US-23 over Cheboygan River

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

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

• US-23 over Cheboygan River in Cheboygan County, Michigan, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
• It was built in 1940 and reconstructed in 2003, making it 85 years old at the 2025 inventory.
• It carries about 7,273 vehicles a day (traffic count year 2021).
• Its listed owner is the state highway agency.
• It is one of 45 of the 73 inventoried bridges in Cheboygan County rated fair (61.6%); 10 (13.7%) are rated poor.
• Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
• Its class is unchanged from 2024 (fair), but component ratings moved: substructure 6 to 5.
• Its most recent inspection on record is dated May 2024, on a 24-month routine inspection cycle.
• It is coded scour critical (NBI item 113 = 3): scour critical: foundations unstable for the assessed or calculated scour.
• It has fracture-critical members (NBI item 92A): steel tension members without a redundant load path, which get their own scheduled inspections.
• 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 → (45.64586, -84.47254)

Component ratings

Bridge details

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

Busiest bridges in Cheboygan County

All bridges nearby: Cheboygan County, MI bridge conditions · every bridge in Cheboygan County · Michigan bridges.

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