US Bridges

KY-170 over Br of Mill Creek

Good

Mason County, Kentucky · .10 MI Sou. of JCT Ky 324 · Structure no. 081B00021N

Built
1948
77 years old
Condition
Good
inspected November 2023
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
350
2021 count
Owner
State
State Highway Agency

About this bridge

KY-170 over Br of Mill Creek is a concrete culvert carrying KY-170 over Br of Mill Creek in Mason 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 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 350 vehicles a day, projected to reach 350 by 2041. The structure is 25 ft (7.7 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesKY-170
CrossesBr of Mill Creek
Location.10 MI Sou. of JCT Ky 324
RouteState Highway 170
CountyMason County
StateKentucky
Coordinates38.49306, -83.78583
Functional classRural Minor 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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionNovember 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 alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating45 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 20
Structure length25 ft (7.7 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 traffic350 (2021)
Projected traffic350 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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-170 over Br of Mill Creek built?

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

What condition is KY-170 over Br of Mill Creek 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 November 2023.

How much traffic does KY-170 over Br of Mill Creek carry?

About 350 vehicles per day (2021 count).

How long is KY-170 over Br of Mill Creek?

The structure is 25 ft (7.7 m) long with a longest span of 12 ft (3.7 m).

Who owns KY-170 over Br of Mill Creek?

It is owned by the State Highway Agency.