County profile · official public datasets

Saginaw County, MI

315 public highway bridges tracked in the FHWA National Bridge Inventory: 28.9% rated Good, 52.7% Fair, 18.4% Poor.

315
Public bridges
28.9%
Good condition
18.4%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Saginaw County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.

72nd
of 83 on Poor share
18.4%
Poor-condition share
315
public highway bridges
1979
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.

Saginaw County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Saginaw County ranks #72 of 83 Michigan counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 18.4%). Saginaw County, Michigan contains 315 public highway bridges. Roughly 28.9% are rated “Good,” 52.7% “Fair,” and 18.4% “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.

Total bridges

315

Public highway bridges in Saginaw County

Good condition

28.9%

91 of 315 rated 7-9

Fair condition

52.7%

166 of 315 rated 5-6

Poor condition

18.4%

58 of 315 rated 4 or below

In-state Poor-share rank

#72 of 83

Among Michigan counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 315 NBI-tracked bridges by lowest applicable component rating.

Good
28.9% (91)
Fair
52.7% (166)
Poor
18.4% (58)

Saginaw County's Poor-condition bridges carry 63,494 vehicle crossings a day

That is 3.8% of the county's reported daily bridge traffic on 18.2% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,114 crossings a day against 6,745 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 313 of 315 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

45.4% of Saginaw County's bridges have passed the 50-year mark

143 of the 315 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 28.9% 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 26.1% of the county's Poor-condition bridge traffic

GENESEE AVE over SAGINAW RIVER, built 1973, carries 16,546 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 58-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 63,494 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Saginaw County's bridges were built

315 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1970s, when 75 of the county's bridges still in the inventory were built, which is 23.8% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year (1979) matches the Michigan average (1976).

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

How Saginaw County compares with Michigan's closest counties by inventory size

The 5 Michigan counties nearest Saginaw County in number of bridges, with their condition splits. Its 18.4% Poor share is the 5th-lowest of these 6. Its average build year of 1979 against a peer-group mean of 1976 is in line with the group.

Showing the 5 closest of 82 Michigan counties eligible for comparison.

Bridge inventory size and condition shares for Saginaw County and the 5 Michigan counties closest to it in inventory size
County Bridges Poor
Genesee County 371 15.4%
St. Clair County 327 8.3%
Saginaw County (this page) 315 18.4%
Monroe County 297 15.5%
Berrien County 272 5.9%
Washtenaw County 262 20.2%

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 Saginaw 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 Saginaw County, both outside Michigan so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside MI (315 bridges here).

Similar average build year

Nearest mean year-built outside MI (1979 here).

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 315 Good 91 Fair 166 Poor 58

All bridges (315)

PEET ROAD

Good

Over: LAMB CREEK

0.7 MI E OF STEEL ROAD, Saginaw, MI

Built 2016 Load: 59.0 t ADT: 183

PRUESS ROAD

Good

Over: MCCLELLAN RUN DRAIN

0.1 MI N OF GEDDES ROAD, Saginaw, MI

Built 2013 Load: 59.9 t ADT: 38

FORDNEY ROAD

Good

Over: WHITMORE DRAIN

0.9 MI N OF DICE ROAD, Saginaw, MI

Built 2008 Load: 60.6 t ADT: 2,075

M-46

Good

Over: PLANK ROAD #16 DRAIN

1.5 MI EAST OF MERRILL, Saginaw, MI

Built 2018 Load: 61.2 t ADT: 6,100

CENTER ROAD

Good

Over: TITTABAWASSEE RIVER

0.3 MI N OF STROEBEL RD, Saginaw, MI

Built 2009 Load: 62.0 t ADT: 6,247

RING ROAD

Good

Over: BIG POTATO CREEK

0.9 MI E OF BRENNAN ROAD, Saginaw, MI

Built 2001 Load: 65.1 t ADT: 20

HEMLOCK ROAD

Good

Over: SOUTH BRANCH BAD RIVER

0.5 MI N OF MARION ROAD, Saginaw, MI

Built 1954 Load: 70.3 t ADT: 2,529

BUECHE ROAD

Poor

Over: PATTIECREEK

0.5 MI N OF FRY ROAD, Saginaw, MI

Built 1959 Load: 0.0 t ADT: 44

SCHULTZ RD

Poor

Over: WHITMORE DRAIN

0.1 MI N OF PANGBORN ROAD, Saginaw, MI

Built 1910 Load: 2.6 t ADT: 10

THOMAS ROAD

Poor

Over: WILLIAMS CREEK DRAIN

0.3 MI N OF SCHOMAKER RD, Saginaw, MI

Built 1977 Load: 6.5 t ADT: 1,158

STEEL ROAD

Poor

Over: BIG POTATO CREEK

0.4 MI N OF BRANT ROAD, Saginaw, MI

Built 1920 Load: 7.1 t ADT: 42

SCHROEDER ROAD

Poor

Over: BIG POTATO CREEK

0.1 MI E OF FENMORE ROAD, Saginaw, MI

Built 1916 Load: 7.2 t ADT: 39

BRENNAN ROAD

Poor

Over: SOUTH BRANCH BAD RIVER

0.9 MI N OF BURT ROAD, Saginaw, MI

Built 1898 Load: 10.0 t ADT: 99

MOWER ROAD

Poor

Over: COLE DRAIN

0.4 MI N OF CURTIS ROAD, Saginaw, MI

Built 1920 Load: 10.7 t ADT: 116

CHESANING ROAD

Poor

Over: MISTEGUAY CREEK

0.8 MI E OF BUECHE ROAD, Saginaw, MI

Built 1974 Load: 11.3 t ADT: 603

SCHOMAKER ROAD

Poor

Over: SWAN CREEK

0.6 MI E OF S THOMAS ROAD, Saginaw, MI

Built 1974 Load: 12.6 t ADT: 298

MCKEIGHAN ROAD

Poor

Over: PICKEREL CREEK

0.9 MI N OF FERGUS ROAD, Saginaw, MI

Built 1973 Load: 14.9 t ADT: 900

MOORISH ROAD

Poor

Over: PINE RUN CREEK

0.1 MI N OF GARY ROAD, Saginaw, MI

Built 1931 Load: 14.9 t ADT: 176

KNIGHT ROAD

Poor

Over: CHEBOYGANING CREEK

0.5 MI N OF UNCLE HENRY, Saginaw, MI

Built 1973 Load: 17.8 t ADT: 480

TEFT ROAD

Poor

Over: MARSH CREEK

0.3 MI N OF LAKEFIELD RD, Saginaw, MI

Built 1973 Load: 18.1 t ADT: 207

BIRCH RUN ROAD

Poor

Over: FAIRCHILD CREEK

0.9 MI E OF BISHOP ROAD, Saginaw, MI

Built 1974 Load: 18.5 t ADT: 162

BEYER ROAD

Poor

Over: DEAD CREEK

0.1 MI N OF WARNICK ROAD, Saginaw, MI

Built 1973 Load: 18.8 t ADT: 499

COLE ROAD

Poor

Over: BIRCH RUN CREEK

1.3 MI N OF FRY ROAD, Saginaw, MI

Built 1910 Load: 18.8 t ADT: 7

MORSEVILLE RD

Poor

Over: PINE RUN CREEK

0.2 MI N OF BIRCH RUN RD, Saginaw, MI

Built 1957 Load: 19.9 t ADT: 405

CHAPIN ROAD

Poor

Over: LAMB CREEK

0.1 MI N OF RIDGE ROAD, Saginaw, MI

Built 1916 Load: 20.7 t ADT: 675

BLOCK ROAD

Poor

Over: CHEBOYGANING CREEK

1.0 MI N OF HOLLAND ROAD, Saginaw, MI

Built 1960 Load: 21.4 t ADT: 433

DORWOOD ROAD

Poor

Over: BIRCH RUN CREEK

0.5 MI N OF BUSCH ROAD, Saginaw, MI

Built 1973 Load: 21.6 t ADT: 467

BUECHE ROAD

Poor

Over: NORTHWOOD DRAIN

0.3 MI N OF CHESANING RD, Saginaw, MI

Built 1926 Load: 22.0 t ADT: 67

WADSWORTH RD

Poor

Over: I-75

1.0 MI S OF M-81, Saginaw, MI

Built 1961 Load: 22.4 t ADT: 360

MOORE ROAD

Poor

Over: COLE DRAIN

0.1 MI E OF CRESSWELL RD, Saginaw, MI

Built 1924 Load: 22.4 t ADT: 39

WICKIE ROAD

Poor

Over: LAMB CREEK

0.9 MI E OF STEEL ROAD, Saginaw, MI

Built 1973 Load: 22.7 t ADT: 38

SHARON ROAD

Poor

Over: DEER CREEK

0.4 MI N OF GARY ROAD, Saginaw, MI

Built 1987 Load: 23.0 t ADT: 540

GARY ROAD

Poor

Over: MITCHELL CREEK

0.1 MI E OF LITCHFIELD, Saginaw, MI

Built 1995 Load: 24.5 t ADT: 914

STEVENS ROAD

Poor

Over: BIG POTATO CREEK

0.6 MI N OF BRANT ROAD, Saginaw, MI

Built 1920 Load: 24.6 t ADT: 45

TOWNLINE ROAD

Poor

Over: DEAD CREEK

0.4 MI E OF S GERA ROAD, Saginaw, MI

Built 1973 Load: 24.6 t ADT: 195

BALDWIN ROAD

Poor

Over: GRIFFUS CREEK

0.99 MI E OF FOWLER ROAD, Saginaw, MI

Built 2000 Load: 24.9 t ADT: 63

SCHROEDER ROAD

Poor

Over: BIG POTATO CREEK

0.1 MI E OF MERRILL ROAD, Saginaw, MI

Built 1975 Load: 24.9 t ADT: 187

JANES ROAD

Poor

Over: UNCLE HENRY DRAIN

1.1 MI E OF PORTSMOUTH RD, Saginaw, MI

Built 1980 Load: 25.3 t ADT: 170

RYAN ROAD

Poor

Over: PICKERAL CREEK

0.8 MI E OF SHARON ROAD, Saginaw, MI

Built 1920 Load: 25.9 t ADT: 51

BELL ROAD

Poor

Over: BIRCH RUN CREEK

0.7 MI N OF BUSCH ROAD, Saginaw, MI

Built 1936 Load: 27.2 t ADT: 1,027

BECKER ROAD

Poor

Over: CHEBOYGANING CREEK

0.4 MI E OF PORTSMOUTH RD, Saginaw, MI

Built 1960 Load: 28.5 t ADT: 528

CENTER STREET

Poor

Over: SAGINAW RIVER

IN CITY OF SAGINAW, Saginaw, MI

Built 1975 Load: 28.8 t ADT: 7,625

BRENNAN ROAD

Poor

Over: BIG POTATO CREEK

0.9 MI N OF BRANT ROAD, Saginaw, MI

Built 1973 Load: 29.2 t ADT: 95

GENESEE AVE

Poor

Over: SAGINAW RIVER

IN CITY OF SAGINAW, Saginaw, MI

Built 1973 Load: 29.2 t ADT: 16,546

BUECHE ROAD

Poor

Over: NORTHWOOD CREEK

0.1 MI N OF FERDEN ROAD, Saginaw, MI

Built 1973 Load: 31.8 t ADT: 389

FERGUS ROAD

Poor

Over: MISTEGUAY CREEK

1.8 MI E OF BISHOP ROAD, Saginaw, MI

Built 1947 Load: 32.1 t ADT: 1,752

COURTNEY ROAD

Poor

Over: PINE RUN CREEK

0.7 MI E OF MARSHALL ROAD, Saginaw, MI

Built 1967 Load: 32.1 t ADT: 106

DAVIS PARK

Poor

Over: CASS RIVER OVERFLOW

DAVIS PARK, Saginaw, MI

Built 1979 Load: 33.0 t ADT: 6

E CURTIS RD

Poor

Over: I-75

8.3 MI NW OF GENESEE COL, Saginaw, MI

Built 1961 Load: 33.7 t ADT: 1,706

CHAPIN ROAD

Poor

Over: LIMBOCKER DRAIN

1.0 MI N OF BALDWIN ROAD, Saginaw, MI

Built 1973 Load: 34.0 t ADT: 185

Read our methodology - how this data is sourced, computed, and verified.

Related

Browse all → | Rankings →
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.