US Bridges

S-857/RUTLEDGE RD over Montgomery Creek

Fair

Charleston County, South Carolina · 7.2 MI N Mcclellanville · Structure no. 000000000003211

Built
1960
65 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete
Length
70 ft
5 main spans
Daily traffic
600
2023 count
Owner
State
State Highway Agency

About this bridge

S-857/RUTLEDGE RD over Montgomery Creek is a concrete slab carrying S-857/RUTLEDGE RD over Montgomery Creek in Charleston County, South Carolina. It was built in 1960, so it is 65 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 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 600 vehicles a day, roughly 8% of them trucks, projected to reach 876 by 2043. The structure is 70 ft (21.3 m) long and 28 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

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CarriesS-857/RUTLEDGE RD
CrossesMontgomery Creek
Location7.2 MI N Mcclellanville
RouteState Highway 857
CountyCharleston County
StateSouth Carolina
Coordinates33.1873, -79.43257
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating29.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans5
Design loadH 15
Structure length70 ft (21.3 m)
Longest span14 ft (4.3 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2023)
Projected traffic876 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
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 S-857/RUTLEDGE RD over Montgomery Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is S-857/RUTLEDGE RD over Montgomery Creek 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 June 2023.

How much traffic does S-857/RUTLEDGE RD over Montgomery Creek carry?

About 600 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is S-857/RUTLEDGE RD over Montgomery Creek?

The structure is 70 ft (21.3 m) long with a longest span of 14 ft (4.3 m) and a deck 28 ft wide.

Who owns S-857/RUTLEDGE RD over Montgomery Creek?

It is owned by the State Highway Agency.