Sylva Rotary 9/18/2014 - Landslides in WNC
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Transcript of Sylva Rotary 9/18/2014 - Landslides in WNC
![Page 2: Sylva Rotary 9/18/2014 - Landslides in WNC](https://reader035.fdocuments.us/reader035/viewer/2022062513/55641f1cd8b42a6e298b4bde/html5/thumbnails/2.jpg)
Resources
Things to Look for
Landslide Information
OVERVIEW
![Page 3: Sylva Rotary 9/18/2014 - Landslides in WNC](https://reader035.fdocuments.us/reader035/viewer/2022062513/55641f1cd8b42a6e298b4bde/html5/thumbnails/3.jpg)
Resources
Things to Look for
Landslide Information
OVERVIEW
![Page 4: Sylva Rotary 9/18/2014 - Landslides in WNC](https://reader035.fdocuments.us/reader035/viewer/2022062513/55641f1cd8b42a6e298b4bde/html5/thumbnails/4.jpg)
NORTH CAROLINA LANDSLIDE INVENTORY
locations in ALC/NCGS database
Mapped Landslides = 3,512
Mapped Landslide Deposits = 3,311
• 48 people killed since 1916
• > 85 homes & other structures damaged or destroyed
• Millions of taxpayer and private dollars spent on repair and buyouts
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WAYEHUTTA CREEK CREEK WATERSHED
PHASE I - INVENTORY
• 37 - Number of landslides • 9 Natural slopes
• 28 Modified slopes
• 3 Active landslides
• 6 High potential for future movement
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WAYEHUTTA CREEK CREEK WATERSHED
PHASE I - INVENTORY
• 10 – Number of subsidence locations• 9 High potential for
future movement
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WAYEHUTTA CREEK CREEK WATERSHED
PHASE I - INVENTORY
• 116 – Number of landslide deposits (660 acres)
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TYPES OF LANDSLIDES IN WNC
• Debris Flows • Debris Slides• Weathered Rock Slides • Rock Slides
• Natural Slopes • Human Modified Slopes
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DEBRIS FLOW – NATURAL SLOPE
Photo from NCGS
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Photos from NCGS
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Photo courtesy of Jackson Co. Erosion Control
DEBRIS SLIDE – MODIFIED SLOPE
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DEBRIS SLIDE– MODIFIED SLOPE
Photo courtesy of Jackson Co. Erosion Control
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Resources
Things to Look for
Landslide Information
OVERVIEW
![Page 14: Sylva Rotary 9/18/2014 - Landslides in WNC](https://reader035.fdocuments.us/reader035/viewer/2022062513/55641f1cd8b42a6e298b4bde/html5/thumbnails/14.jpg)
EXISTINGSLOPE MOVEMENTS/SLOPE MOVEMENT DEPOSITS
Map from NCGS
Mapped Deposit
Recent slide area
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Toe
active mainscarp
activeinternalscarp
inactive scarp
approximateoutline of debrisslide
Map and photos from NCGS
active scarp
Photos from NCGS
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THINGS TO LOOK FOR:CRACKS IN THE GROUND
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THINGS TO LOOK FOR:STRUCTURAL DAMAGE
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THINGS TO LOOK FOR:ABUNDANCE OF CURVED OR LEANING TREES
Photo from NCGS
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Resources
Things to Look for
Landslide Information
OVERVIEW
![Page 20: Sylva Rotary 9/18/2014 - Landslides in WNC](https://reader035.fdocuments.us/reader035/viewer/2022062513/55641f1cd8b42a6e298b4bde/html5/thumbnails/20.jpg)
ONLINE RESOURCES
• Appalachian Landslide Consultants, PLLC website
• NC Geological Survey website
• National Environmental Modeling and Analysis Center (NEMAC) at UNC-Asheville,
• WNC vitality index – all mapped landslides
• OptIN Regional Planning Tool – Southwestern Commission Council of Government & Appalachian Regional Commission
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APPALACHIAN LANDSLIDE CONSULTANTS
• Real Estate Property evaluations
• Buyers – looking for land or home
• Sellers – showcase safer building sites
• Owners – wanting to ensure peace of mind
• Developers – Find appropriate development areas, best use of resources on the land
• Landslide Susceptibility mapping
• Resources on ALC website, Facebook
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HOW TO PROTECT YOURSELF?
• Be landslide aware
• Report area landslides
• Use the maps
• Call a professional
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Jennifer B. Bauer, L.G.
Principal Geologist/Co-owner
Stephen J. Fuemmeler, L.G.
Principal Geologist/Co-owner
Thank You!
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RESOURCES
• Appalachian Landslide Consultants, PLLC –
• Website - www.appalachianlandslide.com,
• Facebook - https://www.facebook.com/pages/Appalachian-Landslide-Consultants-PLLC/331675916961376
• NC Geological Survey website - http://www.geology.enr.state.nc.us/Landslide_Info/Landslides_main.htm
• National Environmental Modeling and Analysis Center (NEMAC) at UNC-Asheville
• WNC vitality index – http://www.wncvitalityindex.org/gis/
• OptIN Regional Planning Tool - http://optinswnc.nemac.org/gis/
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Slope MeasurementsDegrees PercentRatio
30º 1.75 H : 1 V 57%
22º 2.5 H : 1 V 40%
19º 2.9 H : 1 V 35%
39º 1.25 H : 1 V 80%
45º 1 H : 1 V 100%
34º 1.5 H : 1 V 67%
27º 2.0 H : 1 V 50%