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.
Good-condition bridges (70)
MWC ROAD
GoodOver: SCHWEITZERS CREEK
2.4 MI S OF PALMER, Marquette, MI
Built 1935 Load: 10.4 t ADT: 10
LLL ROAD
GoodOver: TROUT FALLS CREEK
1.3 MI N OF SO REPUBLIC, Marquette, MI
Built 1935 Load: 18.2 t ADT: 30
CG ROAD
GoodOver: ESCANABA RIVER
3.5 MILES S OF GREENWOOD, Marquette, MI
Built 1943 Load: 26.4 t ADT: 80
COUNTY ROAD 492
GoodOver: CARP RIVER
02 MI E OF US-41 OR M-28, Marquette, MI
Built 1932 Load: 28.5 t ADT: 1,099
COUNTY RD 573
GoodOver: CARP RIVER
1 MILE NORTH OF US-41, Marquette, MI
Built 1982 Load: 29.1 t ADT: 995
M-35
GoodOver: GREEN RIVER
7.5 MI NW OF GWINN, Marquette, MI
Built 1985 Load: 29.5 t ADT: 1,146
COUNTY ROAD EXTN
GoodOver: BLACK RIVER
0.5 MI W OF CR 581, Marquette, MI
Built 2021 Load: 29.5 t ADT: 10
KB ROAD
GoodOver: WILSON CREEK
0.04 MI N OF HWY 550, Marquette, MI
Built 2001 Load: 30.0 t ADT: 300
AAO ROAD
GoodOver: BIG DEAD RIVER
0.05 MI W OF AAT ROAD, Marquette, MI
Built 2003 Load: 32.4 t ADT: 80
US-41
GoodOver: NELSON CREEK BURIED
4.9 MI NW OF ALGER COL, Marquette, MI
Built 1939 Load: 32.7 t ADT: 3,609
LAKESHORE DRIVE
GoodOver: CARP CREEK
0.1 MI N OF US-41/M-28, Marquette, MI
Built 1993 Load: 32.7 t ADT: 4,750
COUNTY RD 557
GoodOver: BIG WEST RIVER
7 MILES NO OF MASHEK, Marquette, MI
Built 2018 Load: 33.0 t ADT: 357
M-35
GoodOver: WARNER CREEK
IN PALMER, Marquette, MI
Built 1986 Load: 33.4 t ADT: 2,505
SOUTHGATE DR CR EL
GoodOver: HALFWAY CREEK
FORSYTH TWP SEC 21, Marquette, MI
Built 2018 Load: 33.4 t ADT: 200
COUNTY RD 565
GoodOver: SCHWEITZER CREEK
3 MILES SOUTH OF PALMER, Marquette, MI
Built 2021 Load: 34.0 t ADT: 62
COUNTY RD OC
GoodOver: NELSON CREEK
0.5 MI E OF US-41, Marquette, MI
Built 2004 Load: 34.3 t ADT: 40
CO RD TJ
GoodOver: EAST BR CHOCOLAY RIVER
1.5 MI S OF M-94, Marquette, MI
Built 2002 Load: 34.7 t ADT: 20
EAA ROAD
GoodOver: BIG BROOK
2.5 MI NW OF 438 HWY, Marquette, MI
Built 2007 Load: 35.6 t ADT: 20
M-28
GoodOver: CHOCOLAY RIVER
1.1 MI E OF US-41, Marquette, MI
Built 2005 Load: 36.3 t ADT: 9,335
BI ROAD
GoodOver: MUD CREEK
0.9 MI N OF BAE ROAD, Marquette, MI
Built 2007 Load: 37.6 t ADT: 80
TD (TOWN HALL RD)
GoodOver: E BR OF CHOCOLAY RIVER
1.8 MI W OF SKANDIA, Marquette, MI
Built 1997 Load: 37.6 t ADT: 250
COUNTY RD 565
GoodOver: M BR ESCANABA RIVER
7 MILES SOUTH OF PALMER, Marquette, MI
Built 2000 Load: 37.9 t ADT: 176
M-553
GoodOver: CARP RIVER
0.5 MI S OF M-554, Marquette, MI
Built 2002 Load: 37.9 t ADT: 6,595
M-35
GoodOver: CARP RIVER
7.0 MI NE OF PALMER, Marquette, MI
Built 2020 Load: 38.2 t ADT: 3,650
M-94 (CO RD 460)
GoodOver: E BRANCH CHOCOLAY RIVER
1.8 MILES WEST OF US-41, Marquette, MI
Built 2017 Load: 38.2 t ADT: 900
IRON STREET
GoodOver: E BRANCH ESCANABA RIVER
IN VILLAGE OF GWINN, Marquette, MI
Built 1984 Load: 38.2 t ADT: 1,986
COUNTY RD 581
GoodOver: M BR ESCANABA RIVER
6 MILES S OF GREENWOOD, Marquette, MI
Built 2008 Load: 38.4 t ADT: 1,360
COUNTY ROAD 550
GoodOver: ALDER CREEK
AT RANSOM, Marquette, MI
Built 2013 Load: 38.9 t ADT: 1,505
LAKE SHORE BLVD
GoodOver: WHETSTONE CREEK
1480 FT S OF BARAGA AVE, Marquette, MI
Built 2005 Load: 38.9 t ADT: 3,000
COUNTY ROAD 550
GoodOver: WILSON CREEK
3.4 MI N OF BIRCH, Marquette, MI
Built 2014 Load: 38.9 t ADT: 3,538
RIVER PARK RD
GoodOver: CARP RIVER
0.1 M E OF N LAKESHORE DR, Marquette, MI
Built 1996 Load: 39.2 t ADT: 1,000
US-41 M-28
GoodOver: M BR ESCANABA RIVER
2.5 MI E OF M-95, Marquette, MI
Built 1989 Load: 39.5 t ADT: 5,585
GGT ROAD
GoodOver: DEER CREEK
3.0 MI SW OF 510 HWY, Marquette, MI
Built 2007 Load: 40.5 t ADT: 20
PXROAD
GoodOver: N BRANCH BIG WEST RIVER
9 MI W 2 MI S OF AUSTIN, Marquette, MI
Built 2007 Load: 40.5 t ADT: 20
PFSROAD
GoodOver: SCHWEITZERS CREEK
3 MI SW OF PALMER, Marquette, MI
Built 2005 Load: 42.6 t ADT: 20
CP ROAD
GoodOver: MIDDLE BR OF ESCANABA RI
0.1 MI S OF US41, Marquette, MI
Built 2016 Load: 42.8 t ADT: 120
AAT ROAD
GoodOver: MULLIGAN CREEK
8 MI W OF HWY 510 ON ATT, Marquette, MI
Built 2013 Load: 43.3 t ADT: 50
COUNTY ROAD 607
GoodOver: PESHEKEE RIVER
14 MI N OF US41, Marquette, MI
Built 1931 Load: 44.7 t ADT: 29
COUNTY ROAD 550
GoodOver: COMPEAU CREEK
1.5 MILES N OF MARQUETTE, Marquette, MI
Built 2014 Load: 44.7 t ADT: 1,400
HD RD(FORESTVILLE)
GoodOver: DEAD RIVER
2 MI N OF JCT US41 CO492, Marquette, MI
Built 2012 Load: 45.0 t ADT: 378
NP ROAD
GoodOver: CARP RIVER
3.5 MI N OF CASCADE, Marquette, MI
Built 2018 Load: 45.4 t ADT: 210
M-35
GoodOver: C&NW & GOOSE LAKE
4.0 MI NE OF PALMER, Marquette, MI
Built 1965 Load: 45.7 t ADT: 2,505
COUNTY ROAD 550
GoodOver: HARLOW CREEK
6 MILES NO MARQUETTE, Marquette, MI
Built 2014 Load: 46.3 t ADT: 1,400
COUNTY RD 550
GoodOver: LITTLE GARLIC RIVER
1 MILE WEST OF BUCKROE, Marquette, MI
Built 2014 Load: 46.3 t ADT: 1,900
COUNTY ROAD 550
GoodOver: BIG GARLIC RIVER
3 MILES WEST OF BUCKROE, Marquette, MI
Built 2015 Load: 46.3 t ADT: 1,900
COUNTY RD 550
GoodOver: YELLOW DOG RIVER
AT ANTLERS, Marquette, MI
Built 2014 Load: 46.3 t ADT: 1,400
MK ROAD
GoodOver: WARNER CREEK
3.5 SE OF PALMER, Marquette, MI
Built 2015 Load: 48.6 t ADT: 20
COUNTY RD 565
GoodOver: BEAR CREEK
1 MILE WEST OF M35, Marquette, MI
Built 2011 Load: 49.2 t ADT: 167
OLD M-28 BR
GoodOver: CARP RIVER CHANNEL
W LIMITS OF ISHPEMING, Marquette, MI
Built 2010 Load: 51.8 t ADT: 4,187
COUNTY RD 545
GoodOver: E BR CHOCOLAY RIV
2 MILES NO WEST OF CARLS, Marquette, MI
Built 1939 Load: 51.8 t ADT: 177
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.