County profile · official public datasets

Schoolcraft County, MI

54 public highway bridges tracked in the FHWA National Bridge Inventory: 27.8% rated Good, 66.7% Fair, 5.6% Poor.

54
Public bridges
27.8%
Good condition
5.6%
Poor condition

The verdict

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

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

Top 17%
lowest Poor share in state
5.6%
Poor-condition share
54
public highway bridges
1967
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.

Schoolcraft County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Schoolcraft County ranks #14 of 83 Michigan counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 5.6%). Schoolcraft County, Michigan contains 54 public highway bridges. Roughly 27.8% are rated “Good,” 66.7% “Fair,” and 5.6% “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

54

Public highway bridges in Schoolcraft County

Good condition

27.8%

15 of 54 rated 7-9

Fair condition

66.7%

36 of 54 rated 5-6

Poor condition

5.6%

3 of 54 rated 4 or below

In-state Poor-share rank

#14 of 83

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

Condition distribution

Share of 54 NBI-tracked bridges by lowest applicable component rating.

Good
27.8% (15)
Fair
66.7% (36)
Poor
5.6% (3)

Schoolcraft County's Poor-condition bridges carry 70 vehicle crossings a day

That is 0.1% of the county's reported daily bridge traffic on 5.6% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 23 crossings a day against 353 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 54 of 54 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

61.1% of Schoolcraft County's bridges have passed the 50-year mark

33 of the 54 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 27.8% 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 71.4% of the county's Poor-condition bridge traffic

NO DATA ENTERED over S BRANCH STUTTS CREEK, built 1996, carries 50 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 3-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 70 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Schoolcraft County's bridges were built

54 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1950s, when 18 of the county's bridges still in the inventory were built, which is 33.3% of those with a recorded year. That cohort is now 65 to 74 years old in the 2024 inventory. Its average build year is 1967, 9 years older than the Michigan average of 1976.

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

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

The 5 Michigan counties nearest Schoolcraft County in number of bridges, with their condition splits. Its 5.6% Poor share is the 2nd-lowest of these 6. Its average build year of 1967 against a peer-group mean of 1970 is in line with the group.

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

Bridge inventory size and condition shares for Schoolcraft County and the 5 Michigan counties closest to it in inventory size
County Bridges Poor
Houghton County 58 3.4%
Crawford County 54 18.5%
Iron County 54 20.4%
Schoolcraft County (this page) 54 5.6%
Alger County 53 11.3%
Cass County 52 15.4%

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

Similar inventory size

Nearest county inventories outside MI (54 bridges here).

Similar average build year

Nearest mean year-built outside MI (1967 here).

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

All 54 Good 15 Fair 36 Poor 3

All bridges (54)

SOUTHSIDE RD

Fair

Over: GRINDSTONE CREEK

2.0 MI N OF HIAWATHA, Schoolcraft, MI

Built 1991 Load: 5.5 t ADT: 24

NO DATA ENTERED

Fair

Over: BEAVER CREEK

T45N R17W SEC. 18, Schoolcraft, MI

Built 1996 Load: 14.6 t ADT: 50

PORT INLAND ROAD

Fair

Over: BULLDOG CREEK

1 MI E OF MCDONALD LAKE, Schoolcraft, MI

Built 1932 Load: 19.6 t ADT: 785

DRIGGS RIVER ROAD

Fair

Over: DIVERSION DITCH

SEC 7 T45N R14W, Schoolcraft, MI

Built 1940 Load: 20.0 t ADT: 30

C-3 POOL ROAD

Fair

Over: DRIGGS RIVER

SEC 7 T45N R14W, Schoolcraft, MI

Built 1942 Load: 20.0 t ADT: 10

COUNTY ROAD P448

Fair

Over: CREIGHTON RIVER

3.2 MI S OF M-28, Schoolcraft, MI

Built 1978 Load: 23.7 t ADT: 100

CLEAR LAKE ROAD

Fair

Over: STUTTS CREEK

1.2 MI E OF M-94, Schoolcraft, MI

Built 1976 Load: 28.8 t ADT: 17

FOX RIVER RD P450

Fair

Over: FOX RIVER

IN SENEY, Schoolcraft, MI

Built 1938 Load: 30.5 t ADT: 210

M-28

Fair

Over: HOLLAND CREEK

9.2 MI W OF LUCE CO LINE, Schoolcraft, MI

Built 1953 Load: 33.0 t ADT: 1,973

M-94

Fair

Over: M BR STUTTS CREEK

6.1 MI SE OF ALGER COL, Schoolcraft, MI

Built 1959 Load: 33.4 t ADT: 526

M-28

Fair

Over: CREIGHTON CREEK

4.3 MI E OF ALGER CO LINE, Schoolcraft, MI

Built 1952 Load: 33.7 t ADT: 1,973

COUNTY ROAD P448

Fair

Over: WEST BRANCH MANISTIQUE

13 MI S OF M-28, Schoolcraft, MI

Built 1967 Load: 34.3 t ADT: 100

TAYLOR DAM ROAD

Fair

Over: FOX RIVER

0.1 MI N OF COUNTY RD 450, Schoolcraft, MI

Built 1999 Load: 35.0 t ADT: 42

M-28 M-77

Fair

Over: FOX RIVER

4.3 MI W OF LUCE CO LINE, Schoolcraft, MI

Built 1953 Load: 35.3 t ADT: 1,473

M-28

Fair

Over: COMMENCEMENT CREEK

0.1 MI E OF ALGER CO LINE, Schoolcraft, MI

Built 1954 Load: 36.0 t ADT: 1,973

M-94

Fair

Over: BIG DITCH CREEK

16 MI SE OF ALGER COL, Schoolcraft, MI

Built 1960 Load: 36.3 t ADT: 526

M-28

Fair

Over: CLARKS DITCH

6.2 MI W OF LUCE CO LINE, Schoolcraft, MI

Built 1953 Load: 36.3 t ADT: 1,973

M-94

Fair

Over: S BR STUTTS CREEK

7.1 MI SE OF ALGER COL, Schoolcraft, MI

Built 1959 Load: 36.9 t ADT: 526

M-77

Fair

Over: MANISTIQUE RIVER

9.1 MI N OF US-2, Schoolcraft, MI

Built 1954 Load: 36.9 t ADT: 1,490

COUNTY ROAD P448

Fair

Over: CREIGHTON RIVER

7.7 MI S OF M-28, Schoolcraft, MI

Built 1978 Load: 38.0 t ADT: 37

M-28

Fair

Over: WALSH CREEK

9.0 MI E OF ALGER CO LINE, Schoolcraft, MI

Built 1953 Load: 38.2 t ADT: 1,973

NO DATA ENTERED

Fair

Over: MIDDLE BR STUTTS CREEK

T45N R17W SEC. 31, Schoolcraft, MI

Built 1996 Load: 38.2 t ADT: 50

M-94

Fair

Over: MANISTIQUE RIVER

IN MANISTIQUE, Schoolcraft, MI

Built 1918 Load: 41.8 t ADT: 10,220

M-94

Fair

Over: N BR STUTTS CREEK

2.5 MI SE OF ALGER COL, Schoolcraft, MI

Built 1960 Load: 42.1 t ADT: 526

M-94

Fair

Over: STURGEON HOLE CREEK

7.5 MI N OF MANISTIQUE, Schoolcraft, MI

Built 1957 Load: 43.4 t ADT: 827

USFS RTE 2173

Fair

Over: LITTLE INDIAN RIVER BR

0.5 MI S BIG ISLAND LAKE, Schoolcraft, MI

Built 1963 Load: 44.7 t ADT: 75

US-2

Fair

Over: MANISTIQUE RIVER

IN MANISTIQUE, Schoolcraft, MI

Built 1983 Load: 45.0 t ADT: 4,300

US-2

Fair

Over: WCL RR

3.1 MI E OF MANISTIQUE, Schoolcraft, MI

Built 1979 Load: 46.3 t ADT: 5,327

PORT INLAND ROAD

Fair

Over: MILAKOKIA RIVER

4 MI E OF MCDONALD LAKE, Schoolcraft, MI

Built 1931 Load: 48.6 t ADT: 253

TEN CURVES RD H44

Fair

Over: MANISTIQUE RIVER

3 MI E OF GERMFASK, Schoolcraft, MI

Built 1929 Load: 49.6 t ADT: 490

M-28

Fair

Over: DRIGGS RIVER

11.3 MI E OF ALGER COL, Schoolcraft, MI

Built 1953 Load: 50.2 t ADT: 1,973

M-77

Fair

Over: E BR FOX RIVER

4.1 MI N OF M-28, Schoolcraft, MI

Built 1953 Load: 51.2 t ADT: 406

M-77

Fair

Over: HOLLAND CREEK

12.8 MI N OF US-2, Schoolcraft, MI

Built 1928 Load: 54.4 t ADT: 1,063

CO RD P-437 FH43

Fair

Over: INDIAN RIVER

3.5 MI W OF M-94, Schoolcraft, MI

Built 1961 Load: 55.1 t ADT: 54

COOKSON ROAD

Fair

Over: MANISTIQUE RIVER

SEC 28 DOYLE TWP, Schoolcraft, MI

Built 1996 Load: 56.1 t ADT: 48

SOUTHSIDE ROAD

Fair

Over: N BRANCH STUTTS CREEK

2 MI N OF M-94, Schoolcraft, MI

Built 1984 Load: 97.2 t ADT: 24

AUTO TOUR ROUTE

Good

Over: C TO B SPILLWAY

SEC 29 T45N R13W, Schoolcraft, MI

Built 1953 Load: 13.6 t ADT: 120

AUTO TOUR ROUTE

Good

Over: E TO C SPILLWAY

SEC 20 T45N R13W, Schoolcraft, MI

Built 1952 Load: 17.2 t ADT: 90

WAGNER-TAYLOR DM R

Good

Over: WEST BR FOX RIVER

10 MI NW OF SENEY, Schoolcraft, MI

Built 2019 Load: 24.9 t ADT: 10

DNR TRAIL 440

Good

Over: FOX RIVER

5.5 MI W OF LAVENDER CRNR, Schoolcraft, MI

Built 2019 Load: 24.9 t ADT: 5

COUNTY ROAD 436

Good

Over: BEAR CREEK

1.5 MI N OF COUNTY RD 433, Schoolcraft, MI

Built 2011 Load: 31.0 t ADT: 163

FISHING LOOP

Good

Over: E TO D SPILLWAY

SEC 30 T45N R13W, Schoolcraft, MI

Built 1954 Load: 32.7 t ADT: 50

FISHING LOOP ROAD

Good

Over: F TO E SPILLWAY

SEC 20 T45N R13W, Schoolcraft, MI

Built 1954 Load: 32.7 t ADT: 50

BASS LAKE RD

Good

Over: INDIAN RIVER

0.1 MI S OF COUNTY RD 437, Schoolcraft, MI

Built 1976 Load: 33.4 t ADT: 87

M-94

Good

Over: INDIAN RIVER

1.5 MI N OF US-2, Schoolcraft, MI

Built 1954 Load: 36.3 t ADT: 2,701

TEN CURVES RD H44

Good

Over: MANISTIQUE RIVER

IN GERMFASK, Schoolcraft, MI

Built 2013 Load: 36.3 t ADT: 809

COUNTY ROAD P449

Good

Over: INDIAN RIVER

4.6 MI S OF M-94, Schoolcraft, MI

Built 1982 Load: 38.2 t ADT: 27

M-149

Good

Over: DUFOUR CREEK

2.4 MI N OF THOMPSON, Schoolcraft, MI

Built 2014 Load: 48.6 t ADT: 430

COUNTY ROAD P440

Good

Over: INDIAN RIVER

0.2 MI N OF COUNTY RD 441, Schoolcraft, MI

Built 2015 Load: 48.9 t ADT: 605

COUNTY ROAD P448

Good

Over: STUTTS CREEK

16.7 MI S OF M-28, Schoolcraft, MI

Built 2023 Load: 55.1 t ADT: 100

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

Related

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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.