Total bridges
147
Public highway bridges in Marquette County
County profile · official public datasets
Marquette County, MI
147 public highway bridges tracked in the FHWA National Bridge Inventory: 47.6% rated Good, 38.8% Fair, 13.6% Poor.
- 147
- Public bridges
- 47.6%
- Good condition
- 13.6%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Marquette County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 53rd
- of 83 on Poor share
- 13.6%
- Poor-condition share
- 147
- public highway bridges
- 1972
- 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.
Marquette County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Marquette County ranks #53 of 83 Michigan counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 13.6%). Marquette County, Michigan contains 147 public highway bridges. Roughly 47.6% are rated “Good,” 38.8% “Fair,” and 13.6% “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.
Good condition
47.6%
70 of 147 rated 7-9
Fair condition
38.8%
57 of 147 rated 5-6
Poor condition
13.6%
20 of 147 rated 4 or below
In-state Poor-share rank
#53 of 83
Among Michigan counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 147 NBI-tracked bridges by lowest applicable component rating.
Good 47.6% (70)
Fair 38.8% (57)
Poor 13.6% (20)
Marquette County's Poor-condition bridges carry 16,666 vehicle crossings a day
That is 6.9% of the county's reported daily bridge traffic on 13.6% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 833 crossings a day against 1,228 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 147 of 147 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
49% of Marquette County's bridges have passed the 50-year mark
72 of the 147 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 47.6% 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 43.2% of the county's Poor-condition bridge traffic
M-553 (CO RD 553) over C & NW RAILROAD, built 1976, carries 7,200 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 20-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 16,666 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Marquette County's bridges were built
147 bridges with a recorded construction year, grouped by decade
- 1910s 2
1910–1919
2 bridges
- 1920s
1920–1929
14 bridges
- 1930s
1930–1939
28 bridges
- 1940s 9
1940–1949
9 bridges
- 1950s 10
1950–1959
10 bridges
- 1960s 7
1960–1969
7 bridges
- 1970s 7
1970–1979
7 bridges
- 1980s
1980–1989
16 bridges
- 1990s 5
1990–1999
5 bridges
- 2000s
2000–2009
17 bridges
- 2010s
2010–2019
26 bridges
- 2020s 6
2020–2029
6 bridges
What this shows Construction peaked in the 1930s, when 28 of the county's bridges still in the inventory were built, which is 19% of those with a recorded year. That cohort is now 85 to 94 years old in the 2024 inventory. Its average build year (1972) matches the Michigan average (1976).
How Marquette County compares with Michigan's closest counties by inventory size
The 5 Michigan counties nearest Marquette County in number of bridges, with their condition splits. Its 13.6% Poor share is the 5th-lowest of these 6. Its average build year of 1972 against a peer-group mean of 1977 is 5 years older.
Showing the 5 closest of 82 Michigan counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Jackson County | 158 | 34.2% | 55.7% | 10.1% | 1978 |
| Kalamazoo County | 151 | 41.1% | 52.3% | 6.6% | 1984 |
| Marquette County (this page) | 147 | 47.6% | 38.8% | 13.6% | 1972 |
| Muskegon County | 144 | 20.1% | 67.4% | 12.5% | 1968 |
| Midland County | 139 | 26.6% | 56.1% | 17.3% | 1978 |
| St. Joseph County | 132 | 28.8% | 59.1% | 12.1% | 1979 |
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 Marquette 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 Marquette County, both outside Michigan so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MI (147 bridges here).
- Barren County, KY · 147 bridges
- Avoyelles County, LA · 147 bridges
- Carlton County, MN · 147 bridges
- Wabasha County, MN · 147 bridges
Similar average build year
Nearest mean year-built outside MI (1972 here).
- Santa Clara County, CA · avg 1972 · 964 bridges
- Madison County, AL · avg 1972 · 710 bridges
- Kern County, CA · avg 1972 · 668 bridges
- York County, PA · avg 1972 · 569 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (147)
BAA ROAD
FairOver: SAND RIVER
5 MI E OF GORDON, Marquette, MI
Built 1932 Load: 8.1 t ADT: 10
COUNTY RD 480
FairOver: L S & I RAILROAD
IN NEGAUNEE, Marquette, MI
Built 1968 Load: 15.9 t ADT: 4,000
IDA ROAD
FairOver: PESHEKEE RIVER
0.5 MI N OF US41, Marquette, MI
Built 1940 Load: 17.2 t ADT: 20
KO ROAD
FairOver: LITTLE GARLIC RIVER
0.5 MI N OF BUCKROE, Marquette, MI
Built 1936 Load: 20.1 t ADT: 20
COUNTY ROUTE 510
FairOver: YELLOW DOG RIVER
6 MI SOUTH OF BIG BAY, Marquette, MI
Built 1973 Load: 20.4 t ADT: 314
FW ROAD
FairOver: BLACK RIVER
0.2 MI S OF 478 HWY, Marquette, MI
Built 1934 Load: 20.4 t ADT: 10
HD ROAD
FairOver: BISMARK CREEK
1.0 MI W OF 550 HWY, Marquette, MI
Built 1928 Load: 20.4 t ADT: 40
HD ROAD
FairOver: BISMARK CREEK
1.1 MI W OF 550 HWY, Marquette, MI
Built 1928 Load: 20.4 t ADT: 40
HD ROAD
FairOver: HARLOW CREEK
0.6 MI W OF 550 HWY, Marquette, MI
Built 1928 Load: 20.4 t ADT: 40
MWFROAD
FairOver: ESCANABA RIVER OVERFLOW
6 MI S OF PALMER, Marquette, MI
Built 1930 Load: 20.4 t ADT: 10
FFK ROAD
FairOver: BLACK RIVER
0.2 MI N OF 478 HWY, Marquette, MI
Built 1935 Load: 23.7 t ADT: 20
GGA ROAD
FairOver: BOISE CREEK
2.0 MI W OF 510 HWY, Marquette, MI
Built 1980 Load: 26.6 t ADT: 10
UNCLE TOM ROAD
FairOver: E BR ESCANABA RIVER
2.0 MI W OF M-553, Marquette, MI
Built 1985 Load: 26.6 t ADT: 10
BAE ROAD
FairOver: CHOCOLAY RIVER
4.5 MILES N OF SKANDIA, Marquette, MI
Built 1910 Load: 28.2 t ADT: 400
TH (BECKMAN ROAD)
FairOver: NELSON CREEK
1 MI NW OF SKANDIA, Marquette, MI
Built 1930 Load: 28.2 t ADT: 40
ALTAMONT ST
FairOver: US-41 M-28
IN MARQUETTE, Marquette, MI
Built 1963 Load: 29.5 t ADT: 1,500
COUNTY RD 601
FairOver: MICHIGAMME RIVER
IN REPUBLIC, Marquette, MI
Built 1911 Load: 30.5 t ADT: 527
M-94
FairOver: NELSON CREEK
1.6 MI E OF US-41, Marquette, MI
Built 1953 Load: 31.4 t ADT: 1,175
COUNTY HWY 607
FairOver: PESHEKEE RIVER
5 MI N OF US41, Marquette, MI
Built 1926 Load: 31.4 t ADT: 190
M-35
FairOver: E BR ESCANABA RIVER
IN GWINN, Marquette, MI
Built 1940 Load: 32.4 t ADT: 4,907
M-35
FairOver: WARNER CREEK
2 MI SE OF PALMER, Marquette, MI
Built 1984 Load: 32.4 t ADT: 1,146
BH ROAD
FairOver: CHOCOLAY RIVER
4.5 MI N OF SKANDIA, Marquette, MI
Built 2004 Load: 32.4 t ADT: 100
COUNTY HWY 607
FairOver: PESHEKEE RIVER
4.5 MI N OF US41, Marquette, MI
Built 1926 Load: 32.7 t ADT: 200
TH (BECKMAN ROAD)
FairOver: W BRANCH CHOCOLAY RIVER
1 MI NW OF SKANDIA, Marquette, MI
Built 1929 Load: 33.6 t ADT: 40
COUNTY ROAD 550
FairOver: DEAD RIVER
IN MARQUETTE, Marquette, MI
Built 1995 Load: 35.0 t ADT: 2,812
M-35
FairOver: MIDDLE BR ESCANABA RIVER
6.2 MI NW OF GWINN, Marquette, MI
Built 1985 Load: 35.3 t ADT: 1,146
US-41 SB
FairOver: CARP RIVER
1.3 MI W OF M-35, Marquette, MI
Built 1958 Load: 35.3 t ADT: 8,662
US-41
FairOver: CHOCOLAY RIVER
7.5 MI SE OF M-28, Marquette, MI
Built 1954 Load: 35.6 t ADT: 4,934
M-95
FairOver: BLACK RIVER
3.2 MI S OF US-41, Marquette, MI
Built 1942 Load: 36.0 t ADT: 2,378
M-35
FairOver: MIDDLE BR ESCANABA RIVER
1.2 MI W OF GWINN, Marquette, MI
Built 1967 Load: 36.3 t ADT: 4,907
US-41 NB
FairOver: CARP RIVER
1.3 MI W OF M-35, Marquette, MI
Built 1955 Load: 36.3 t ADT: 8,662
JA ROAD
FairOver: CARP RIVER
1.5 MI N OF US41, Marquette, MI
Built 1934 Load: 36.4 t ADT: 1,004
US-41
FairOver: CHERRY CREEK BURIED
0.9 MI SE OF M-28, Marquette, MI
Built 1952 Load: 37.3 t ADT: 6,982
KCI ROAD
FairOver: WILSON CREEK
INTERSECTION OF HWY 550, Marquette, MI
Built 1935 Load: 37.3 t ADT: 30
US-41 M-28
FairOver: PESHEKEE RIVER
2.3 MI W OF CHAMPION, Marquette, MI
Built 1994 Load: 37.9 t ADT: 3,337
M-95
FairOver: TROUT FALLS CREEK
9.8 MI S OF US-41, Marquette, MI
Built 1958 Load: 38.2 t ADT: 3,375
CHAMPION ST
FairOver: US-41 M-28
IN MARQUETTE, Marquette, MI
Built 1963 Load: 38.9 t ADT: 3,300
M-35
FairOver: WARNER CREEK
IN PALMER, Marquette, MI
Built 1965 Load: 39.9 t ADT: 2,505
M-95
FairOver: MICHIGAMME RIVER
6.9 MI S OF US-41, Marquette, MI
Built 1958 Load: 40.2 t ADT: 3,375
COUNTY RD 533
FairOver: HUBER CREEK
2 MILES S OF US41, Marquette, MI
Built 1925 Load: 43.6 t ADT: 124
COUNTY HWY 607
FairOver: PESHEKEE RIVER
7 MI N OF US41, Marquette, MI
Built 1927 Load: 43.6 t ADT: 188
US-41
FairOver: LS&I RR
AT W LIMITS OF ISHPEMING, Marquette, MI
Built 1979 Load: 44.7 t ADT: 13,542
M-95
FairOver: MICHIGAMME RIVER
0.2 MI N OF DICKINSON COL, Marquette, MI
Built 1938 Load: 46.0 t ADT: 1,850
COUNTY RD 573
FairOver: LITTLE DEAD RIVER
6 MILES N OF ISHPEMING, Marquette, MI
Built 1983 Load: 49.1 t ADT: 693
US-41 M-28
FairOver: CARP RIVER
IN MARQUETTE, Marquette, MI
Built 1936 Load: 49.9 t ADT: 23,600
BAE ROAD
FairOver: SAND RIVER
6 MI E OF MANGUN, Marquette, MI
Built 1930 Load: 50.0 t ADT: 60
LAKE SHORE BLVD
FairOver: DEAD RIVER
CITY OF MARQUETTE, Marquette, MI
Built 1984 Load: 51.2 t ADT: 4,700
US-41
FairOver: CARP RIVER
IN ISHPEMING, Marquette, MI
Built 1979 Load: 56.7 t ADT: 13,542
CO RD 510(RELOC)
FairOver: DEAD RIVER
2 MILES N OF US-41, Marquette, MI
Built 2010 Load: 58.3 t ADT: 1,912
COUNTY RD 533
FairOver: WERNERS CREEK
5 MILES SO. OF US41, Marquette, MI
Built 1925 Load: 59.1 t ADT: 124
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.