Landslide in Campbell Co., northern Kentucky. Failing colluvial slope on the Kope Formation behind homes. Note shed that has fallen from the driveway down the slope. Photo by Mike Lynch.
Old landslide scar up on hill in Rowan Co., eastern Kentucky. Steep slope composed of fractured New Albany Shale sitting on top of clay-rich Crab Orchard Formation failed forming large blocks and masses of slumped black shale. Photo by Matt Crawford.
Large landslide in Perry Co., eastern Kentucky, 2006. Note thick colluvium at the main scarp of the slide. Photo by Matt Crawford.
Rockfall in Madison Co., central Kentucky. Millions of dollars are spent every year repairing and cleaning up after rockfall and landslide hazards.
Photo by Bart Davidson.
Slump in Daviess Co., western Kentucky. Note head scarp of rotated slump, slide occured in loess. Photo by Matt Crawford.
Landslide in Kenton Co., northern Kentucky. Landslide in thick colluvium on steep slope underlain by the Kope Formation. Photo by Matt Crawford.
Slumping landslide along Rt 1812 in Breathitt Co. Slumps like this are typical of eastern Kentucky where steep slopes, thick colluvial soils, and loading or undercutting of the slope by road construction creates slope instability.
Fluctuations in groundwater levels and stream bank erosion can cause landslides like this one near Independence, KY. Note the homes just above the top of the slide. Homeowners should be aware of pre-existing conditions around them that may cause slope instability. Photo by Matt Crawford.
Multiple generations of mitigation for a recurring landslide along KY 1829 in Kenton County. H-pile walls (recycled railroad) are a common correction effort to stabilize slopes in Kentucky. Photo by Matt Crawford.
Large rockfall along KY 519 in Rowan Co. Fractures in the bedrock decrease the strength and heavy precititation or freeze-thaw can trigger a fall. Note a pre-existing gabion wall there to stabilize the slope was damaged by the fall. Rockfall hazards can damage roadways, infrastructure, and even threaten life. Photo by Matt Crawford.
Damaging landslide in Powell Co. after heavy rainfall. 3.70 inches of rain fell between 1 and 3 hours in the area. Intense, rapid rainfall weakens the resisting forces on a slope, decreases strength, causing failure. Steep slopes, shaley bedrock, and thick clayey soils combined with slope modification (slope cuts, added weight, vegetation removal, or heavy precipitation) will increase slope instability. Photo by Dan Carey.
Heavy rainfall triggered this mudslide that damaged a condominium in Campbell Co in 2011. Evidence of an older pre-existing landslide was found on the slope above the condos. Pre-existing landslides are highly susceptible to future movement. Photo by Mike Lynch.
Large roto-translational slide that damaged a home in Boyd County. This area is naturally susceptible to landslides because of steep slopes and weak bedrock (mainly shales). These areas that are modified by house seat excavation, road construction, vegetation removal, and fill placement are conducive to landslides. Photo by Matt Crawford.
Aerial photograph of large landslide on a steep slope in Breathitt Co., Ky. The slide (circled in red) occurs above the road and is located at a sharp cutbank within a meander of a stream. Geologic formation contacts are outlined in yellow.
Formations present include: Ph-Hyden Formation, Ppk-Pikeville Formation, and Qal-Alluvium. The slide occurs in the Pikeville Formation above the road with the stream below the road. Slides like this are typical of eastern Kentucky where there steep slopes, thick colluvial soils, and undercutting of the slope by road construction or streams create
slope instability. The stream is flowing W-NW in this photo.