County profile · official public datasets

Ogemaw County, MI

31 public highway bridges tracked in the FHWA National Bridge Inventory: 22.6% rated Good, 74.2% Fair, 3.2% Poor.

31
Public bridges
22.6%
Good condition
3.2%
Poor condition

The verdict

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

Ogemaw County pairs a top-10% lowest Poor-condition share among rated counties in the state with an older average build year than the state inventory.

Top 8%
lowest Poor share in state
3.2%
Poor-condition share
31
public highway bridges
1969
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.

Ogemaw County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Ogemaw County ranks #7 of 83 Michigan counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 3.2%). Ogemaw County, Michigan contains 31 public highway bridges. Roughly 22.6% are rated “Good,” 74.2% “Fair,” and 3.2% “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

31

Public highway bridges in Ogemaw County

Good condition

22.6%

7 of 31 rated 7-9

Fair condition

74.2%

23 of 31 rated 5-6

Poor condition

3.2%

1 of 31 rated 4 or below

In-state Poor-share rank

#7 of 83

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

Condition distribution

Share of 31 NBI-tracked bridges by lowest applicable component rating.

Good
22.6% (7)
Fair
74.2% (23)
Poor
3.2% (1)

Ogemaw County's Poor-condition bridges carry 643 vehicle crossings a day

That is 0.6% of the county's reported daily bridge traffic on 3.2% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 643 crossings a day against 709 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 31 of 31 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

67.7% of Ogemaw County's bridges have passed the 50-year mark

21 of the 31 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 22.6% 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 100% of the county's Poor-condition bridge traffic

PEACH LAKE RD over W BR RIFLE RIVER, built 1948, carries 643 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 1-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 643 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Ogemaw County's bridges were built

31 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1970s, when 13 of the county's bridges still in the inventory were built, which is 41.9% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year is 1969, 7 years older than the Michigan average of 1976.

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

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

The 5 Michigan counties nearest Ogemaw County in number of bridges, with their condition splits. Its 3.2% Poor share is the 1st-lowest of these 6. Its average build year of 1969 against a peer-group mean of 1974 is 5 years older.

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

Bridge inventory size and condition shares for Ogemaw County and the 5 Michigan counties closest to it in inventory size
County Bridges Poor
Manistee County 35 14.3%
Grand Traverse County 33 6.1%
Alpena County 32 6.3%
Ogemaw County (this page) 31 3.2%
Lake County 30 16.7%
Luce County 28 17.9%

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

Similar inventory size

Nearest county inventories outside MI (31 bridges here).

Similar average build year

Nearest mean year-built outside MI (1969 here).

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

All 31 Good 7 Fair 23 Poor 1

All bridges (31)

FOURTH STREET

Fair

Over: WEST BRANCH RIFLE RIVER

750 FT N OF M-55/M-76, Ogemaw, MI

Built 1940 Load: 25.3 t ADT: 700

RAU ROAD

Fair

Over: I-75 SB

3.0 MI S OF WEST BRANCH, Ogemaw, MI

Built 1970 Load: 30.8 t ADT: 1,609

SCHMITT ROAD

Fair

Over: HOUGHTON CREEK

2 MI E 1 MI S ROSE CITY, Ogemaw, MI

Built 1982 Load: 32.7 t ADT: 214

VALLEY STREET

Fair

Over: WEST BRANCH RIFLE RIVER

1200 FT S OF M-55/M-76, Ogemaw, MI

Built 1973 Load: 32.7 t ADT: 300

SECOND STREET

Fair

Over: WEST BRANCH RIFLE RIVER

350 FT N OF M-55/M-76, Ogemaw, MI

Built 1972 Load: 32.7 t ADT: 200

M-33

Fair

Over: KLACKING CREEK

3.9 MI N OF M-55, Ogemaw, MI

Built 1936 Load: 34.3 t ADT: 4,423

M-55

Fair

Over: AU GRES RIVER

1.4 MI W OF IOSCO CO LINE, Ogemaw, MI

Built 1929 Load: 35.0 t ADT: 3,875

I-75 SB

Fair

Over: SKI PARK RD

3 MI W OF WEST BRANCH, Ogemaw, MI

Built 1972 Load: 35.0 t ADT: 7,368

M-55

Fair

Over: RIFLE RIVER

2.3 MI E OF M-33, Ogemaw, MI

Built 1937 Load: 36.3 t ADT: 6,120

SAGE LAKE RD

Fair

Over: RIFLE RIVER

4 MI EAST OF M-33, Ogemaw, MI

Built 1990 Load: 36.7 t ADT: 1,154

GREENWOOD ROAD

Fair

Over: I-75

7.0 MI S OF WEST BRANCH, Ogemaw, MI

Built 1970 Load: 37.6 t ADT: 2,188

RAU ROAD

Fair

Over: I-75 NB

3.0 MI S OF WEST BRANCH, Ogemaw, MI

Built 1970 Load: 38.6 t ADT: 1,609

I-75 NB

Fair

Over: SKI PARK RD

3 MI W OF WEST BRANCH, Ogemaw, MI

Built 1972 Load: 39.9 t ADT: 7,368

I-75 SB

Fair

Over: I-75 BL COOK RD

1.7 MI S OF W BRANCH@COL, Ogemaw, MI

Built 1972 Load: 41.8 t ADT: 6,301

I-75 NB

Fair

Over: M-30

2.0 MI S OF WEST BRANCH, Ogemaw, MI

Built 1972 Load: 42.1 t ADT: 5,956

I-75 SB

Fair

Over: M-55

2.0 MI W OF WEST BRANCH, Ogemaw, MI

Built 1972 Load: 42.1 t ADT: 7,700

I-75 NB

Fair

Over: M-55

2.0 MI W OF WEST BRANCH, Ogemaw, MI

Built 1972 Load: 42.1 t ADT: 7,700

I-75 SB

Fair

Over: M-30

2.0 MI S OF WEST BRANCH, Ogemaw, MI

Built 1972 Load: 42.4 t ADT: 5,956

GREENWOOD RD

Fair

Over: RIFLE RIVER

3 MI EAST OF M-33, Ogemaw, MI

Built 1953 Load: 42.8 t ADT: 2,929

M-33

Fair

Over: W BR RIFLE RIVER

1.5 MI S OF M-55, Ogemaw, MI

Built 1985 Load: 43.1 t ADT: 3,091

I-75 NB

Fair

Over: I-75 BL COOK RD

1.7 MI S OF W BRANCH@COL, Ogemaw, MI

Built 1972 Load: 44.4 t ADT: 6,301

I-75 BL

Fair

Over: OGEMAW CREEK

0.3 MI SE OF M-55, Ogemaw, MI

Built 1932 Load: 49.6 t ADT: 13,157

SEVENTH STREET

Fair

Over: WEST BRANCH RIFLE RIVER

1300 FT N OF M-55/M-76, Ogemaw, MI

Built 1994 Load: 55.1 t ADT: 500

GREENWOOD ROAD

Good

Over: TITTABAWASSEE RIVER

1 MI WEST OF M-30, Ogemaw, MI

Built 1992 Load: 32.7 t ADT: 520

BEARDSLEE ROAD

Good

Over: MID BR TITTABAWASSEE RIV

0.6 MI WEST OF M-30, Ogemaw, MI

Built 1992 Load: 32.7 t ADT: 61

PETERS ROAD

Good

Over: RIFLE RIVER

3 MI EAST OF M-33, Ogemaw, MI

Built 1980 Load: 33.2 t ADT: 366

MC CAULEY ROAD

Good

Over: MID BRANCH TITTABAWASSEE

AT SOUTH COUNTY LINE, Ogemaw, MI

Built 1990 Load: 36.6 t ADT: 113

STATE ROAD

Good

Over: RIFLE RIVER

3 MI E OF M-33, Ogemaw, MI

Built 1987 Load: 44.1 t ADT: 1,072

FLYNN ROAD

Good

Over: HOUGHTON CREEK

0.9 MI S OF ROSE CITY RD, Ogemaw, MI

Built 2015 Load: 55.1 t ADT: 154

E ROSE CITY RD

Good

Over: HOUGHTON CREEK

ROSE CITY, Ogemaw, MI

Built 1930 Load: 87.8 t ADT: 2,679

PEACH LAKE RD

Poor

Over: W BR RIFLE RIVER

2 MI SOUTH OF M-55, Ogemaw, MI

Built 1948 Load: 20.1 t ADT: 643

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.