US Bridges

Ky 30 over US 421

Good

Jackson County, Kentucky · 1500 S of S JCT KY3630 · Structure no. 055B00049N

Built
2023
2 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
233 ft
2 main spans
Daily traffic
1,870
2023 count
Owner
State
State Highway Agency

About this bridge

Ky 30 over US 421 is a prestressed concrete continuous stringer/multi-beam or girder carrying Ky 30 over US 421 in Jackson County, Kentucky. It was built in 2023, so it is 2 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,870 vehicles a day, roughly 15% of them trucks, projected to reach 1,870 by 2043. The structure is 233 ft (71 m) long and 41 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesKy 30
CrossesUS 421
Location1500 S of S JCT KY3630
RouteState Highway 30
CountyJackson County
StateKentucky
Coordinates37.34278, -83.90028
Functional classRural Minor Arterial

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.2 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadGreater than HL 93
Structure length233 ft (71 m)
Longest span115 ft (35.1 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,870 (2023)
Projected traffic1,870 by 2043
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.9 mi (3 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 30 over US 421 built?

It was built in 2023, making it 2 years old in 2025.

What condition is Ky 30 over US 421 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 April 2024.

How much traffic does Ky 30 over US 421 carry?

About 1,870 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is Ky 30 over US 421?

The structure is 233 ft (71 m) long with a longest span of 115 ft (35.1 m) and a deck 41 ft wide.

Who owns Ky 30 over US 421?

It is owned by the State Highway Agency.