US Bridges

Rs 489 KO-1 over Trib. to Nemaha River

Good

Nemaha County, Kansas · 0.5W of Kelly · Structure no. 000000000660120

Built
1990
35 years old
Condition
Good
inspected March 2024
Type
Slab
Concrete Continuous
Length
132 ft
3 main spans
Daily traffic
166
2008 count
Owner
County
County Highway Agency

About this bridge

Rs 489 KO-1 over Trib. to Nemaha River is a concrete continuous slab carrying Rs 489 KO-1 over Trib. to Nemaha River in Nemaha County, Kansas. It was built in 1990, so it is 35 years old, younger than the Kansas average of 52.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 166 vehicles a day, roughly 10% of them trucks, projected to reach 175 by 2044. The structure is 132 ft (40.3 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesRs 489 KO-1
CrossesTrib. to Nemaha River
Location0.5W of Kelly
RouteCounty Highway 489
StateKansas
Coordinates39.73988, -96.00689
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.4 US tons
Inventory rating40.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length132 ft (40.3 m)
Longest span52 ft (15.7 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (8 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic166 (2008)
Projected traffic175 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 Rs 489 KO-1 over Trib. to Nemaha River built?

It was built in 1990, making it 35 years old in 2025.

What condition is Rs 489 KO-1 over Trib. to Nemaha River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.

How much traffic does Rs 489 KO-1 over Trib. to Nemaha River carry?

About 166 vehicles per day (2008 count), of which roughly 10% are trucks.

How long is Rs 489 KO-1 over Trib. to Nemaha River?

The structure is 132 ft (40.3 m) long with a longest span of 52 ft (15.7 m) and a deck 28 ft wide.

Who owns Rs 489 KO-1 over Trib. to Nemaha River?

It is owned by the County Highway Agency.