US Bridges

LB-7 Main Entrance over South Basin

Good

Leavenworth County, Kansas · Main Ent. to Lansing Park · Structure no. 515150520000110

Built
2011
14 years old
Condition
Good
inspected January 2025
Type
Truss - Thru
Steel
Length
68 ft
1 main span
Daily traffic
50
2011 count
Owner
City
City or Municipal Highway Agency

About this bridge

LB-7 Main Entrance over South Basin is a steel truss - thru carrying LB-7 Main Entrance over South Basin in Leavenworth County, Kansas. It was built in 2011, so it is 14 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 50 vehicles a day, roughly 2% of them trucks, projected to reach 100 by 2039. The structure is 68 ft (20.7 m) long and 29 ft wide. If it were closed, the detour would be 198.8 mi (320 km).

Location

Open in Google Maps
CarriesLB-7 Main Entrance
CrossesSouth Basin
LocationMain Ent. to Lansing Park
RouteCity Street 0
CountyLeavenworth County
StateKansas
Coordinates39.23167, -94.94265
Functional classRural Local

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 inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.6 US tons
Inventory rating45 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length68 ft (20.7 m)
Longest span63 ft (19.2 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic50 (2011)
Projected traffic100 by 2039
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed198.8 mi (320 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 LB-7 Main Entrance over South Basin built?

It was built in 2011, making it 14 years old in 2025.

What condition is LB-7 Main Entrance over South Basin 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 January 2025.

How much traffic does LB-7 Main Entrance over South Basin carry?

About 50 vehicles per day (2011 count), of which roughly 2% are trucks.

How long is LB-7 Main Entrance over South Basin?

The structure is 68 ft (20.7 m) long with a longest span of 63 ft (19.2 m) and a deck 29 ft wide.

Who owns LB-7 Main Entrance over South Basin?

It is owned by the City or Municipal Highway Agency.