US Bridges

Mary Grubbs HWY Nc over CSX Railroad

Fair

Boone County, Kentucky · Wbl .05 MI W of JCT US25- · Structure no. 008B00061L

Built
1979
46 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
198 ft
3 main spans
Daily traffic
5,942
2022 count
Owner
State
State Highway Agency

About this bridge

Mary Grubbs HWY Nc over CSX Railroad is a prestressed concrete continuous stringer/multi-beam or girder carrying Mary Grubbs HWY Nc over CSX Railroad in Boone County, Kentucky. It was built in 1979, so it is 46 years old, younger than the Kentucky average of 46.6 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 5,942 vehicles a day, roughly 16% of them trucks, projected to reach 5,942 by 2042. The structure is 198 ft (60.2 m) long and 40 ft wide.

Location

Open in Google Maps
CarriesMary Grubbs HWY Nc
CrossesCSX Railroad
LocationWbl .05 MI W of JCT US25-
RouteState Highway 14
CountyBoone County
StateKentucky
Coordinates38.85917, -84.61139
Functional classUrban Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating84 US tons
Inventory rating50.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length198 ft (60.2 m)
Longest span68 ft (20.7 m)
Deck width40 ft (12.1 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,942 (2022)
Projected traffic5,942 by 2042
Trucks16%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed—
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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$980,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mary Grubbs HWY Nc over CSX Railroad built?

It was built in 1979, making it 46 years old in 2025.

What condition is Mary Grubbs HWY Nc over CSX Railroad 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 2023.

How much traffic does Mary Grubbs HWY Nc over CSX Railroad carry?

About 5,942 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is Mary Grubbs HWY Nc over CSX Railroad?

The structure is 198 ft (60.2 m) long with a longest span of 68 ft (20.7 m) and a deck 40 ft wide.

Who owns Mary Grubbs HWY Nc over CSX Railroad?

It is owned by the State Highway Agency.