I840 over I840 / SR 100

Williamson County, Tennessee · rated Good in the 2025 National Bridge Inventory

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

• I840 over I840 / SR 100 in Williamson County, Tennessee, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
• It was built in 2009, making it 16 years old at the 2025 inventory.
• It carries about 14,056 vehicles a day (traffic count year 2021).
• Its listed owner is the state highway agency.
• It is one of 341 of the 531 inventoried bridges in Williamson County rated good (64.2%); 16 (3.0%) are rated poor.
• Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
• Its class is unchanged from 2024 (good), but component ratings moved: deck 8 to 7.
• Its most recent inspection on record is dated November 2024, 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 → (35.93973, -87.19037)

Component ratings

Bridge details

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

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