1. Geohazard inventory Training • April 19, 2017
Welcome and intro

2. Geohazard inventory Training • April 19, 2017
Provide overview of ODOT’s manual of Rockfall and Landslide Inventories.
Provide overview of ODOT GeoMS – Geologic Hazard Management System (GHMS).
Terracon Training Session

3. Geohazard inventory Training • April 19, 2017
Terms:
Landslide: the down-slope gravitational movement of material that is comprised of at least 51 percent soil consisting of boulders, cobbles, gravel, sand, silt, and/or clay particles.
Soil Cut: any slope which has been modified by construction activities through the removal of soil materials. Typically, these slopes are present above the roadway.
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4. Geohazard inventory Training • April 19, 2017
Terms:
Full Height Embankment: roadway support constructed with engineered fills where both side slopes are greater than 5 feet in height not associated with a drainage structure. Embankments associated with drainage structures will not be included within this Manual, but should be assessed associated with the Culvert Inventory for spans less than 10 foot, or the Bridge Inventory for spans 10 feet or greater.
Side Hill Embankment: roadway support constructed with engineered fills where one side slope is greater than 5 feet in height, but the opposite side has a fill height less than 5 feet, or consists of at grade, cut slope, or natural slope.
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5. Geohazard inventory Training • April 19, 2017
Terms:
Rockfall: The down-slope gravitational movement of material that is comprised of at least 51 percent rock. Where, rock is defined as: Any material found along a slope that when freshly exposed has the characteristics of in-place bedrock. Bedrock includes, but not limited to, sandstone, siltstone, shale, limestone, dolomite, coal, claystone, and conglomerate.
Rock Slope: Any slope, either natural or man-made, that has in-place bedrock exposed at the surface.
Rockfall Event: A distinct period of time during which a single or multiple rock(s) and associated debris dislodges from a rock slope.
Terracon Training Session

6. Geohazard inventory Training • April 19, 2017
Terms:
Rockfall Inventory Site: any continuous roadway section where a rock slope has the same characteristics. A minimum slope height of 10-feet is required to be an Inventory Site, unless the Field Team determines that a slope with a height less than 10 feet poses a danger to safety of the traveling public.
Natural Backslope: any slope which has not been modified through construction activities. These slopes can be present above a soil cut or below fill slopes.
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7. Geohazard inventory Training • April 19, 2017
Inventory Site Determination:
All locations should be tied to the County Log Mile relative to the Straight Line Mileage
Ramps:
All locations should reference the County Log Mile to Mainline.
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8. Terracon Training Session

9. Terracon Training Session

10. Terracon Training Session

11. Geohazard inventory Training • April 19, 2017
Ramps:
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12. Footer (go to Insert Header & Footers to change)

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15. Geohazard inventory Training • April 19, 2017
Preliminary Rating:
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16. Geohazard inventory Training • April 19, 2017
Landslide Site Scoring
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17. Geohazard inventory Training • April 19, 2017
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18. Ramps:
Rockfall
Site Scoring

19. Geohazard inventory Training • April 19, 2017
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20. Geohazard inventory Training • April 19, 2017
Required Data Entry is a compounding process as the risk increases.
All sites have non-rated, or Tier 1, data collected.
The higher the risk, the more data is collected.
Terracon Training Session

21. Geohazard inventory Training • April 19, 2017
GHMS  Landslide:
Tabs for Data Entry on Desktop App (slightly different on web):
Screening
Location/GPS
Hazard Area
Roadway Info
Hydrology
Suggested Remediation
Slope
Info Sources
Landslide
Impact
Accident
Precipitation
Traffic
Memo
Interview
Inspection
Remediation
Maintenance
Terracon Training Session

22. Geohazard inventory Training • April 19, 2017
Site Screening:
Preliminary Rating: 2 part matrix
Prob. of Landslide Occurrence
Prob. of Landslide Reaching Traffic
Low Moderate High Very High
Data Fields Available for Population is based on the Site Screening Preliminary Rating
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23. Geohazard inventory Training • April 19, 2017
GHMS  Landslide:
Location & GPS (Data to generate NLFID):
2 Subtabs: Basic Information & GPS Information
Basic Information
District
County
Route System
Route Number
Jurisdiction
NLFID is Auto-generated (update toggle)
 NLFID: Network Linear Feature Identification Code
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24. Geohazard inventory Training • April 19, 2017
GHMS  Landslide:
Location & GPS (Data to generate NLFID):
2 Subtabs: GPS Information
GPS Information
 Only BMP Position Required. However, can insert Centroid and EMP locational data as well.
Terracon Training Session

25. Geohazard inventory Training • April 19, 2017
GHMS Optional Data  Landslide:
Roadway Width – Width from white line to white. – recorded in Roadway Information.
Lane Number/One Direction – Recorded in Roadway Information.
Roadway Construction – Recorded in Roadway Information.
Toe to Shoulder Dist. – Recorded in Hazard Area.
Slope Appearance and Vegetation – Hazard Area within Description.
Terracon Training Session

26. Geohazard inventory Training • April 19, 2017
GHMS  Rockfall:
Tabs for Data Entry (on desktop application):
Screening
Location/GPS
Hazard Area
Roadway Info
Hydrology
Maintenance
Slope
Info Sources
Bedding
Joint
Catchment Area
Documents
SDI Sampling
Accident
Traffic
Memo
Interview
Inspection
Precipitation
Remediation
Terracon Training Session

27. Geohazard inventory Training • April 19, 2017
Site Screening:
Preliminary Rating: 2 part matrix
Prob. of Rockfall Occurrence
Prob. of Rockfall Reaching Traffic Lane
Low Moderate High Very High
Data Fields Available for Population is based on the Site Screening Preliminary Rating
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28. Geohazard inventory Training • April 19, 2017
Location & GPS:
Similar to Landslide
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29. Geohazard inventory Training • April 19, 2017
Rockfall – Functional Barrier
Retention systems (e.g. D50, Rock Fence) are evaluated for effectiveness (functionality)
Key question – will the wall be effective for either very large block sizes or large debris volumes with small catchment storage capacity?
Further guidance on Rockfall Concrete Barrier can be found in ODOT Sponsored Research Report –
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30. Geohazard inventory Training • April 19, 2017
GHMS Details Specific to Terracon:
SR 823 will be classified as Principal Arterial
District will be “PPP” – County will be “SCO” to allow for separation from rest of ODOT Maintained
Sites should not be submitted to GHMS until road is at final grade (can be stored as local sites on application with updates made as warranted).
Discussion about submission of sites and documents (photos)
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31. Geohazard inventory Training • April 19, 2017
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32. Geohazard inventory Training • April 19, 2017
GHMS Demo
Desktop Application
Data Creation
Data Submittal
Data Retrieval/Local Sites
Web Application
Data Viewing
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33. Questions ?
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