Isabella County, MI
12 public highway bridges
Isabella County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Isabella County, Michigan contains 12 public highway bridges. Roughly 58.3% are rated “Good,” 33.3% “Fair,” and 8.3% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.
Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.
Source: FHWA National Bridge Inventory. See methodology for full definitions.
Condition Distribution
All Bridges (12)
WALTON ROAD
FairOver: SOUTH BR PINE RIVER
ROLLAND TWP SEC 3/10, Isabella, MI
IRR BIA RTE 12
FairOver: NEFF EXTENSION DRAIN
SAGINAW CHIPPEWA RES., Isabella, MI
IRR BIA RTE 11
FairOver: ONION CREEK DRAIN
SAGINAW CHIPPEWA RES., Isabella, MI
VANDECAR ROAD
FairOver: SOUTH BR CHIPPEWA RIVER
SEC 22-23 DEERFIELD TWP, Isabella, MI
BATTLE ROAD
GoodOver: N BR SALT RIVER
650 FT E LOOMIS ROAD, Isabella, MI
WALTON ROAD
GoodOver: PONY CREEK
ROLLAND TWP SEC 3/10, Isabella, MI
SUMMERTON ROAD
GoodOver: LITTLE SALT RIVER
0.5 MI S OF COE RD, Isabella, MI
WEIDMAN ROAD
GoodOver: NORTH BR CHIPPEWA RIVER
0.4M E NW COR SEC 24 T15N, Isabella, MI
REMUS ROAD
GoodOver: ONION CREEK
400 FT E OF WISE ROAD, Isabella, MI
SUMMERTON ROAD
GoodOver: LEWIS DRAIN
0.6 MI S OF WEIDMAN ROAD, Isabella, MI
TTP BIA 1011
GoodOver: ONION CREEK
SAGINAW CHIPPEWA RES., Isabella, MI
LEATON ROAD
PoorOver: JORDAN CREEK
0.37 MI S BEAL CITY ROAD, Isabella, MI
Read our methodology - how this data is sourced, computed, and verified.
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Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.