US Bridges

NW 30 ST over Rattlesnake Creek

Fair

Stafford County, Kansas · 1.1W of ST John · Structure no. 000000000930100

Built
1964
61 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete Continuous
Length
263 ft
7 main spans
Daily traffic
655
2021 count
Owner
County
County Highway Agency

About this bridge

NW 30 ST over Rattlesnake Creek is a concrete continuous slab carrying NW 30 ST over Rattlesnake Creek in Stafford County, Kansas. It was built in 1964, so it is 61 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 5 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 655 vehicles a day, roughly 10% of them trucks, projected to reach 785 by 2044. The structure is 263 ft (80.3 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNW 30 ST
CrossesRattlesnake Creek
Location1.1W of ST John
RouteCounty Highway 634
CountyStafford County
StateKansas
Coordinates37.99981, -98.79592
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no 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 alignment7: Better than present minimum criteria
Operating rating59.2 US tons
Inventory rating35.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadH 20
Structure length263 ft (80.3 m)
Longest span40 ft (12.1 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic655 (2021)
Projected traffic785 by 2044
Trucks10%
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 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 NW 30 ST over Rattlesnake Creek built?

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

What condition is NW 30 ST over Rattlesnake 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 November 2024.

How much traffic does NW 30 ST over Rattlesnake Creek carry?

About 655 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is NW 30 ST over Rattlesnake Creek?

The structure is 263 ft (80.3 m) long with a longest span of 40 ft (12.1 m) and a deck 30 ft wide.

Who owns NW 30 ST over Rattlesnake Creek?

It is owned by the County Highway Agency.