US Bridges

US 90 W to I-10 W over Rattlesnake Branch

Fair

Mobile County, Alabama · I-10 @ US 90 Interchange · Structure no. 008135

Built
1964
61 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete
Length
59 ft
4 main spans
Daily traffic
3,261
2022 count
Owner
State
State Highway Agency

About this bridge

US 90 W to I-10 W over Rattlesnake Branch is a concrete culvert carrying US 90 W to I-10 W over Rattlesnake Branch in Mobile County, Alabama. It was built in 1964, so it is 61 years old, older 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 5 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 3,261 vehicles a day, roughly 6% of them trucks, projected to reach 4,891 by 2042. The structure is 59 ft (18 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesUS 90 W to I-10 W
CrossesRattlesnake Branch
LocationI-10 @ US 90 Interchange
RouteInterstate 10
CountyMobile County
StateAlabama
Coordinates30.58348, -88.16974
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60.4 US tons
Inventory rating36.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length59 ft (18 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,261 (2022)
Projected traffic4,891 by 2042
Trucks6%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$1.1 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 90 W to I-10 W over Rattlesnake Branch built?

It was built in 1964, making it 61 years old in 2025.

What condition is US 90 W to I-10 W over Rattlesnake Branch 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 November 2023.

How much traffic does US 90 W to I-10 W over Rattlesnake Branch carry?

About 3,261 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is US 90 W to I-10 W over Rattlesnake Branch?

The structure is 59 ft (18 m) long with a longest span of 10 ft (3 m).

Who owns US 90 W to I-10 W over Rattlesnake Branch?

It is owned by the State Highway Agency.