US Bridges

US77 HWY over Lyon Creek

Good

Geary County, Kansas · 5.51 MI N Morris CO Line · Structure no. 999907700310661

Built
1984
41 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
344 ft
5 main spans
Daily traffic
2,822
2023 count
Owner
State
State Highway Agency

About this bridge

US77 HWY over Lyon Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying US77 HWY over Lyon Creek in Geary County, Kansas. It was built in 1984, so it is 41 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 2,822 vehicles a day, roughly 10% of them trucks, projected to reach 3,801 by 2044. The structure is 344 ft (104.7 m) long and 46 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesUS77 HWY
CrossesLyon Creek
Location5.51 MI N Morris CO Line
RouteU.S. Route 77
CountyGeary County
StateKansas
Coordinates38.94889, -96.85806
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating84 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans5
Design loadHS 20
Structure length344 ft (104.7 m)
Longest span77 ft (23.5 m)
Deck width46 ft (14 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,822 (2023)
Projected traffic3,801 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 Lyon Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is US77 HWY over Lyon Creek 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 October 2023.

How much traffic does US77 HWY over Lyon Creek carry?

About 2,822 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is US77 HWY over Lyon Creek?

The structure is 344 ft (104.7 m) long with a longest span of 77 ft (23.5 m) and a deck 46 ft wide.

Who owns US77 HWY over Lyon Creek?

It is owned by the State Highway Agency.