US Bridges

L-10-1004 over Airport Canal

Good

Charleston County, South Carolina · Johns Isl (trucklands) · Structure no. 000000000008980

Built
1996
29 years old
Condition
Good
inspected June 2023
Type
Slab
Prestressed Concrete
Length
34 ft
1 main span
Daily traffic
250
2023 count
Owner
County
County Highway Agency

About this bridge

L-10-1004 over Airport Canal is a prestressed concrete slab carrying L-10-1004 over Airport Canal in Charleston County, South Carolina. It was built in 1996, so it is 29 years old, younger than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 250 vehicles a day, roughly 5% of them trucks, projected to reach 320 by 2043. The structure is 34 ft (10.4 m) long and 19 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesL-10-1004
CrossesAirport Canal
LocationJohns Isl (trucklands)
RouteCounty Highway 1004
CountyCharleston County
StateSouth Carolina
Coordinates32.69277, -80.01189
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.9 US tons
Inventory rating39.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span34 ft (10.4 m)
Deck width19 ft (5.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2023)
Projected traffic320 by 2043
Trucks5%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$224,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was L-10-1004 over Airport Canal built?

It was built in 1996, making it 29 years old in 2025.

What condition is L-10-1004 over Airport Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

How much traffic does L-10-1004 over Airport Canal carry?

About 250 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is L-10-1004 over Airport Canal?

The structure is 34 ft (10.4 m) long with a longest span of 34 ft (10.4 m) and a deck 19 ft wide.

Who owns L-10-1004 over Airport Canal?

It is owned by the County Highway Agency.