US Bridges

Deer Valley Road over Creek

Fair

Lyman County, South Dakota · 4.8W & 7.8S of Reliance · Structure no. 000000043332298

Built
1940
85 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
59 ft
3 main spans
Daily traffic
25
2022 count
Owner
County
County Highway Agency

About this bridge

Deer Valley Road over Creek is a steel stringer/multi-beam or girder carrying Deer Valley Road over Creek in Lyman County, South Dakota. It was built in 1940, so it is 85 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 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 25 vehicles a day, roughly 8% of them trucks, projected to reach 25 by 2033. The structure is 59 ft (18 m) long and 22 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesDeer Valley Road
CrossesCreek
Location4.8W & 7.8S of Reliance
RouteCounty Highway 0
Coordinates43.76254, -99.69841
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51.3 US tons
Inventory rating39.6 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans3
Design loadUnknown
Structure length59 ft (18 m)
Longest span30 ft (9.1 m)
Deck width22 ft (6.7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2022)
Projected traffic25 by 2033
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Deer Valley Road over Creek built?

It was built in 1940, making it 85 years old in 2025.

What condition is Deer Valley Road over Creek 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 July 2024.

How much traffic does Deer Valley Road over Creek carry?

About 25 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Deer Valley Road over Creek?

The structure is 59 ft (18 m) long with a longest span of 30 ft (9.1 m) and a deck 22 ft wide.

Who owns Deer Valley Road over Creek?

It is owned by the County Highway Agency.