US Bridges

KY-121 over Grogan Branch

Good

Calloway County, Kentucky · .40 MI East of JCT Ky 893 · Structure no. 018B00021N

Built
1932
93 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
3,080
2022 count
Owner
State
State Highway Agency

About this bridge

KY-121 over Grogan Branch is a concrete culvert carrying KY-121 over Grogan Branch in Calloway County, Kentucky. It was built in 1932, so it is 93 years old, older 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 3,080 vehicles a day, roughly 14% of them trucks, projected to reach 3,080 by 2042. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 39.8 mi (64 km).

Location

Open in Google Maps
CarriesKY-121
CrossesGrogan Branch
Location.40 MI East of JCT Ky 893
RouteState Highway 121
CountyCalloway County
StateKentucky
Coordinates36.58, -88.23861
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60 US tons
Inventory rating44 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,080 (2022)
Projected traffic3,080 by 2042
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 KY-121 over Grogan Branch built?

It was built in 1932, making it 93 years old in 2025.

What condition is KY-121 over Grogan Branch 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 2023.

How much traffic does KY-121 over Grogan Branch carry?

About 3,080 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is KY-121 over Grogan Branch?

The structure is 26 ft (7.9 m) long with a longest span of 8 ft (2.4 m).

Who owns KY-121 over Grogan Branch?

It is owned by the State Highway Agency.