US Bridges

Zirlot Road over Bayou Grande

Fair

Mobile County, Alabama · 1.6 MI N HWY 188 · Structure no. 015365

Built
1991
34 years old
Condition
Fair
inspected March 2024
Type
Channel Beam
Concrete
Length
68 ft
2 main spans
Daily traffic
56
2024 count
Owner
County
County Highway Agency

About this bridge

Zirlot Road over Bayou Grande is a concrete channel beam carrying Zirlot Road over Bayou Grande in Mobile County, Alabama. It was built in 1991, so it is 34 years old, younger than the Alabama average of 51.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 56 vehicles a day, roughly 10% of them trucks, projected to reach 83 by 2044. The structure is 68 ft (20.7 m) long and 25 ft wide.

Location

Open in Google Maps
CarriesZirlot Road
CrossesBayou Grande
Location1.6 MI N HWY 188
RouteCounty Highway 0
CountyMobile County
StateAlabama
Coordinates30.38906, -88.13646
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.5 US tons
Inventory rating44.8 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length68 ft (20.7 m)
Longest span34 ft (10.4 m)
Deck width25 ft (7.6 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic56 (2024)
Projected traffic83 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$536,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Zirlot Road over Bayou Grande built?

It was built in 1991, making it 34 years old in 2025.

What condition is Zirlot Road over Bayou Grande in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2024.

How much traffic does Zirlot Road over Bayou Grande carry?

About 56 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Zirlot Road over Bayou Grande?

The structure is 68 ft (20.7 m) long with a longest span of 34 ft (10.4 m) and a deck 25 ft wide.

Who owns Zirlot Road over Bayou Grande?

It is owned by the County Highway Agency.