Total bridges
612
Public highway bridges in Mobile County
County profile · official public datasets
Mobile County, AL
612 public highway bridges tracked in the FHWA National Bridge Inventory: 21.1% rated Good, 76.1% Fair, 2.8% Poor.
- 612
- Public bridges
- 21.1%
- Good condition
- 2.8%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Mobile 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 46%
- lowest Poor share in state
- 2.8%
- Poor-condition share
- 612
- public highway bridges
- 1980
- 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.
Mobile County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Mobile County ranks #31 of 67 Alabama counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 2.8%). Mobile County, Alabama contains 612 public highway bridges. Roughly 21.1% are rated “Good,” 76.1% “Fair,” and 2.8% “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
21.1%
129 of 612 rated 7-9
Fair condition
76.1%
466 of 612 rated 5-6
Poor condition
2.8%
17 of 612 rated 4 or below
In-state Poor-share rank
#31 of 67
Among Alabama counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 612 NBI-tracked bridges by lowest applicable component rating.
Good 21.1% (129)
Fair 76.1% (466)
Poor 2.8% (17)
Mobile County's Poor-condition bridges carry 66,988 vehicle crossings a day
That is 0.9% of the county's reported daily bridge traffic on 2.8% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 3,940 crossings a day against 6,342 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 603 of 612 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
42.5% of Mobile County's bridges have passed the 50-year mark
260 of the 612 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 21.1% 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 28.9% of the county's Poor-condition bridge traffic
MCGREGOR AVE over ESLAVA CREEK, built 1964, carries 19,384 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 17-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 66,988 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Mobile County's bridges were built
612 bridges with a recorded construction year, grouped by decade
- 1920s 7
1920–1929
7 bridges
- 1930s 17
1930–1939
17 bridges
- 1940s 14
1940–1949
14 bridges
- 1950s 49
1950–1959
49 bridges
- 1960s
1960–1969
128 bridges
- 1970s
1970–1979
89 bridges
- 1980s
1980–1989
74 bridges
- 1990s
1990–1999
110 bridges
- 2000s
2000–2009
75 bridges
- 2010s 30
2010–2019
30 bridges
- 2020s 19
2020–2029
19 bridges
What this shows Construction peaked in the 1960s, when 128 of the county's bridges still in the inventory were built, which is 20.9% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year is 1980, 6 years newer than the Alabama average of 1974.
How Mobile County compares with Alabama's closest counties by inventory size
The 5 Alabama counties nearest Mobile County in number of bridges, with their condition splits. Its 2.8% Poor share is the 5th-lowest of these 6. Its average build year of 1980 against a peer-group mean of 1978 is in line with the group.
Showing the 5 closest of 66 Alabama counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Madison County | 710 | 41.8% | 56.9% | 1.3% | 1972 |
| Mobile County (this page) | 612 | 21.1% | 76.1% | 2.8% | 1980 |
| Montgomery County | 596 | 37.9% | 59.9% | 2.2% | 1975 |
| Tuscaloosa County | 482 | 44.6% | 54.8% | 0.6% | 1981 |
| Calhoun County | 386 | 32.9% | 63.2% | 3.9% | 1969 |
| Baldwin County | 381 | 48.3% | 50.4% | 1.3% | 1991 |
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 Mobile 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 Mobile County, both outside Alabama so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside AL (612 bridges here).
- Allen County, IN · 613 bridges
- Weld County, CO · 614 bridges
- Palm Beach County, FL · 610 bridges
- Monroe County, NY · 615 bridges
Similar average build year
Nearest mean year-built outside AL (1980 here).
- Tulsa County, OK · avg 1980 · 1,135 bridges
- Miami-Dade County, FL · avg 1980 · 1,057 bridges
- Pulaski County, AR · avg 1980 · 721 bridges
- McLennan County, TX · avg 1980 · 714 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Poor-condition bridges (17)
CRAFT HWY
PoorOver: TOULMIN SPRINGS
0.4 MI N US 45, Mobile, AL
Built 1943 Load: 0.0 t ADT: 11,232
MCGREGOR AVE
PoorOver: ESLAVA CREEK
0.3 MI N AIRPORT BLVD., Mobile, AL
Built 1964 Load: 0.0 t ADT: 19,384
RIVA ROAD
PoorOver: TRIBUTARY TO BAYOU CODEN
1300 N. OF U.S. HWY 188, Mobile, AL
Built 2007 Load: 0.0 t ADT: 138
WARREN STREET
PoorOver: PETERSON BRANCH
0.3 MI W WASSON AVE, Mobile, AL
Built 1965 Load: 1.8 t ADT: 502
TURNER ROAD
PoorOver: GUM TREE BRANCH
0.17 MI N E WHISTLER ST, Mobile, AL
Built 1973 Load: 1.8 t ADT: 2,512
WHISTLER ST
PoorOver: EIGHT MILE CREEK
0.8 MI W WASSON AVE, Mobile, AL
Built 1946 Load: 6.8 t ADT: 1,945
WASSON AVE
PoorOver: GUM TREE BRANCH
0.6 MI N TURNER RD, Mobile, AL
Built 1948 Load: 7.7 t ADT: 2,369
OLD HWY 43
PoorOver: DENNY BRANCH
0.38 MI N MILITARY RD, Mobile, AL
Built 1942 Load: 8.6 t ADT: 345
JEFF HAMILTON RD
PoorOver: DEAKLE CREEK
1.1 MI N CO 11, Mobile, AL
Built 1968 Load: 10.6 t ADT: 2,482
GULFCREST ROAD
PoorOver: CREEK
1.0 MI W US 45, Mobile, AL
Built 1954 Load: 12.9 t ADT: 616
W CLARK AVE
PoorOver: TOULMIN SPRINGS
0.2 MI E US 45, Mobile, AL
Built 1974 Load: 13.7 t ADT: 1,970
THOMAS AVE
PoorOver: TOULMIN SPRINGS
0.2 MI E US 45, Mobile, AL
Built 1974 Load: 15.3 t ADT: 446
W SWEENEYS LN
PoorOver: TOULMIN SPRINGS
0.17 MI N US 45, Mobile, AL
Built 1975 Load: 15.9 t ADT: 3,072
ROSEDALE AVE
PoorOver: TOULMIN SPRINGS
0.2 MI S MAGEE ST, Mobile, AL
Built 1974 Load: 16.3 t ADT: 861
LYONS ST
PoorOver: SNAKE BAYOU
0.5 MI W ALA 188, Mobile, AL
Built 1947 Load: 16.5 t ADT: 118
US 90 WB
PoorOver: TENSAW/SPANISH RIVER
MOBILE - BALD CO LINE, Mobile, AL
Built 1965 Load: 27.2 t ADT: 13,355
SR 193
PoorOver: MISS. SOUND * D.I. BAY
.80 MI N OF BIENVILLE AVE, Mobile, AL
Built 1982 Load: 30.3 t ADT: 5,641
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.