US Bridges

S-23-920 over Mountain Creek

Fair

Greenville County, South Carolina · 5.8 MI NE Greenville · Structure no. 000000000006871

Built
1976
49 years old
Condition
Fair
inspected June 2023
Type
Channel Beam
Prestressed Concrete
Length
90 ft
3 main spans
Daily traffic
8,700
2023 count
Owner
State
State Highway Agency

About this bridge

S-23-920 over Mountain Creek is a prestressed concrete channel beam carrying S-23-920 over Mountain Creek in Greenville County, South Carolina. It was built in 1976, so it is 49 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.

It carries about 8,700 vehicles a day, roughly 3% of them trucks, projected to reach 11,049 by 2043. The structure is 90 ft (27.4 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesS-23-920
CrossesMountain Creek
Location5.8 MI NE Greenville
RouteState Highway 920
CountyGreenville County
StateSouth Carolina
Coordinates34.92804, -82.34426
Functional classUrban Minor Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 23 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.7 US tons
Inventory rating14.3 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadH 15
Structure length90 ft (27.4 m)
Longest span30 ft (9.1 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,700 (2023)
Projected traffic11,049 by 2043
Trucks3%
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$308,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was S-23-920 over Mountain Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is S-23-920 over Mountain 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-23-920 over Mountain Creek carry?

About 8,700 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is S-23-920 over Mountain Creek?

The structure is 90 ft (27.4 m) long with a longest span of 30 ft (9.1 m) and a deck 34 ft wide.

Who owns S-23-920 over Mountain Creek?

It is owned by the State Highway Agency.