US-23 Ent Ramp B over Under M-14(ov US-23 NB)

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

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

• US-23 Ent Ramp B over Under M-14(ov US-23 NB) in Washtenaw County, Michigan, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
• It was built in 1964, making it 61 years old at the 2025 inventory.
• It carries about 2,700 vehicles a day (traffic count year 1993).
• Its listed owner is the state highway agency.
• It is one of 151 of the 262 inventoried bridges in Washtenaw County rated fair (57.6%); 47 (17.9%) are rated poor.
• 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 → (42.32261, -83.69012)

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.