US Bridges

KY-3520 over Black Branch

Fair

McCracken County, Kentucky · .30 MI West of JCT Ky 786 · Structure no. 073B00033N

Built
1932
93 years old
Condition
Fair
inspected December 2023
Type
Culvert
Concrete
Length
54 ft
3 main spans
Daily traffic
1,017
2021 count
Owner
State
State Highway Agency

About this bridge

KY-3520 over Black Branch is a concrete culvert carrying KY-3520 over Black Branch in McCracken 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 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 1,017 vehicles a day, projected to reach 1,017 by 2041. The structure is 54 ft (16.5 m) long. If it were closed, the detour would be 70.8 mi (114 km).

Location

Open in Google Maps
CarriesKY-3520
CrossesBlack Branch
Location.30 MI West of JCT Ky 786
RouteState Highway 3520
CountyMcCracken County
StateKentucky
Coordinates37.06611, -88.74722
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.8 US tons
Inventory rating29.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 20
Structure length54 ft (16.5 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,017 (2021)
Projected traffic1,017 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed70.8 mi (114 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-3520 over Black Branch built?

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

What condition is KY-3520 over Black Branch 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 December 2023.

How much traffic does KY-3520 over Black Branch carry?

About 1,017 vehicles per day (2021 count).

How long is KY-3520 over Black Branch?

The structure is 54 ft (16.5 m) long with a longest span of 12 ft (3.7 m).

Who owns KY-3520 over Black Branch?

It is owned by the State Highway Agency.