US Bridges

Manilla Road over Plum Ck

Fair

Haakon County, South Dakota · 2.9W 8.9 S Kirley · Structure no. 000000028315242

Built
1975
50 years old
Condition
Fair
inspected September 2024
Type
Culvert
Steel
Length
24 ft
1 main span
Daily traffic
28
2022 count
Owner
County
County Highway Agency

About this bridge

Manilla Road over Plum Ck is a steel culvert carrying Manilla Road over Plum Ck in Haakon County, South Dakota. It was built in 1975, so it is 50 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 28 vehicles a day, roughly 3% of them trucks, projected to reach 28 by 2032. The structure is 24 ft (7.3 m) long.

Location

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CarriesManilla Road
CrossesPlum Ck
Location2.9W 8.9 S Kirley
RouteCounty Highway 0
CountyHaakon County
StateSouth Dakota
Coordinates44.40352, -101.36366
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28 (2022)
Projected traffic28 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$2,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Manilla Road over Plum Ck built?

It was built in 1975, making it 50 years old in 2025.

What condition is Manilla Road over Plum Ck 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 September 2024.

How much traffic does Manilla Road over Plum Ck carry?

About 28 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Manilla Road over Plum Ck?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m).

Who owns Manilla Road over Plum Ck?

It is owned by the County Highway Agency.