US Bridges

Thornton Place over Bolton Branch

Fair

Mobile County, Alabama · 200 N Yorkshire Lane · Structure no. 010575

Built
1971
54 years old
Condition
Fair
inspected October 2023
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
2,030
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Thornton Place over Bolton Branch is a concrete culvert carrying Thornton Place over Bolton Branch in Mobile County, Alabama. It was built in 1971, so it is 54 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 2,030 vehicles a day, roughly 1% of them trucks, projected to reach 3,046 by 2043. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesThornton Place
CrossesBolton Branch
Location200 N Yorkshire Lane
RouteCity Street 0
CountyMobile County
StateAlabama
Coordinates30.66459, -88.15609
Functional classUrban 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
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86.1 US tons
Inventory rating51.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length26 ft (7.9 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,030 (2023)
Projected traffic3,046 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost$449,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Thornton Place over Bolton Branch built?

It was built in 1971, making it 54 years old in 2025.

What condition is Thornton Place over Bolton 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 October 2023.

How much traffic does Thornton Place over Bolton Branch carry?

About 2,030 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Thornton Place over Bolton Branch?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m).

Who owns Thornton Place over Bolton Branch?

It is owned by the City or Municipal Highway Agency.