US Bridges

KY-100 over Sulphur Fork Creek

PoorPosted for load

Simpson County, Kentucky · On Allen - Simpson Cl · Structure no. 107B00004N

Built
1930
95 years old, rebuilt 1999
Condition
Poor
inspected July 2023
Type
Tee Beam
Concrete
Length
130 ft
3 main spans
Daily traffic
2,537
2021 count
Owner
State
State Highway Agency

About this bridge

KY-100 over Sulphur Fork Creek is a concrete tee beam carrying KY-100 over Sulphur Fork Creek in Simpson County, Kentucky. It was built in 1930 and reconstructed in 1999, so it is 95 years old, older than the Kentucky average of 46.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 2,537 vehicles a day, roughly 17% of them trucks, projected to reach 2,537 by 2041. The structure is 130 ft (39.5 m) long and 25 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesKY-100
CrossesSulphur Fork Creek
LocationOn Allen - Simpson Cl
RouteState Highway 100
CountySimpson County
StateKentucky
Coordinates36.70306, -86.41333
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.2 US tons
Inventory rating28.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length130 ft (39.5 m)
Longest span40 ft (12.2 m)
Deck width25 ft (7.6 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,537 (2021)
Projected traffic2,537 by 2041
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$405,000
NavigationNo navigation control on waterway

Frequently asked questions

When was KY-100 over Sulphur Fork Creek built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1999.

What condition is KY-100 over Sulphur Fork Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2023.

How much traffic does KY-100 over Sulphur Fork Creek carry?

About 2,537 vehicles per day (2021 count), of which roughly 17% are trucks.

How long is KY-100 over Sulphur Fork Creek?

The structure is 130 ft (39.5 m) long with a longest span of 40 ft (12.2 m) and a deck 25 ft wide.

Who owns KY-100 over Sulphur Fork Creek?

It is owned by the State Highway Agency.