US Bridges

US77 HWY SB over BNSF Railway

Fair

Cowley County, Kansas · 10.42 MI N US166 SB · Structure no. 999907700180071

Built
1972
53 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
205 ft
3 main spans
Daily traffic
5,944
2023 count
Owner
State
State Highway Agency

About this bridge

US77 HWY SB over BNSF Railway is a steel continuous stringer/multi-beam or girder carrying US77 HWY SB over BNSF Railway in Cowley County, Kansas. It was built in 1972, so it is 53 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 5 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 5,944 vehicles a day, roughly 12% of them trucks, projected to reach 7,253 by 2044. The structure is 205 ft (62.5 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesUS77 HWY SB
CrossesBNSF Railway
Location10.42 MI N US166 SB
RouteU.S. Route 77
CountyCowley County
StateKansas
Coordinates37.20083, -97.0125
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length205 ft (62.5 m)
Longest span80 ft (24.4 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 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
CrossesRailroad
Detour if closed1.2 mi (2 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 US77 HWY SB over BNSF Railway built?

It was built in 1972, making it 53 years old in 2025.

What condition is US77 HWY SB over BNSF Railway 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 September 2023.

How much traffic does US77 HWY SB over BNSF Railway carry?

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

How long is US77 HWY SB over BNSF Railway?

The structure is 205 ft (62.5 m) long with a longest span of 80 ft (24.4 m) and a deck 42 ft wide.

Who owns US77 HWY SB over BNSF Railway?

It is owned by the State Highway Agency.