Sibley Road (east) over Letts Creek

Washtenaw County, Michigan · rated Poor in the 2025 National Bridge Inventory

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

• Sibley Road (east) over Letts Creek in Washtenaw County, Michigan, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the culvert, rated 3 (serious condition) on the 0-9 scale.
• It was built in 1968, making it 57 years old at the 2025 inventory.
• It carries about 200 vehicles a day (traffic count year 2014).
• Its listed owner is the county highway agency.
• It is one of 47 of the 262 inventoried bridges in Washtenaw County rated poor (17.9%); 47 (17.9%) are rated poor.
• A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

View this bridge on a map → (42.32425, -84.03611)

Component ratings

Bridge details

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

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