County profile · official public datasets

Kalamazoo County, MI

151 public highway bridges tracked in the FHWA National Bridge Inventory: 41.1% rated Good, 52.3% Fair, 6.6% Poor.

151
Public bridges
41.1%
Good condition
6.6%
Poor condition

The verdict

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

Kalamazoo County pairs a better-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

Top 28%
lowest Poor share in state
6.6%
Poor-condition share
151
public highway bridges
1984
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.

Kalamazoo County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Kalamazoo County ranks #23 of 83 Michigan counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 6.6%). Kalamazoo County, Michigan contains 151 public highway bridges. Roughly 41.1% are rated “Good,” 52.3% “Fair,” and 6.6% “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

151

Public highway bridges in Kalamazoo County

Good condition

41.1%

62 of 151 rated 7-9

Fair condition

52.3%

79 of 151 rated 5-6

Poor condition

6.6%

10 of 151 rated 4 or below

In-state Poor-share rank

#23 of 83

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

Condition distribution

Share of 151 NBI-tracked bridges by lowest applicable component rating.

Good
41.1% (62)
Fair
52.3% (79)
Poor
6.6% (10)

Kalamazoo County's Poor-condition bridges carry 61,344 vehicle crossings a day

That is 4.2% of the county's reported daily bridge traffic on 6.6% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 6,134 crossings a day against 13,165 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 151 of 151 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

38.4% of Kalamazoo County's bridges have passed the 50-year mark

58 of the 151 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 41.1% 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 46.1% of the county's Poor-condition bridge traffic

US-131 NB over AMTRAK & KL AVE, built 1963, carries 28,268 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 10-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 61,344 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Kalamazoo County's bridges were built

151 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1960s, when 28 of the county's bridges still in the inventory were built, which is 18.5% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year is 1984, 8 years newer than the Michigan average of 1976.

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

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

The 5 Michigan counties nearest Kalamazoo County in number of bridges, with their condition splits. Its 6.6% Poor share is the 1st-lowest of these 6. Its average build year of 1984 against a peer-group mean of 1976 is 8 years newer.

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

Bridge inventory size and condition shares for Kalamazoo County and the 5 Michigan counties closest to it in inventory size
County Bridges Poor
Lapeer County 163 9.2%
Shiawassee County 163 9.2%
Jackson County 158 10.1%
Kalamazoo County (this page) 151 6.6%
Marquette County 147 13.6%
Muskegon County 144 12.5%

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

Similar inventory size

Nearest county inventories outside MI (151 bridges here).

Similar average build year

Nearest mean year-built outside MI (1984 here).

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

All 151 Good 62 Fair 79 Poor 10

Good-condition bridges (62)

NORTH SPRINKLE RD

Good

Over: SPRING BROOK

SEC 19 RICHLAND TWP, Kalamazoo, MI

Built 1998 ADT: 5,828

38TH STREET

Good

Over: LITTLE PORTAGE CREEK

2 MI W 1.8 MI S OF FULTON, Kalamazoo, MI

Built 1993 Load: 15.9 t ADT: 341

MILHAM AVE

Good

Over: PORTAGE CREEK

SEC 3-10 PORTAGE TWP, Kalamazoo, MI

Built 1990 Load: 19.3 t ADT: 13,142

44 TH STREET

Good

Over: AUGUSTA CREEK TRIBU

ROSS TWP SEC 3, Kalamazoo, MI

Built 2007 Load: 19.3 t ADT: 391

PORTAGE ROAD

Good

Over: BARTON-HOWARD LAKES CHAN

SCHOOLCRAFT TWP SEC 27, Kalamazoo, MI

Built 2005 Load: 24.2 t ADT: 1,302

I-94 EB & CD RAMP

Good

Over: US-131 SB

AT US-131 SB, Kalamazoo, MI

Built 2008 Load: 28.5 t ADT: 19,866

I-94 WB

Good

Over: US-131 SB

AT US-131 SB, Kalamazoo, MI

Built 2007 Load: 28.5 t ADT: 19,866

SPRINKLE ROAD

Good

Over: I-94

6.2 MI E OF US-131, Kalamazoo, MI

Built 2015 Load: 32.4 t ADT: 27,500

KILGORE ROAD

Good

Over: PORTAGE CREEK

SEC 3-10 PORTAGE TWP, Kalamazoo, MI

Built 2013 Load: 32.4 t ADT: 16,205

DRAKE ROAD

Good

Over: PEDESTRIAN WALKWAY

S OF PARKVIEW, Kalamazoo, MI

Built 2001 Load: 32.7 t ADT: 5,000

COOLEY ST

Good

Over: ARCADIA CREEK

BTWN ELEANOR & W WATER ST, Kalamazoo, MI

Built 1992 Load: 32.7 t ADT: 350

ROSE ST

Good

Over: ARCADIA CREEK

BTWN ELEANOR & W WATER ST, Kalamazoo, MI

Built 1992 Load: 32.7 t ADT: 7,600

MILLER RD

Good

Over: DAVIS CREEK

0.75 MI W OF SPRINKLE RD, Kalamazoo, MI

Built 1955 Load: 32.7 t ADT: 7,858

I-94 EB & CD RAMP

Good

Over: US-131 NB

AT US-131 NB, Kalamazoo, MI

Built 2008 Load: 34.0 t ADT: 39,044

C AVENUE

Good

Over: AUGUSTA CREEK

ROSS TWP SEC 10&15, Kalamazoo, MI

Built 2019 Load: 34.7 t ADT: 803

I-94 WB

Good

Over: US-131 NB

AT US-131 NB, Kalamazoo, MI

Built 2007 Load: 35.3 t ADT: 39,044

PORTAGE ROAD

Good

Over: GOURD NECK CREEK

0.4MI S/PORTAGE CITYLIMIT, Kalamazoo, MI

Built 2006 Load: 35.9 t ADT: 11,685

44TH STREET

Good

Over: BEAR CREEK

2.8 MI S 1 MI E OF FULTON, Kalamazoo, MI

Built 1988 Load: 36.0 t ADT: 70

G AVENUE

Good

Over: GULL CREEK

SEC 31 ROSS TWP, Kalamazoo, MI

Built 2007 Load: 36.3 t ADT: 4,754

R AVE

Good

Over: PORTAGE RIVER

0.34 MI E OF 29TH ST, Kalamazoo, MI

Built 2019 Load: 36.3 t ADT: 1,020

I-94

Good

Over: PORTAGE ROAD

4.0 MI E OF US-131, Kalamazoo, MI

Built 2022 Load: 37.6 t ADT: 67,300

I-94 WB

Good

Over: 12 TH STREET

0.6 MI W OF US-131, Kalamazoo, MI

Built 2007 Load: 37.6 t ADT: 19,866

NINTH STREET

Good

Over: AMTRAK RR

1.5 MI N OF OSHTEMO, Kalamazoo, MI

Built 2008 Load: 38.2 t ADT: 10,671

I-94 EB

Good

Over: 12 TH STREET

0.6 MI W OF US-131, Kalamazoo, MI

Built 2008 Load: 39.5 t ADT: 19,866

RIVERVIEW DRIVE

Good

Over: SPRING BROOK

1.6 MI N OF PARCHMENT, Kalamazoo, MI

Built 2000 Load: 40.2 t ADT: 5,900

I-94 BL (STADIUM)

Good

Over: US-131

2.3 MI N OF I-94, Kalamazoo, MI

Built 2015 Load: 40.5 t ADT: 36,361

PATERSON STREET

Good

Over: KALAMAZOO RIVER

CITY OF KALAMAZOO, Kalamazoo, MI

Built 1956 Load: 40.5 t ADT: 7,224

O AVENUE

Good

Over: PORTAGE RIVER

0.25 MI E OF 36TH STREET, Kalamazoo, MI

Built 2014 Load: 40.5 t ADT: 200

I-94 WB

Good

Over: US-131 SB TO I-94 EB CON

I-94/US-131 INTERCHANGE, Kalamazoo, MI

Built 2007 Load: 41.1 t ADT: 23,695

ROMENCE ROAD

Good

Over: PORTAGE CREEK

IN PORTAGE TWP SEC 10-15, Kalamazoo, MI

Built 1992 Load: 41.5 t ADT: 16,452

I-94 EB

Good

Over: US-131SB TO I-94 EB CONN

I-94/US-131 INTERCHANGE, Kalamazoo, MI

Built 2008 Load: 41.5 t ADT: 23,695

THIRTY-FIFTH ST

Good

Over: KALAMAZOO RIVER

W GALESBURG LIMITS, Kalamazoo, MI

Built 2008 Load: 42.1 t ADT: 14,452

LAKE STREET

Good

Over: PORTAGE CREEK

IN KALAMAZOO, Kalamazoo, MI

Built 1986 Load: 42.4 t ADT: 2,895

37TH STREET

Good

Over: GULL LAKE OUTLET

ROSS TWP SEC 31, Kalamazoo, MI

Built 2012 Load: 42.4 t ADT: 1,600

I-94 WB

Good

Over: GRAND ELK RR&PORTAGE CRK

3.0 MI E OF US-131, Kalamazoo, MI

Built 2011 Load: 43.7 t ADT: 34,630

U AVENUE

Good

Over: LITTLE PORTAGE CREEK

2 MI N 0.2 MI W OF FULTON, Kalamazoo, MI

Built 1981 Load: 44.7 t ADT: 86

PORTAGE

Good

Over: PORTAGE CREEK

IN KALAMAZOO, Kalamazoo, MI

Built 1986 Load: 46.7 t ADT: 12,623

YZ AVENUE

Good

Over: FLOWERFIELD CREEK

0.6MI W 2MI S /SCHOOLCRAF, Kalamazoo, MI

Built 1986 Load: 47.6 t ADT: 767

V AVENUE

Good

Over: LITTLE PORTAGE CREEK

1 MI N 0.2 MI W OF FULTON, Kalamazoo, MI

Built 2006 Load: 48.0 t ADT: 300

I-94 EB

Good

Over: S WESTNEDGE AVE

2.4 MI E OF US-131, Kalamazoo, MI

Built 2010 Load: 48.3 t ADT: 30,000

I-94 WB

Good

Over: S WESTNEDGE AVE

2.4 MI E OF US-131, Kalamazoo, MI

Built 2011 Load: 48.3 t ADT: 30,000

U AVENUE

Good

Over: PORTAGE RIVER

0.9 MI SE OF INDIAN LAKE, Kalamazoo, MI

Built 2016 Load: 48.3 t ADT: 1,109

HART DRIVE

Good

Over: SAND CREEK

ALAMO TWP SEC 22, Kalamazoo, MI

Built 2006 Load: 48.6 t ADT: 228

I-94 EB

Good

Over: GTW RR

5.7 MI E OF US-131, Kalamazoo, MI

Built 2022 Load: 49.9 t ADT: 33,650

I-94 WB

Good

Over: GTW RR

5.7 MI E OF US-131, Kalamazoo, MI

Built 2022 Load: 49.9 t ADT: 33,650

DUTTON STREET

Good

Over: PORTAGE CREEK

IN CITY OF KALAMAZOO, Kalamazoo, MI

Built 1993 Load: 50.2 t ADT: 900

I-94

Good

Over: NORFOLK SOUTHERN

4.8 MI E OF US-131, Kalamazoo, MI

Built 2022 Load: 51.5 t ADT: 67,300

42ND STREET

Good

Over: LITTLE PORTAGE CREEK

2.3 MI N OF FULTON, Kalamazoo, MI

Built 1993 Load: 53.8 t ADT: 931

W AVENUE

Good

Over: PORTAGE RIVER

2 MI EAST OF VICKSBURG, Kalamazoo, MI

Built 1993 Load: 54.8 t ADT: 4,271

MILLS

Good

Over: KALAMAZOO

IN KALAMAZOO, Kalamazoo, MI

Built 1993 Load: 57.3 t ADT: 11,538

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.