US Bridges

L-1214/PONSBURY RD over Canal

Good

Charleston County, South Carolina · Mount Pleasant · Structure no. 000000000010460

Built
1999
26 years old
Condition
Good
inspected July 2023
Type
Culvert
Concrete
Length
21 ft
1 main span
Daily traffic
600
2023 count
Owner
County
County Highway Agency

About this bridge

L-1214/PONSBURY RD over Canal is a concrete culvert carrying L-1214/PONSBURY RD over Canal in Charleston County, South Carolina. It was built in 1999, so it is 26 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 600 vehicles a day, roughly 5% of them trucks, projected to reach 768 by 2043. The structure is 21 ft (6.4 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesL-1214/PONSBURY RD
CrossesCanal
LocationMount Pleasant
RouteCounty Highway 1214
Coordinates32.81624, -79.87706
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.5 US tons
Inventory rating35.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width29 ft (8.8 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2023)
Projected traffic768 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$105,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was L-1214/PONSBURY RD over Canal built?

It was built in 1999, making it 26 years old in 2025.

What condition is L-1214/PONSBURY RD over 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 July 2023.

How much traffic does L-1214/PONSBURY RD over Canal carry?

About 600 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is L-1214/PONSBURY RD over Canal?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m) and a deck 29 ft wide.

Who owns L-1214/PONSBURY RD over Canal?

It is owned by the County Highway Agency.