US Bridges

US81 HWY over Ninnescah River

Good

Sumner County, Kansas · 0.27 MI W of K-55 · Structure no. 999908100961321

Built
1983
42 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
452 ft
6 main spans
Daily traffic
3,735
2023 count
Owner
State
State Highway Agency

About this bridge

US81 HWY over Ninnescah River is a steel continuous stringer/multi-beam or girder carrying US81 HWY over Ninnescah River in Sumner County, Kansas. It was built in 1983, so it is 42 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 3,735 vehicles a day, roughly 17% of them trucks, projected to reach 4,045 by 2044. The structure is 452 ft (137.9 m) long and 46 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesUS81 HWY
CrossesNinnescah River
Location0.27 MI W of K-55
RouteU.S. Route 81
StateKansas
Coordinates37.39139, -97.33833
Functional classRural Minor Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating95 US tons
Inventory rating57 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length452 ft (137.9 m)
Longest span80 ft (24.4 m)
Deck width46 ft (14 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,735 (2023)
Projected traffic4,045 by 2044
Trucks17%
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

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 US81 HWY over Ninnescah River built?

It was built in 1983, making it 42 years old in 2025.

What condition is US81 HWY over Ninnescah 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 August 2023.

How much traffic does US81 HWY over Ninnescah River carry?

About 3,735 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is US81 HWY over Ninnescah River?

The structure is 452 ft (137.9 m) long with a longest span of 80 ft (24.4 m) and a deck 46 ft wide.

Who owns US81 HWY over Ninnescah River?

It is owned by the State Highway Agency.