US Bridges

US 77 HWY SB over Walnut Riv & Local RD

Good

Cowley County, Kansas · 1.11 MI S of JCT US160 · Structure no. 999907700180091

Built
1939
86 years old, rebuilt 1999
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
491 ft
5 main spans
Daily traffic
5,944
2023 count
Owner
State
State Highway Agency

About this bridge

US 77 HWY SB over Walnut Riv & Local RD is a steel continuous stringer/multi-beam or girder carrying US 77 HWY SB over Walnut Riv & Local RD in Cowley County, Kansas. It was built in 1939 and reconstructed in 1999, so it is 86 years old, older 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 5,944 vehicles a day, roughly 12% of them trucks, projected to reach 7,253 by 2044. The structure is 491 ft (149.7 m) long and 54 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesUS 77 HWY SB
CrossesWalnut Riv & Local RD
Location1.11 MI S of JCT US160
RouteU.S. Route 77
StateKansas
Coordinates37.22361, -96.99528
Functional classRural Principal Arterial - Other

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 protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93 US tons
Inventory rating56 US tons

Structure

MaterialSteel Continuous
DeckNot applicable
Main spans5
Design loadH 15
Structure length491 ft (149.7 m)
Longest span125 ft (38.1 m)
Deck width54 ft (16.5 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,944 (2023)
Projected traffic7,253 by 2044
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

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 US 77 HWY SB over Walnut Riv & Local RD built?

It was built in 1939, making it 86 years old in 2025. It was reconstructed in 1999.

What condition is US 77 HWY SB over Walnut Riv & Local RD 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 September 2023.

How much traffic does US 77 HWY SB over Walnut Riv & Local RD carry?

About 5,944 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is US 77 HWY SB over Walnut Riv & Local RD?

The structure is 491 ft (149.7 m) long with a longest span of 125 ft (38.1 m) and a deck 54 ft wide.

Who owns US 77 HWY SB over Walnut Riv & Local RD?

It is owned by the State Highway Agency.