US Bridges

FAS 6247 over Bear Creek

PoorPosted for load

Dewey County, South Dakota · 0.7 W 3.1 N Lantry · Structure no. 000000021030282

Built
1960
65 years old
Condition
Poor
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
149 ft
3 main spans
Daily traffic
103
2022 count
Owner
County
County Highway Agency

About this bridge

FAS 6247 over Bear Creek is a steel stringer/multi-beam or girder carrying FAS 6247 over Bear Creek in Dewey 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 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. Its operating status is: posted for load restriction.

It carries about 103 vehicles a day, roughly 3% of them trucks, projected to reach 103 by 2032. The structure is 149 ft (45.4 m) long and 26 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

CarriesFAS 6247
CrossesBear Creek
Location0.7 W 3.1 N Lantry
RouteCounty Highway 0
Coordinates45.06391, -101.4444
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating22.5 US tons
Inventory rating17.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length149 ft (45.4 m)
Longest span49 ft (14.9 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic103 (2022)
Projected traffic103 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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$2.9 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 6247 over Bear Creek built?

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

What condition is FAS 6247 over Bear Creek 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 FAS 6247 over Bear Creek carry?

About 103 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is FAS 6247 over Bear Creek?

The structure is 149 ft (45.4 m) long with a longest span of 49 ft (14.9 m) and a deck 26 ft wide.

Who owns FAS 6247 over Bear Creek?

It is owned by the County Highway Agency.