Bridge conditions in Arenac County, Michigan
80 inventoried bridges · 12 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Of the 80 Arenac County bridges in the federal inventory, 12 carry a poor rating. That 15.0% share is roughly 2x the national average.
- 12 of the 80 bridges in Arenac County, Michigan, are rated in poor condition (15.0%) in the 2025 National Bridge Inventory, as of .
- 25 bridges (31.2%) are rated good and 43 (53.8%) fair.
- The median Arenac County bridge was built in 1968.
- The busiest poor-rated bridge is Sterling Road over I-75 NB (built 1968), carrying about 14,350 vehicles a day.
Good 31.2% · Fair 53.8% · Poor 15.0% of 80 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Sterling Road over I-75 NB | 1968 | 14,350 | Poor |
| I-75 SB over N Branch Pine River | 1968 | 7,138 | Poor |
| M-61 over M Br Pine River | 1952 | 4,242 | Poor |
| M-61 over M Br Pine River | 1952 | 4,242 | Poor |
| M-33 over Lake State RR & Old M-76 | 1968 | 4,124 | Poor |
| M-33|alger Rd over I-75 NB | 1968 | 4,124 | Poor |
| Old M-76 over North Br Pine River | 1932 | 2,554 | Poor |
| Foco Road over N Br Pine River | 1974 | 235 | Poor |
| Mackinaw Road over Augres River | 1985 | 200 | Poor |
| Kraushaar Road over Pine River | 1993 | 100 | Poor |
| Black Road over Big Creek A Drain | 1917 | 30 | Poor |
| Lentner Road over Big Creek A Drain | 1917 | 5 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-75 Nb|us-23 NB over Sunsmith Drain | 1968 | 27,470 | Fair |
| US-23|MAIN St over Middle Br Pine River | 1994 | 14,971 | Fair |
| Sterling Road over I-75 NB | 1968 | 14,350 | Poor |
| I-75 Sb|us-23 SB over S Br Pine River | 1968 | 13,735 | Fair |
| I-75 Nb|us-23 NB over S Br Pine River | 1968 | 13,735 | Fair |
| US-23|W Huron Rd over N Br Pine River | 2001 | 9,170 | Good |
| US-23|W Huron Rd over Saverine Creek | 2000 | 9,170 | Good |
| US-23|CENTER Ave over Rifle River | 1972 | 8,450 | Fair |
| I-75 SB over M-61 | 1968 | 8,140 | Fair |
| I-75 NB over M-61 | 1968 | 8,140 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Michigan: Michigan bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.