US Bridges

SD027 over Marble Gulch

Fair

Marshall County, South Dakota · 2.9 S North Dakota Line · Structure no. 000000046170029

Built
1960
65 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete Continuous
Length
31 ft
3 main spans
Daily traffic
551
2024 count
Owner
State
State Highway Agency

About this bridge

SD027 over Marble Gulch is a concrete continuous culvert carrying SD027 over Marble Gulch in Marshall County, South Dakota. It was built in 1960, so it is 65 years old, older than the South Dakota average of 48.9 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 551 vehicles a day, roughly 32% of them trucks, projected to reach 648 by 2044. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 51 mi (82 km).

Location

Open in Google Maps
CarriesSD027
CrossesMarble Gulch
Location2.9 S North Dakota Line
RouteState Highway 27
CountyMarshall County
StateSouth Dakota
Coordinates45.89326, -97.62562
Functional classRural 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.9 US tons
Inventory rating26.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 15
Structure length31 ft (9.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic551 (2024)
Projected traffic648 by 2044
Trucks32%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed51 mi (82 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$12,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SD027 over Marble Gulch built?

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

What condition is SD027 over Marble Gulch 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 2024.

How much traffic does SD027 over Marble Gulch carry?

About 551 vehicles per day (2024 count), of which roughly 32% are trucks.

How long is SD027 over Marble Gulch?

The structure is 31 ft (9.4 m) long with a longest span of 10 ft (3 m).

Who owns SD027 over Marble Gulch?

It is owned by the State Highway Agency.