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.

Total bridges

612

Public highway bridges in Mobile County

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

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.

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

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.

Bridge inventory size and condition shares for Mobile County and the 5 Alabama counties closest to it in inventory size
County Bridges Poor
Madison County 710 1.3%
Mobile County (this page) 612 2.8%
Montgomery County 596 2.2%
Tuscaloosa County 482 0.6%
Calhoun County 386 3.9%
Baldwin County 381 1.3%

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).

Similar average build year

Nearest mean year-built outside AL (1980 here).

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

All 612 Good 129 Fair 466 Poor 17

Good-condition bridges (129)

SR 193

Good

Over: DELCHAMPS DITCH

2.3 MI N SR 188, Mobile, AL

Built 1995 Load: 23.6 t ADT: 4,420

SR 193

Good

Over: AUSTIN BAYOU

3.9 MI N SR 188, Mobile, AL

Built 1997 Load: 23.6 t ADT: 4,420

SR 188

Good

Over: HERON BAYOU

1.7 MI W SR 193, Mobile, AL

Built 1986 Load: 23.7 t ADT: 2,916

HIGHPOINT BLVD

Good

Over: UNNAMED BRANCH

0.9 MILES N. OF LOTT ROAD, Mobile, AL

Built 2004 Load: 25.9 t ADT: 3,000

BAY BR TO I-165 SB

Good

Over: BAY BRIDGE RD

I-165 @ BAY BRIDGE RD, Mobile, AL

Built 1993 Load: 28.2 t ADT: 2,670

ST. DOMINIC PLACE

Good

Over: DRAINAGE DITCH

157 E. BURMA HILLS EAST, Mobile, AL

Built 1960 Load: 28.4 t ADT: 138

BOWERS LANE

Good

Over: MUDDY CREEK

0.5 MI S OLD MILITARY RD, Mobile, AL

Built 1991 Load: 28.4 t ADT: 24

MIDDLE RD

Good

Over: TRIBUTARY TO RABBIT CREE

0.13 MI S OF I-10, Mobile, AL

Built 1996 Load: 29.5 t ADT: 371

SR 188

Good

Over: CODEN BAYOU

4.5 MI W CO RD 59, Mobile, AL

Built 1994 Load: 29.6 t ADT: 3,370

HOWARD MORRIS

Good

Over: JACKSON CREEK

0.5 MI N CO 63, Mobile, AL

Built 1991 Load: 29.8 t ADT: 35

NATCHEZ HWY

Good

Over: FLAT CREEK

1.3 MI S. US98, Mobile, AL

Built 2004 Load: 30.3 t ADT: 1,843

OLD PASCAGOULA RD

Good

Over: JACKSON CREEK

1.0 MI W OF MARCH RD, Mobile, AL

Built 2015 Load: 30.4 t ADT: 4,588

BELMONT PARK DRIVE

Good

Over: PRIVATE LAKE SPILLWAY

.2MI. W. OF MCDONALD RD, Mobile, AL

Built 2003 Load: 30.8 t ADT: 1,491

STONE HEDGE DR

Good

Over: SECOND CREEK

1ST DRAIN S OF GRELOT RD, Mobile, AL

Built 1998 Load: 30.9 t ADT: 912

US 98

Good

Over: ICG RR

0.7 MI E MISS ST LINE, Mobile, AL

Built 1983 Load: 31.5 t ADT: 11,132

US 45

Good

Over: WILLIAMS CREEK

1 MI N CO RD 55, Mobile, AL

Built 1991 Load: 31.7 t ADT: 8,582

US 45

Good

Over: OUTLAW STREAM

0.3 MI S SR 158, Mobile, AL

Built 1992 Load: 31.7 t ADT: 6,146

LISTER DAIRY ROAD

Good

Over: HARPERS BRANCH

850 S I65, Mobile, AL

Built 1970 Load: 32.2 t ADT: 699

WHISTLER TO I165NB

Good

Over: WHISTLER ST

I-165 @ WHISTLER ST, Mobile, AL

Built 1993 Load: 32.5 t ADT: 3,299

OLD SHELL ROAD

Good

Over: MILKHOUSE CREEK

0.6 MI E SCHILLENGER RD, Mobile, AL

Built 1985 Load: 32.7 t ADT: 17,553

SOUTH SERVICE RD.

Good

Over: DRAINAGE

1.3 MILES N. OF BAKER RD, Mobile, AL

Built 2008 Load: 32.7 t ADT: 53

SR 213

Good

Over: CHICKASAW CREEK

1.5 MI E JCT US 45, Mobile, AL

Built 2003 Load: 33.0 t ADT: 4,211

WILMER GEORGETOWN

Good

Over: BIG CREEK LAKE

.4 MILES W NATCHEZ TRACE, Mobile, AL

Built 2017 Load: 33.8 t ADT: 2,015

CEDAR STREET

Good

Over: DRAINAGE DITCH

.3 MI N. of CARL AVE., Mobile, AL

Built 1986 Load: 34.0 t ADT: 386

SR 193

Good

Over: WHITEHOUSE BAYOU

2.6 MI N SR 188, Mobile, AL

Built 1997 Load: 34.1 t ADT: 4,420

I165SB TO WHISTLER

Good

Over: WHISTLER ST

I165 @ WHISTLER ST, Mobile, AL

Built 1993 Load: 34.3 t ADT: 3,011

GRANDBAY WILMER S

Good

Over: BELL BRANCH

.7 MI S DAWES RD, Mobile, AL

Built 1984 Load: 34.5 t ADT: 5,927

COTTAGE HILL ROAD

Good

Over: SECOND CREEK

0.8 MI E OF SCHILLINGER, Mobile, AL

Built 2005 Load: 35.2 t ADT: 23,460

TANNER WILLIAMS RD

Good

Over: PIERCE CREEK

1.0 MI E OF SNOW RD, Mobile, AL

Built 1990 Load: 35.7 t ADT: 10,781

I165 SB TO FRTG RD

Good

Over: PRICE AVE

I165 @ PRICE AVE, Mobile, AL

Built 1993 Load: 35.8 t ADT: 1,438

DAWES RD

Good

Over: BRANCH OF TURKEY CREEK

300 S HOLLY POINT DR S, Mobile, AL

Built 1945 Load: 36.1 t ADT: 3,415

US 98

Good

Over: SCARBO CREEK

0.4 M East of Wilson RD, Mobile, AL

Built 2007 Load: 36.1 t ADT: 12,910

Future US98/SR158

Good

Over: SCARBO CREEK

0.4 M East of Wilson RD, Mobile, AL

Built 2007 Load: 36.1 t ADT: 12,910

US 43 SB

Good

Over: SISTERS CREEK

1.7 MI N CO RD 84, Mobile, AL

Built 2001 Load: 36.4 t ADT: 15,349

CODY RD N

Good

Over: MILKHOUSE CREEK

990 NORTH OF HITT RD, Mobile, AL

Built 2011 Load: 36.8 t ADT: 14,619

New US 98/SR 158

Good

Over: BIG CREEK

0.1 MI E Glenwood RD, Mobile, AL

Built 2008 Load: 37.1 t ADT: 16,939

SR 193 SB

Good

Over: RABBIT CREEK

1.6 MI N HAMILTON BLVD, Mobile, AL

Built 1999 Load: 37.4 t ADT: 11,422

SR 193 SB

Good

Over: RATTLESNAKE BAYOU

1.2 MI S I-10, Mobile, AL

Built 2000 Load: 37.4 t ADT: 11,422

GREEN TREE RD

Good

Over: SPENCERS BRANCH

0.2 MI E KNOLLWOOD DR, Mobile, AL

Built 1977 Load: 37.8 t ADT: 7,161

LOTT ROAD

Good

Over: ESCATAWPA RIVER

2.4 MI S OF CO. RD 96, Mobile, AL

Built 2005 Load: 37.8 t ADT: 648

GAILLARD DR RELIEF

Good

Over: THREE MILE CREEK

0.15 MILES N OF MUSEUM DR, Mobile, AL

Built 1999 Load: 38.2 t ADT: 906

ARGYLE ROAD

Good

Over: BISHOP MANOR CREEK

.19 MI. S. THREE MILE RD., Mobile, AL

Built 2005 Load: 38.3 t ADT: 2,210

VIADUCT RD

Good

Over: B-N * N-S RR SOUTH ST

0.2 MI E US 43, Mobile, AL

Built 2001 Load: 38.6 t ADT: 2,200

BILLY WALKER RD E

Good

Over: BENNETS CREEK

0.8 MILES N/LONNIE WALKER, Mobile, AL

Built 2011 Load: 38.6 t ADT: 119

KELLY TRAIL

Good

Over: LOG CREEK

2.7 MI S CELESTE ROAD, Mobile, AL

Built 2011 Load: 38.6 t ADT: 25

_SUNSET ROAD

Good

Over: _S FORK DEER RIVER

_0.4 MI W AL 163, Mobile, AL

Built 2022 Load: 38.7 t ADT: 20

AL. 158 WBL

Good

Over: CHICKASAW CREEK

.5 MI. E. US 45, Mobile, AL

Built 2013 Load: 39.0 t ADT: 13,067

Glenwood Road

Good

Over: SR 158

1.4 M NORTH OF US 98, Mobile, AL

Built 2023 Load: 39.6 t ADT: 1,797

AL. 158 W.B.

Good

Over: US. 45

US 45 @ AL. 158, Mobile, AL

Built 2007 Load: 39.7 t ADT: 7,816

AL 158 E.B.

Good

Over: US 45

AL. 158 AND US 45 INTCH, Mobile, AL

Built 2007 Load: 39.7 t ADT: 7,816

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.