Total bridges
139
Public highway bridges in Midland County
County profile · official public datasets
Midland County, MI
139 public highway bridges tracked in the FHWA National Bridge Inventory: 26.6% rated Good, 56.1% Fair, 17.3% Poor.
- 139
- Public bridges
- 26.6%
- Good condition
- 17.3%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Midland County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 68th
- of 83 on Poor share
- 17.3%
- Poor-condition share
- 139
- public highway bridges
- 1978
- 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.
Midland County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Midland County ranks #68 of 83 Michigan counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 17.3%). Midland County, Michigan contains 139 public highway bridges. Roughly 26.6% are rated “Good,” 56.1% “Fair,” and 17.3% “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
26.6%
37 of 139 rated 7-9
Fair condition
56.1%
78 of 139 rated 5-6
Poor condition
17.3%
24 of 139 rated 4 or below
In-state Poor-share rank
#68 of 83
Among Michigan counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 139 NBI-tracked bridges by lowest applicable component rating.
Good 26.6% (37)
Fair 56.1% (78)
Poor 17.3% (24)
Midland County's Poor-condition bridges carry 42,131 vehicle crossings a day
That is 8.9% of the county's reported daily bridge traffic on 17.3% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,755 crossings a day against 3,056 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 139 of 139 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
45.3% of Midland County's bridges have passed the 50-year mark
63 of the 139 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 26.6% 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 16.1% of the county's Poor-condition bridge traffic
M-30 over US-10, built 1961, carries 6,769 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 24-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 42,131 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Midland County's bridges were built
139 bridges with a recorded construction year, grouped by decade
- 1900s 2
1900–1909
2 bridges
- 1910s 2
1910–1919
2 bridges
- 1920s 4
1920–1929
4 bridges
- 1930s 12
1930–1939
12 bridges
- 1940s 4
1940–1949
4 bridges
- 1950s 2
1950–1959
2 bridges
- 1960s
1960–1969
31 bridges
- 1970s
1970–1979
13 bridges
- 1980s
1980–1989
13 bridges
- 1990s 10
1990–1999
10 bridges
- 2000s
2000–2009
22 bridges
- 2010s
2010–2019
18 bridges
- 2020s 6
2020–2029
6 bridges
What this shows Construction peaked in the 1960s, when 31 of the county's bridges still in the inventory were built, which is 22.3% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1978) matches the Michigan average (1976).
How Midland County compares with Michigan's closest counties by inventory size
The 5 Michigan counties nearest Midland County in number of bridges, with their condition splits. Its 17.3% Poor share is the 6th-lowest of these 6. Its average build year of 1978 against a peer-group mean of 1976 is in line with the group.
Showing the 5 closest of 82 Michigan counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Kalamazoo County | 151 | 41.1% | 52.3% | 6.6% | 1984 |
| Marquette County | 147 | 47.6% | 38.8% | 13.6% | 1972 |
| Muskegon County | 144 | 20.1% | 67.4% | 12.5% | 1968 |
| Midland County (this page) | 139 | 26.6% | 56.1% | 17.3% | 1978 |
| St. Joseph County | 132 | 28.8% | 59.1% | 12.1% | 1979 |
| Van Buren County | 129 | 32.6% | 60.5% | 7% | 1976 |
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 Midland 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 Midland County, both outside Michigan so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MI (139 bridges here).
- Bulloch County, GA · 139 bridges
- St. Helena County, LA · 139 bridges
- Garrett County, MD · 139 bridges
- Leflore County, MS · 139 bridges
Similar average build year
Nearest mean year-built outside MI (1978 here).
- Orange County, CA · avg 1978 · 1,164 bridges
- Sumner County, KS · avg 1978 · 659 bridges
- Allen County, IN · avg 1978 · 613 bridges
- Livingston County, IL · avg 1978 · 579 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (78)
COLEMAN RD
FairOver: US-10
1.0 MI E OF ISABELLA COL, Midland, MI
Built 1962 Load: 39.9 t ADT: 4,924
GORDONVILLE ROAD
FairOver: BULLOCK CREEK
0.65 MI E OF HOMER RD, Midland, MI
Built 1995 Load: 41.7 t ADT: 1,964
HOMER ROAD
FairOver: CHIPPEWA RIVER
0.3 MI N OF PRAIRIE ROAD, Midland, MI
Built 1977 Load: 41.7 t ADT: 3,145
N SAGINAW ROAD
FairOver: STURGEON CREEK
IN CITY OF MIDLAND, Midland, MI
Built 1931 Load: 41.8 t ADT: 20,000
US-10 WB
FairOver: SANFORD LAKE
0.2 MI NW OF M-30, Midland, MI
Built 2008 Load: 42.4 t ADT: 7,893
WACKERLY ROAD
FairOver: STURGEON CREEK
IN CITY OF MIDLAND, Midland, MI
Built 1981 Load: 42.4 t ADT: 3,100
CASTOR ROAD
FairOver: BIG SALT RIVER
0.5 MI N OF WALTER RD, Midland, MI
Built 1980 Load: 44.1 t ADT: 314
REDSTONE ROAD
FairOver: PINE RIVER
0.2 MI E OF PINE RIVER RD, Midland, MI
Built 1979 Load: 45.5 t ADT: 1,074
US-10 EB
FairOver: MUD CREEK
2.8 MI SE OF M-18, Midland, MI
Built 1962 Load: 46.3 t ADT: 4,500
US-10 WB
FairOver: MUD CREEK
2.5 MI SE OF M-18, Midland, MI
Built 1962 Load: 46.3 t ADT: 4,500
US-10 EB
FairOver: US-10BR
@ US-10 BR EASTMAN RD, Midland, MI
Built 2001 Load: 49.6 t ADT: 8,000
US-10 WB
FairOver: US-10BR
@ US-10 BR EASTMAN RD, Midland, MI
Built 2001 Load: 51.5 t ADT: 8,000
BARDEN ROAD
FairOver: HOWARD DRAIN
0.1 MI E OF LEWIS RD, Midland, MI
Built 1980 Load: 53.5 t ADT: 738
US-10 EB
FairOver: BLUFF CREEK
0.8 MI SE OF M-18, Midland, MI
Built 1962 Load: 53.8 t ADT: 4,500
US-10 WB
FairOver: BLUFF CREEK
0.8 MI SE OF M-18, Midland, MI
Built 1962 Load: 53.8 t ADT: 4,500
9 MILE ROAD
FairOver: N BR CARROLL CREEK
JEROME TWP SEC 33/34, Midland, MI
Built 2017 Load: 54.4 t ADT: 500
LAPORTE ROAD
FairOver: LITTLE SALT CREEK
0.3 MI W OF LEWIS RD, Midland, MI
Built 2002 Load: 54.6 t ADT: 91
POSEYVILLE ROAD
FairOver: TITTABAWASSEE RIVER
IN CITY OF MIDLAND, Midland, MI
Built 1968 Load: 54.8 t ADT: 12,000
M-20
FairOver: PRAIRIE CREEK
1.2 MI E OF MERIDIAN RD, Midland, MI
Built 1938 Load: 61.6 t ADT: 16,168
N SAGINAW ROAD
FairOver: BIG SALT RIVER
.2 MI NW OF WEST RIVER RD, Midland, MI
Built 2001 Load: 63.9 t ADT: 6,297
8 MILE ROAD
FairOver: CHIPPEWA RIVER
0.1 MI S OF CHIPPEWA R RD, Midland, MI
Built 1976 Load: 63.9 t ADT: 1,554
GENEVA ROAD
FairOver: BIG SALT RIVER
0.5 MI N OF MACNELLY RD, Midland, MI
Built 1999 Load: 64.6 t ADT: 146
AIRPORT ROAD
FairOver: STURGEON CREEK
0.1 MI W OF STURGEON ROAD, Midland, MI
Built 1960 Load: 65.1 t ADT: 3,911
LEWIS ROAD
FairOver: LITTLE SALT CREEK
100 FT S OF KENT RD, Midland, MI
Built 2007 Load: 66.6 t ADT: 298
9 MILE ROAD
FairOver: PINE RIVER
0.3 MI S OF PINE RIVER RD, Midland, MI
Built 2000 Load: 69.7 t ADT: 448
CURTIS ROAD
FairOver: TITTABAWASSEE RIVER
.05 MI W OF WATER RD, Midland, MI
Built 1997 Load: 73.9 t ADT: 2,067
W MAIN STREET
FairOver: STURGEON CREEK
IN CITY OF MIDLAND, Midland, MI
Built 1962 Load: 97.2 t ADT: 6,250
SWEDE ROAD
FairOver: HERNER DRAIN
MILLS TWP SEC 10/11, Midland, MI
Built 1973 Load: 97.2 t ADT: 275
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.