US Bridges

IRR Indian 20 HWY over Delaware River Drainage

Fair

Brown County, Kansas · 5.06 MI E US75 · Structure no. 999902000070271

Built
1935
90 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
1,212
2023 count
Owner
State
State Highway Agency

About this bridge

IRR Indian 20 HWY over Delaware River Drainage is a concrete culvert carrying IRR Indian 20 HWY over Delaware River Drainage in Brown County, Kansas. It was built in 1935, so it is 90 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.

It carries about 1,212 vehicles a day, roughly 15% of them trucks, projected to reach 1,236 by 2044. The structure is 25 ft (7.6 m) long and 34 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

Open in Google Maps
CarriesIRR Indian 20 HWY
CrossesDelaware River Drainage
Location5.06 MI E US75
RouteState Highway 20
CountyBrown County
StateKansas
Coordinates39.66722, -95.63583
Functional classRural Minor Arterial

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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating32.2 US tons
Inventory rating19 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,212 (2023)
Projected traffic1,236 by 2044
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 IRR Indian 20 HWY over Delaware River Drainage built?

It was built in 1935, making it 90 years old in 2025.

What condition is IRR Indian 20 HWY over Delaware River Drainage 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 June 2023.

How much traffic does IRR Indian 20 HWY over Delaware River Drainage carry?

About 1,212 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is IRR Indian 20 HWY over Delaware River Drainage?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m) and a deck 34 ft wide.

Who owns IRR Indian 20 HWY over Delaware River Drainage?

It is owned by the State Highway Agency.