US Bridges

610 S. Egan Avenue over Silver Ck

Fair

Lake County, South Dakota · Egan Ave S - Madison · Structure no. 000000040128137

Built
1979
46 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete Continuous
Length
30 ft
3 main spans
Daily traffic
2,915
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

610 S. Egan Avenue over Silver Ck is a concrete continuous culvert carrying 610 S. Egan Avenue over Silver Ck in Lake County, South Dakota. It was built in 1979, so it is 46 years old, younger 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 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 2,915 vehicles a day, roughly 1% of them trucks, projected to reach 2,915 by 2032. The structure is 30 ft (9.1 m) long and 47 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Carries610 S. Egan Avenue
CrossesSilver Ck
LocationEgan Ave S - Madison
RouteCity Street 0
Coordinates43.99889, -97.11401
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length30 ft (9.1 m)
Longest span9 ft (2.7 m)
Deck width47 ft (14.3 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,915 (2022)
Projected traffic2,915 by 2032
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$10,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 610 S. Egan Avenue over Silver Ck built?

It was built in 1979, making it 46 years old in 2025.

What condition is 610 S. Egan Avenue over Silver 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 August 2023.

How much traffic does 610 S. Egan Avenue over Silver Ck carry?

About 2,915 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is 610 S. Egan Avenue over Silver Ck?

The structure is 30 ft (9.1 m) long with a longest span of 9 ft (2.7 m) and a deck 47 ft wide.

Who owns 610 S. Egan Avenue over Silver Ck?

It is owned by the City or Municipal Highway Agency.