US Bridges

KY-645 over KY-40 & Coldwater Fork

Good

Martin County, Kentucky · JCT Ky 645 & Ky 40 · Structure no. 080B00045N

Built
2010
15 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
483 ft
5 main spans
Daily traffic
4,537
2021 count
Owner
State
State Highway Agency

About this bridge

KY-645 over KY-40 & Coldwater Fork is a prestressed concrete continuous stringer/multi-beam or girder carrying KY-645 over KY-40 & Coldwater Fork in Martin County, Kentucky. It was built in 2010, so it is 15 years old, younger 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 4,537 vehicles a day, roughly 3% of them trucks, projected to reach 4,537 by 2041. The structure is 483 ft (147.2 m) long and 84 ft wide.

Location

Open in Google Maps
CarriesKY-645
CrossesKY-40 & Coldwater Fork
LocationJCT Ky 645 & Ky 40
RouteState Highway 645
CountyMartin County
StateKentucky
Coordinates37.85667, -82.51944
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.3 US tons
Inventory rating46.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 25 or greater
Structure length483 ft (147.2 m)
Longest span113 ft (34.5 m)
Deck width84 ft (25.5 m)
Roadway width78 ft (23.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,537 (2021)
Projected traffic4,537 by 2041
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was KY-645 over KY-40 & Coldwater Fork built?

It was built in 2010, making it 15 years old in 2025.

What condition is KY-645 over KY-40 & Coldwater Fork 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 August 2024.

How much traffic does KY-645 over KY-40 & Coldwater Fork carry?

About 4,537 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is KY-645 over KY-40 & Coldwater Fork?

The structure is 483 ft (147.2 m) long with a longest span of 113 ft (34.5 m) and a deck 84 ft wide.

Who owns KY-645 over KY-40 & Coldwater Fork?

It is owned by the State Highway Agency.