US Bridges

Dauphin Street over Drainage Ditch

Fair

Mobile County, Alabama · 1033 E I65 · Structure no. 008400

Built
1964
61 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete
Length
32 ft
3 main spans
Daily traffic
31,399
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Dauphin Street over Drainage Ditch is a concrete culvert carrying Dauphin Street over Drainage Ditch 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 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 31,399 vehicles a day, roughly 4% of them trucks, projected to reach 47,098 by 2044. The structure is 32 ft (9.8 m) long and 168 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesDauphin Street
CrossesDrainage Ditch
Location1033 E I65
RouteCity Street 0
StateAlabama
Coordinates30.68887, -88.12316
Functional classUrban Minor Arterial

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.3 US tons
Inventory rating27.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span10 ft (3 m)
Deck width168 ft (51.3 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,399 (2024)
Projected traffic47,098 by 2044
Trucks4%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.2 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Dauphin Street over Drainage Ditch built?

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

What condition is Dauphin Street over Drainage Ditch 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 January 2024.

How much traffic does Dauphin Street over Drainage Ditch carry?

About 31,399 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is Dauphin Street over Drainage Ditch?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m) and a deck 168 ft wide.

Who owns Dauphin Street over Drainage Ditch?

It is owned by the City or Municipal Highway Agency.