated 7 (good condition) on the 0-9 scale.
• It was built in 2016, making it 9 years old at the 2025 inventory.
• It carries about 400 vehicles a day (traffic count year 2018).
• Its listed owner is a town or township highway agency.
• It is one of 101 of the 226 inventoried bridges in McKean County rated good (44.7%); 40 (17.7%) 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 → (41.9412, -78.6802)

Component ratings

Bridge details

Source: FHWA National Bridge Inventory, 2025 data as reported by the Pennsylvania department of transportation.

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Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.