US Bridges

Rs 429 Smoky Val. over Gypsum Creek

FairPosted for load

McPherson County, Kansas · 1.1W of Roxbury · Structure no. 000000000590220

Built
1954
71 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
210 ft
5 main spans
Daily traffic
370
2020 count
Owner
County
County Highway Agency

About this bridge

Rs 429 Smoky Val. over Gypsum Creek is a concrete continuous slab carrying Rs 429 Smoky Val. over Gypsum Creek in McPherson County, Kansas. It was built in 1954, so it is 71 years old, older than the Kansas average of 52.8 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. Its operating status is: posted for load restriction.

It carries about 370 vehicles a day, roughly 12% of them trucks, projected to reach 550 by 2040. The structure is 210 ft (63.9 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesRs 429 Smoky Val.
CrossesGypsum Creek
Location1.1W of Roxbury
RouteCounty Highway 429
CountyMcPherson County
StateKansas
Coordinates38.55104, -97.44829
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.8 US tons
Inventory rating18.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length210 ft (63.9 m)
Longest span45 ft (13.7 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic370 (2020)
Projected traffic550 by 2040
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedDeck replacement with only incidental widening
Estimated improvement cost$600,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Rs 429 Smoky Val. over Gypsum Creek built?

It was built in 1954, making it 71 years old in 2025.

What condition is Rs 429 Smoky Val. over Gypsum 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 May 2023.

How much traffic does Rs 429 Smoky Val. over Gypsum Creek carry?

About 370 vehicles per day (2020 count), of which roughly 12% are trucks.

How long is Rs 429 Smoky Val. over Gypsum Creek?

The structure is 210 ft (63.9 m) long with a longest span of 45 ft (13.7 m) and a deck 29 ft wide.

Who owns Rs 429 Smoky Val. over Gypsum Creek?

It is owned by the County Highway Agency.