Total bridges
242
Public highway bridges in Tuscola County
County profile · official public datasets
Tuscola County, MI
242 public highway bridges tracked in the FHWA National Bridge Inventory: 33.9% rated Good, 61.2% Fair, 5% Poor.
- 242
- Public bridges
- 33.9%
- Good condition
- 5%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Tuscola County posts a top-quartile lowest Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- Top 11%
- lowest Poor share in state
- 5%
- Poor-condition share
- 242
- public highway bridges
- 1980
- avg year built
Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.
Tuscola County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Tuscola County ranks #9 of 83 Michigan counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 5%). Tuscola County, Michigan contains 242 public highway bridges. Roughly 33.9% are rated “Good,” 61.2% “Fair,” and 5% “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.
Good condition
33.9%
82 of 242 rated 7-9
Fair condition
61.2%
148 of 242 rated 5-6
Poor condition
5%
12 of 242 rated 4 or below
In-state Poor-share rank
#9 of 83
Among Michigan counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 242 NBI-tracked bridges by lowest applicable component rating.
Good 33.9% (82)
Fair 61.2% (148)
Poor 5% (12)
Tuscola County's Poor-condition bridges carry 20,782 vehicle crossings a day
That is 8.1% of the county's reported daily bridge traffic on 5% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 1,732 crossings a day against 1,031 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.
Computed over the 242 of 242 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
40.1% of Tuscola County's bridges have passed the 50-year mark
97 of the 242 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 33.9% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.
Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.
One structure carries 32.2% of the county's Poor-condition bridge traffic
M-46 over CHEBOYGAN & BRANCHES DRN, built 1939, carries 6,701 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 12-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 20,782 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Tuscola County's bridges were built
242 bridges with a recorded construction year, grouped by decade
- 1920s 2
1920–1929
2 bridges
- 1930s 11
1930–1939
11 bridges
- 1940s 4
1940–1949
4 bridges
- 1950s 3
1950–1959
3 bridges
- 1960s
1960–1969
39 bridges
- 1970s
1970–1979
70 bridges
- 1980s
1980–1989
46 bridges
- 1990s
1990–1999
28 bridges
- 2000s 18
2000–2009
18 bridges
- 2010s 18
2010–2019
18 bridges
- 2020s 3
2020–2029
3 bridges
What this shows Construction peaked in the 1970s, when 70 of the county's bridges still in the inventory were built, which is 28.9% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year (1980) matches the Michigan average (1976).
How Tuscola County compares with Michigan's closest counties by inventory size
The 5 Michigan counties nearest Tuscola County in number of bridges, with their condition splits. Its 5% Poor share is the 1st-lowest of these 6. Its average build year of 1980 against a peer-group mean of 1977 is in line with the group.
Showing the 5 closest of 82 Michigan counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Washtenaw County | 262 | 23.3% | 56.5% | 20.2% | 1975 |
| Ottawa County | 254 | 40.9% | 52.8% | 6.3% | 1977 |
| Allegan County | 244 | 24.2% | 59% | 16.8% | 1978 |
| Tuscola County (this page) | 242 | 33.9% | 61.2% | 5% | 1980 |
| Ingham County | 241 | 15.8% | 68.9% | 15.4% | 1972 |
| Lenawee County | 225 | 47.6% | 39.6% | 12.9% | 1981 |
Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Tuscola County's. Source: FHWA National Bridge Inventory, 2024 release.
Nationwide counties with similar inventory size or average build year
Two NBI-derived peer sets for Tuscola County, both outside Michigan so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MI (242 bridges here).
- Glenn County, CA · 242 bridges
- Macoupin County, IL · 242 bridges
- Wabaunsee County, KS · 242 bridges
- Kings County, NY · 242 bridges
Similar average build year
Nearest mean year-built outside MI (1980 here).
- Tulsa County, OK · avg 1980 · 1,135 bridges
- Miami-Dade County, FL · avg 1980 · 1,057 bridges
- Pulaski County, AR · avg 1980 · 721 bridges
- McLennan County, TX · avg 1980 · 714 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Good-condition bridges (82)
REED ROAD
GoodOver: NORTH BR CASS RIVER
SEC 13-24 ELKLAND TWP, Tuscola, MI
Built 2009 Load: 16.8 t ADT: 60
PHILLIPS ROAD
GoodOver: SOUTH BR WHITE CREEK
SEC 7 KINGSTON TWP, Tuscola, MI
Built 1968 Load: 21.4 t ADT: 50
ROSSMAN ROAD
GoodOver: S. O. DRAIN
SEC 29-32 WELLS TWP, Tuscola, MI
Built 1978 Load: 21.7 t ADT: 120
M-24
GoodOver: GILBERT BR WISCOGGIN DRN
3.0 MI EAST OF AKRON, Tuscola, MI
Built 1984 Load: 24.3 t ADT: 1,825
SHREEVES ROAD
GoodOver: ALLEN EXTN DRAIN
SEC 16 FAIRGROVE TWP, Tuscola, MI
Built 1967 Load: 26.6 t ADT: 220
WELLS ROAD
GoodOver: S. O. DRAIN
SEC 32 WELLS TWP, Tuscola, MI
Built 1986 Load: 26.6 t ADT: 50
PHILLIPS ROAD
GoodOver: WHITE CREEK I/C DRAIN
SEC 19-20 NOVESTA TWP, Tuscola, MI
Built 1973 Load: 30.8 t ADT: 680
CEMETERY ROAD
GoodOver: WHITE CREEK I/C DRAIN
SEC 21-22 NOVESTA TWP, Tuscola, MI
Built 1986 Load: 31.1 t ADT: 2,370
MUSHROOM ROAD
GoodOver: SOUTH BR WHITE CREEK
SEC 6-7 KINGSTON TWP, Tuscola, MI
Built 1978 Load: 31.4 t ADT: 40
SHABBONA ROAD
GoodOver: WHITE CREEK I/C DRAIN
SEC 19-30 NOVESTA TWP, Tuscola, MI
Built 1972 Load: 32.1 t ADT: 335
WASHBURN ROAD
GoodOver: SCOTT DRAIN
SEC 31 INDIANFIELDS TWP, Tuscola, MI
Built 1979 Load: 32.4 t ADT: 50
M-24
GoodOver: KREGER DRAIN
2.0 MI NW OF MAYVILLE LTS, Tuscola, MI
Built 1941 Load: 32.7 t ADT: 4,188
DICKERSON ROAD
GoodOver: LATIMER OR ALLEN RELIEF
SEC 17-20 AKRON TWP, Tuscola, MI
Built 2009 Load: 32.7 t ADT: 1,300
VASSAR ROAD
GoodOver: GOODING CREEK
SEC 13 TUSCOLA TWP, Tuscola, MI
Built 1987 Load: 32.7 t ADT: 1,440
ELMWOOD ROAD
GoodOver: ALLEN DRAIN
SEC 29-32 AKRON TWP, Tuscola, MI
Built 1992 Load: 32.7 t ADT: 225
TURNER ROAD
GoodOver: SUCKER CREEK DRAIN
SEC 11-12 DAYTON TWP, Tuscola, MI
Built 2003 Load: 32.7 t ADT: 70
ALLEN ROAD
GoodOver: SOUTHGATE DRAIN
SEC 6-7 AKRON TWP, Tuscola, MI
Built 1998 Load: 32.7 t ADT: 27
CARSON ROAD
GoodOver: SOUTHGATE DRAIN
SEC 7-18 AKRON TWP, Tuscola, MI
Built 1998 Load: 32.7 t ADT: 50
CASS CITY ROAD
GoodOver: ALLEN DRAIN #1
SEC 20-29 AKRON TWP, Tuscola, MI
Built 2010 Load: 32.8 t ADT: 75
THOMAS ROAD
GoodOver: ALLEN EXT DRAIN
SEC 32-33 AKRON TWP, Tuscola, MI
Built 2014 Load: 32.9 t ADT: 175
BIRCH RUN ROAD
GoodOver: THETFORD-ARBELA I/C DRN
SEC 23-26 ARBELA TWP, Tuscola, MI
Built 1978 Load: 33.4 t ADT: 3,540
VAN GEISEN ROAD
GoodOver: NORTHWEST DRAIN
SEC 2 DENMARK TWP, Tuscola, MI
Built 1998 Load: 33.4 t ADT: 90
WATERMAN ROAD
GoodOver: EVERGREEN CREEK
SEC 1 VASSAR TWP, Tuscola, MI
Built 1992 Load: 33.5 t ADT: 120
CASS CITY ROAD
GoodOver: WISCOGGIN DRAIN
SEC 24-25 AKRON TWP, Tuscola, MI
Built 1984 Load: 34.0 t ADT: 78
FOSTORIA ROAD
GoodOver: BR EVERGREEN CREEK
SEC 23-24 WATERTOWN TWP, Tuscola, MI
Built 1991 Load: 34.3 t ADT: 1,420
GOODRICH ROAD
GoodOver: FOSTORIA DRAIN
SEC 26-35 WATERTOWN TWP, Tuscola, MI
Built 1994 Load: 34.3 t ADT: 105
BEVENS ROAD
GoodOver: SUCKER CREEK
SEC 17-20 WELLS TWP, Tuscola, MI
Built 1992 Load: 34.7 t ADT: 1,880
M-15
GoodOver: CASS RIVER
IN VASSAR, Tuscola, MI
Built 2015 Load: 35.3 t ADT: 14,550
CENTERLINE ROAD
GoodOver: MURDICK-VANSICKLAND DRN
SEC 15-22 KOYLTON TWP, Tuscola, MI
Built 1993 Load: 35.5 t ADT: 90
PIKE ROAD
GoodOver: CENTER LINE DRAIN
SEC 20 GILFORD TWP, Tuscola, MI
Built 2020 Load: 35.6 t ADT: 24
BAY PARK ROAD
GoodOver: ALLEN DRAIN
SEC 5 AKRON TWP, Tuscola, MI
Built 1972 Load: 37.3 t ADT: 412
WHITE CREEK ROAD
GoodOver: WHITE CREEK DRAIN #2
SEC 1-2 KOYLTON TWP, Tuscola, MI
Built 1993 Load: 37.3 t ADT: 600
VASSAR ROAD
GoodOver: PERRY CREEK
SEC 7 MILLINGTON TWP, Tuscola, MI
Built 1985 Load: 38.0 t ADT: 1,690
VASSAR ROAD
GoodOver: NORTHWEST DRAIN
SEC 18 FAIRGROVE TWP, Tuscola, MI
Built 1971 Load: 38.2 t ADT: 650
M-25
GoodOver: QUANICASSEE RIVER
0.8 MI E OF BAY CO LINE, Tuscola, MI
Built 2013 Load: 38.6 t ADT: 5,571
ELMWOOD ROAD
GoodOver: NORTH BR CASS RIVER
SEC 34 ELKLAND TWP, Tuscola, MI
Built 2003 Load: 38.9 t ADT: 215
DICKERSON ROAD
GoodOver: ALLEN DRAIN
SEC 17-20 AKRON TWP, Tuscola, MI
Built 1971 Load: 39.2 t ADT: 1,300
VAN BUREN ROAD
GoodOver: BR 1 SQUAW CK-GILFORD DN
SEC 31-32 GILFORD TWP, Tuscola, MI
Built 1980 Load: 39.2 t ADT: 450
CRAWFORD ROAD
GoodOver: WHITE CREEK I/C DRAIN
SEC 23-34 NOVESTA TWP, Tuscola, MI
Built 1994 Load: 39.2 t ADT: 130
HOPPE ROAD
GoodOver: WISCOGGIN DAIRN
SEC 12-13 AKRON TWP, Tuscola, MI
Built 1986 Load: 39.3 t ADT: 115
LOREN ROAD
GoodOver: PERRY CREEK
SEC 28 TUSCOLA TWP, Tuscola, MI
Built 2006 Load: 39.5 t ADT: 300
RINGLE ROAD
GoodOver: ALLEN EXTN DRAIN
SEC 15-16 FAIRGROVE TWP, Tuscola, MI
Built 1979 Load: 40.2 t ADT: 345
RINGLE ROAD
GoodOver: WISCOGGIN DRAIN
SEC 15-16 AKRON TWP, Tuscola, MI
Built 1996 Load: 41.5 t ADT: 225
CEMETERY ROAD
GoodOver: WHITE CREEK DRAIN #2
SEC 27-28 KINGSTON TWP, Tuscola, MI
Built 1996 Load: 41.5 t ADT: 105
ALBIN ROAD
GoodOver: SUCKER CREEK
SEC 1 INDIANFIELDS TWP, Tuscola, MI
Built 1990 Load: 43.1 t ADT: 185
THOMAS ROAD
GoodOver: WISCOGGIN DRAIN
SEC 16-17 AKRON TWP, Tuscola, MI
Built 1984 Load: 43.7 t ADT: 205
ELMWOOD ROAD
GoodOver: NORTHWEST DRAIN OUTLET 3
SEC 25-36 WISNER TWP, Tuscola, MI
Built 2000 Load: 43.8 t ADT: 350
CHAMBERS ROAD
GoodOver: CASS RIVER
SEC 20 INDIANFIELDS TWP, Tuscola, MI
Built 2009 Load: 44.4 t ADT: 3,900
M-46
GoodOver: SUCKER CREEK
2.8 MI E OF M-24, Tuscola, MI
Built 2012 Load: 44.4 t ADT: 4,040
LOOMIS ROAD
GoodOver: ALLEN DRAIN
SEC 29-32 AKRON TWP, Tuscola, MI
Built 1999 Load: 45.0 t ADT: 115
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges
Every figure on PlainBridges 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. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.