Arf-aff Range Road over Portage Creek
Kalkaska County, Michigan · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Arf-aff Range Road over Portage Creek in Kalkaska County, Michigan, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1999, making it 26 years old at the 2025 inventory.
- It carries about 50 vehicles a day (traffic count year 2017).
- It is one of 7 of the 15 inventoried bridges in Kalkaska County rated good (46.7%); 1 (6.7%) are rated poor.
- 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 → (44.6433, -84.8841)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Timber slab |
| Length | about 35 ft |
| Location | 1.2 Mi N of Howe Road |
| NBI structure number | 000000000013997 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Michigan department of transportation.
Busiest bridges in Kalkaska County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Us-131|m-66|m-72|s over N Br Boardman River | 1940 | 8,567 | Fair |
| N Rapid City Road over Rapid River | 1983 | 5,800 | Good |
| Boardman Road over Boardman River | 1988 | 1,700 | Fair |
| Aarwood Road over Rapid River | 2012 | 1,340 | Good |
| M-66 over Manistee River | 1979 | 1,150 | Fair |
| W Sharon Road over Manistee River | 1958 | 1,060 | Good |
All bridges nearby: Kalkaska County, MI bridge conditions · every bridge in Kalkaska County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.