US Bridges

Franklin Street over Trib. to Prairie Dog Cr.

Fair

Thomas County, Kansas · City of Colby · Structure no. 505400970000002

Built
1950
75 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete
Length
37 ft
3 main spans
Daily traffic
4,800
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Franklin Street over Trib. to Prairie Dog Cr. is a concrete culvert carrying Franklin Street over Trib. to Prairie Dog Cr. in Thomas County, Kansas. It was built in 1950, so it is 75 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 4,800 vehicles a day, roughly 10% of them trucks, projected to reach 4,950 by 2044. The structure is 37 ft (11.2 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFranklin Street
CrossesTrib. to Prairie Dog Cr.
LocationCity of Colby
RouteCity Street 0
CountyThomas County
StateKansas
Coordinates39.3908, -101.04583
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 20
Structure length37 ft (11.2 m)
Longest span11 ft (3.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic4,800 (2020)
Projected traffic4,950 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Franklin Street over Trib. to Prairie Dog Cr. built?

It was built in 1950, making it 75 years old in 2025.

What condition is Franklin Street over Trib. to Prairie Dog Cr. 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 June 2024.

How much traffic does Franklin Street over Trib. to Prairie Dog Cr. carry?

About 4,800 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Franklin Street over Trib. to Prairie Dog Cr.?

The structure is 37 ft (11.2 m) long with a longest span of 11 ft (3.5 m).

Who owns Franklin Street over Trib. to Prairie Dog Cr.?

It is owned by the City or Municipal Highway Agency.