US Bridges

Rs 308 RD B over Unnamed Stream

FairPosted for load

Hamilton County, Kansas · 7.0S of Coolidge · Structure no. 000000000380060

Built
1959
66 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete
Length
25 ft
3 main spans
Daily traffic
200
2022 count
Owner
County
County Highway Agency

About this bridge

Rs 308 RD B over Unnamed Stream is a concrete culvert carrying Rs 308 RD B over Unnamed Stream in Hamilton County, Kansas. It was built in 1959, so it is 66 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 200 vehicles a day, roughly 10% of them trucks, projected to reach 145 by 2041. The structure is 25 ft (7.6 m) long and 30 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesRs 308 RD B
CrossesUnnamed Stream
Location7.0S of Coolidge
RouteCounty Highway 308
CountyHamilton County
StateKansas
Coordinates37.94739, -102.01808
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating31.4 US tons
Inventory rating18.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length25 ft (7.6 m)
Longest span8 ft (2.4 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 traffic200 (2022)
Projected traffic145 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Rs 308 RD B over Unnamed Stream built?

It was built in 1959, making it 66 years old in 2025.

What condition is Rs 308 RD B over Unnamed Stream 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 2023.

How much traffic does Rs 308 RD B over Unnamed Stream carry?

About 200 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Rs 308 RD B over Unnamed Stream?

The structure is 25 ft (7.6 m) long with a longest span of 8 ft (2.4 m) and a deck 30 ft wide.

Who owns Rs 308 RD B over Unnamed Stream?

It is owned by the County Highway Agency.