US Bridges

Perimeter Road over Admirals Ditch

FairPosted for load

Berkeley County, South Carolina · 1.9 Miles East of North P · Structure no. AFSCDKGV00001

Built
1967
58 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
55 ft
4 main spans
Daily traffic
20
2015 count
Owner
Federal
Air Force

About this bridge

Perimeter Road over Admirals Ditch is a wood or timber stringer/multi-beam or girder carrying Perimeter Road over Admirals Ditch in Berkeley County, South Carolina. It was built in 1967, so it is 58 years old, older than the South Carolina average of 48 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. Its operating status is: posted for load restriction.

It carries about 20 vehicles a day, projected to reach 24 by 2035. The structure is 55 ft (16.8 m) long and 16 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesPerimeter Road
CrossesAdmirals Ditch
Location1.9 Miles East of North P
RouteFederal Lands Road 0
CountyBerkeley County
StateSouth Carolina
Coordinates33.01978, -79.9605
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating9 US tons
Inventory rating6.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadUnknown
Structure length55 ft (16.8 m)
Longest span14 ft (4.3 m)
Deck width16 ft (4.8 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2015)
Projected traffic24 by 2035
Trucks—
Lanes on structure1
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

OwnerAir Force
Maintained byAir Force
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Perimeter Road over Admirals Ditch built?

It was built in 1967, making it 58 years old in 2025.

What condition is Perimeter Road over Admirals 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 May 2024.

How much traffic does Perimeter Road over Admirals Ditch carry?

About 20 vehicles per day (2015 count).

How long is Perimeter Road over Admirals Ditch?

The structure is 55 ft (16.8 m) long with a longest span of 14 ft (4.3 m) and a deck 16 ft wide.

Who owns Perimeter Road over Admirals Ditch?

It is owned by the Air Force.