US Bridges

US77 HWY over Smoky Hill River

Fair

Geary County, Kansas · 1.47 MI S I70 · Structure no. 999907700310401

Built
1953
72 years old, rebuilt 1994
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
732 ft
6 main spans
Daily traffic
5,828
2023 count
Owner
State
State Highway Agency

About this bridge

US77 HWY over Smoky Hill River is a steel continuous stringer/multi-beam or girder carrying US77 HWY over Smoky Hill River in Geary County, Kansas. It was built in 1953 and reconstructed in 1994, so it is 72 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 5,828 vehicles a day, roughly 6% of them trucks, projected to reach 6,439 by 2044. The structure is 732 ft (223.2 m) long and 46 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesUS77 HWY
CrossesSmoky Hill River
Location1.47 MI S I70
RouteU.S. Route 77
StateKansas
Coordinates38.97861, -96.85694
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 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 geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating39 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length732 ft (223.2 m)
Longest span130 ft (39.6 m)
Deck width46 ft (14 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,828 (2023)
Projected traffic6,439 by 2044
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 over Smoky Hill River built?

It was built in 1953, making it 72 years old in 2025. It was reconstructed in 1994.

What condition is US77 HWY over Smoky Hill River 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 October 2023.

How much traffic does US77 HWY over Smoky Hill River carry?

About 5,828 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is US77 HWY over Smoky Hill River?

The structure is 732 ft (223.2 m) long with a longest span of 130 ft (39.6 m) and a deck 46 ft wide.

Who owns US77 HWY over Smoky Hill River?

It is owned by the State Highway Agency.