US Bridges

KY-550 over Left Fk Troublesome Crk

Good

Knott County, Kentucky · .10 MI West JCT Ky 160 · Structure no. 060B00077N

Built
2003
22 years old
Condition
Good
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
48 ft
1 main span
Daily traffic
1,277
2020 count
Owner
State
State Highway Agency

About this bridge

KY-550 over Left Fk Troublesome Crk is a prestressed concrete box beam or girders - multiple carrying KY-550 over Left Fk Troublesome Crk in Knott County, Kentucky. It was built in 2003, so it is 22 years old, younger than the Kentucky average of 46.6 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 1,277 vehicles a day, roughly 7% of them trucks, projected to reach 1,277 by 2040. The structure is 48 ft (14.6 m) long and 52 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesKY-550
CrossesLeft Fk Troublesome Crk
Location.10 MI West JCT Ky 160
RouteState Highway 550
CountyKnott County
StateKentucky
Coordinates37.33556, -82.98111
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length48 ft (14.6 m)
Longest span46 ft (14 m)
Deck width52 ft (15.8 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,277 (2020)
Projected traffic1,277 by 2040
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

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 KY-550 over Left Fk Troublesome Crk built?

It was built in 2003, making it 22 years old in 2025.

What condition is KY-550 over Left Fk Troublesome Crk 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 June 2024.

How much traffic does KY-550 over Left Fk Troublesome Crk carry?

About 1,277 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is KY-550 over Left Fk Troublesome Crk?

The structure is 48 ft (14.6 m) long with a longest span of 46 ft (14 m) and a deck 52 ft wide.

Who owns KY-550 over Left Fk Troublesome Crk?

It is owned by the State Highway Agency.