US Bridges

S-40-1705 over Windsor Lake

Fair

Richland County, South Carolina · 1.0 MI NE of Dentsville · Structure no. 000000000007836

Built
1984
41 years old
Condition
Fair
inspected February 2023
Type
Slab
Concrete Continuous
Length
300 ft
10 main spans
Daily traffic
2,400
2023 count
Owner
State
State Highway Agency

About this bridge

S-40-1705 over Windsor Lake is a concrete continuous slab carrying S-40-1705 over Windsor Lake in Richland County, South Carolina. It was built in 1984, so it is 41 years old, younger 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 2,400 vehicles a day, roughly 5% of them trucks, projected to reach 3,072 by 2043. The structure is 300 ft (91.4 m) long and 38 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesS-40-1705
CrossesWindsor Lake
Location1.0 MI NE of Dentsville
RouteState Highway 1705
CountyRichland County
StateSouth Carolina
Coordinates34.07326, -80.92969
Functional classUrban 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
Deck7 GoodSome minor problems.
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 inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.1 US tons
Inventory rating58.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20 + Mod
Structure length300 ft (91.4 m)
Longest span30 ft (9.1 m)
Deck width38 ft (11.5 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,400 (2023)
Projected traffic3,072 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

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-40-1705 over Windsor Lake built?

It was built in 1984, making it 41 years old in 2025.

What condition is S-40-1705 over Windsor Lake 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 February 2023.

How much traffic does S-40-1705 over Windsor Lake carry?

About 2,400 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is S-40-1705 over Windsor Lake?

The structure is 300 ft (91.4 m) long with a longest span of 30 ft (9.1 m) and a deck 38 ft wide.

Who owns S-40-1705 over Windsor Lake?

It is owned by the State Highway Agency.