US Bridges

KY-70 over Isaac Creek

Poor

Muhlenberg County, Kentucky · .05 MI W of W-Jct Ky 175 · Structure no. 089B00049N

Built
1948
77 years old
Condition
Poor
inspected September 2023
Type
Tee Beam
Concrete
Length
99 ft
3 main spans
Daily traffic
1,680
2021 count
Owner
State
State Highway Agency

About this bridge

KY-70 over Isaac Creek is a concrete tee beam carrying KY-70 over Isaac Creek in Muhlenberg County, Kentucky. It was built in 1948, so it is 77 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.

It carries about 1,680 vehicles a day, roughly 9% of them trucks, projected to reach 1,680 by 2041. The structure is 99 ft (30.2 m) long and 30 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

Location

Open in Google Maps
CarriesKY-70
CrossesIsaac Creek
Location.05 MI W of W-Jct Ky 175
RouteState Highway 70
CountyMuhlenberg County
StateKentucky
Coordinates37.30278, -87.32361
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating40.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length99 ft (30.2 m)
Longest span30 ft (9.1 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,680 (2021)
Projected traffic1,680 by 2041
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed4.3 mi (7 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$415,000
NavigationNo navigation control on waterway

Frequently asked questions

When was KY-70 over Isaac Creek built?

It was built in 1948, making it 77 years old in 2025.

What condition is KY-70 over Isaac 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 September 2023.

How much traffic does KY-70 over Isaac Creek carry?

About 1,680 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is KY-70 over Isaac Creek?

The structure is 99 ft (30.2 m) long with a longest span of 30 ft (9.1 m) and a deck 30 ft wide.

Who owns KY-70 over Isaac Creek?

It is owned by the State Highway Agency.