US Bridges

311 Avenue over South Medicine Ck

Poor

Hughes County, South Dakota · 2 E 1.1 N Blunt · Structure no. 000000033310009

Built
1964
61 years old
Condition
Poor
inspected June 2024
Type
Channel Beam
Concrete
Length
63 ft
2 main spans
Daily traffic
96
2022 count
Owner
County
County Highway Agency

About this bridge

311 Avenue over South Medicine Ck is a concrete channel beam carrying 311 Avenue over South Medicine Ck in Hughes County, South Dakota. It was built in 1964, so it is 61 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 96 vehicles a day, roughly 3% of them trucks, projected to reach 96 by 2032. The structure is 63 ft (19.2 m) long and 32 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Carries311 Avenue
CrossesSouth Medicine Ck
Location2 E 1.1 N Blunt
RouteCounty Highway 0
Coordinates44.52948, -99.94698
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length63 ft (19.2 m)
Longest span62 ft (18.9 m)
Deck width32 ft (9.7 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic96 (2022)
Projected traffic96 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$4,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 311 Avenue over South Medicine Ck built?

It was built in 1964, making it 61 years old in 2025.

What condition is 311 Avenue over South Medicine Ck in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does 311 Avenue over South Medicine Ck carry?

About 96 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 311 Avenue over South Medicine Ck?

The structure is 63 ft (19.2 m) long with a longest span of 62 ft (18.9 m) and a deck 32 ft wide.

Who owns 311 Avenue over South Medicine Ck?

It is owned by the County Highway Agency.