Webinar instructions will be emailed before the date of the webinar.

Please log into the webinar 15 – 30 minutes before start time.

Log into Webinar
8:00 – 8:30 am PST
Morning Session
8:30 am – 12:45 pm PST
12:45 – 1:45 pm PST
Afternoon Session
1:45 – 5:00 pm PST


Presented by:
Curran E. Mohney, RG CEG 

Slope Movement and Mechanisms
Type of slope movement and instability
• Rockfall and rockslides
• Translational and rotational failures
• Debris flows and rapidly moving landslides
Analyzing the stability of slopes
Slope stability concepts
• Reviewing geological conditions
Effects of regional geology
• Examining soils and topography
• Evaluating surface and groundwater
• Shoreline and streambank erosion
A brief discussion of soil and rock mechanics
• The influence of water
• Testing soil properties for design data
Evaluating types of slopes
• Natural slopes
• Engineered slopes
Methods of slope stability analysis

Slope Stabilization Methods
Use of vegetation (biostabilization)
Surface protection
Installing earth retention structures
Rock slope stabilization
Debris flow stabilization
Buttressing for streambank stabilization and environmental considerations
Combining methods
Refining and selecting methods

Landslide Hazard and Risk Assessment
Definitions and elements of landslide hazard risk
Risk-reduction strategies (objectives for landslide mitigation)
Lifecycle cost analysis

Case History in Landslide Mitigation
Slope stabilization using retaining walls
Slope stabilization using combination of methods
Rockfall mitigation
Slope stabilization using earthworks
Shear keys and buttresses
Slope stabilization using drainage



Webinar Instructions

Each webinar session earns continuing education credit and can be registered for individually. All attendees must log-on through their own email – attendees may not watch together if they wish to earn continuing education credit. HalfMoon Education Inc. must be able to prove attendance if either the attendee or HalfMoon Education Inc. is audited.

Certificates of completion can be downloaded in PDF form upon passing a short quiz. A link to the quiz will be sent to each qualifying attendee immediately after the webinar. The certificate can be downloaded from the Results page of the quiz upon scoring 80% or higher.

Webinars are presented via GoToWebinar, an easy-to-use application that can be run on most systems and tablets. Instructions and login information will be provided in an email sent close to the date of the webinar. It is highly recommended that you download, install and test the application before the webinar begins by clicking on the link in the email.

GoToWebinar App requirements:
Windows 7 – 10 or Mac OSX Mavericks (10.9) – macOS Catalina (10.15)

Web Browser:
The two most recent version of the following browsers:
Google Chrome, Mozilla Firefox, Apple Safari, Microsoft Edge
Internet Explorer v11 (or later) with Flash enabled

Internet connection:
 Minimum of 1Mbps       Hardware: 2GB RAM or more

For more information, visit the Support section at


Professional Engineers
7.0 PDHs
(Non-Mandatory in WA)

7.0 PDHs
(Non-Mandatory in WA)

Architects     (AIA credits only available for attending live Webinar)
7.0 HSW CE Hours

Landscape Architects     (LA CES credits only available for attending live Webinar)
7.0 HSW CE Hours

International Code Council

Floodplain Managers

7.0 SAF Cat 1 CFE Credits


Continuing Education Credit Information
This webinar is open to the public and offers a 7.0 PDH non-mandatory continuing education opportunity to Washington engineers and geologists, and 7.0 HSW PDHs to Washington architects and landscape architects. Courses and providers are not subject to preapproval in Washington.

This webinar offers 7.0 PDHs to Oregon engineers, registered geologists (RG) and certified engineering geologists (CEG), and 7.0 HSW continuing education hours to Oregon architects and landscape architects. Courses and providers are not subject to preapproval in Oregon.

Engineers, geologists, architects and landscape architects in other states will be able to apply the credits earned at this webinar, in most cases. Refer to specific state rules to determine course eligibility. HalfMoon Education is not seeking approval for landscape architects in New Jersey, or geologists in North Carolina, South Carolina or Delaware.

The American Institute of Architects Continuing Education System has approved this course for 7.0 LU|HSW (Sponsor No. J885). Only full participation is reportable to the AIA CES.

The Landscape Architecture Continuing Education System has approved this course for 7.0 HSW PDHs. Only full participation is reportable to the LA CES.

The International Code Council has approved HalfMoon Education as a Preferred Provider of continuing education (No. 1232). Course approval is pending in the specialty area of Sitework. Visit this course listing at for updates on pending credit.

This webinar has been approved by the Association of State Floodplain Managers for 7.0 CECs for floodplain managers.

The Society of American Foresters has approved this course for 7.0 Cat. 1 CFE credits.

Completion certificates will be awarded to participants who complete this event, respond to prompts, and earn a passing score (80%) on the quiz that follows the presentation (multiple attempts allowed).


Curran E. Mohney

Engineering Geologist
Mr. Mohney is the Engineering Geology Program leader for the Oregon Department of Transportation (ODOT). The Engineering Geology Program at ODOT encompasses site characterization, subsurface exploration, slopes and embankments, geologic hazards, groundwater, geotechnical instrumentation, and planning and research activities. In this role, he also oversees the Unstable Slopes (landslide/rockfall) Program for ODOT. He is a registered geologist and a certified engineering geologist in Oregon with over 25 years of experience in Oregon and the western states. Mr. Mohney has been the Engineering Geology Program leader since 2004. Prior to this, he had been a staff and project-level geologist for consulting firms and the mining industry as well as for ODOT. He is a graduate of the Geology Program at Portland State University. During his professional career, Mr. Mohney has been involved in the investigation, design, and mitigation of hundreds of landslides and rockfalls. 

AIA Info

AIA Provider Statement:

HalfMoon Education Inc. is a registered provider of AIA-approved continuing education under Provider Number J885. All registered AIA/CES Providers must comply with the AIA Standards for Continuing Education Programs. Any questions or concerns about this provider of learning program may be sent to AIA/CES ( or (800) AIA 3837, Option 3).

This learning program is registered with AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product.

AIA continuing education credit has been reviewed and approved by AIA/CES. Learners must complete the entire learning program to receive continuing education credit. AIA continuing education Learning Units earned upon completion of this course will be reported to AIA/CES for AIA members. Certificates of Completion for both AIA members and non-AIA members are available upon request.

Course Title: Slope Stabilization and Landslide Prevention in the Pacific Northwest

Delivery Method: Live Online

Course Description: This course examines the types and causes of slope movements and how slopes can be stabilized. It explores landslide hazards, risks, and mitigation strategies specific to conditions found in the Pacific Northwest.

Learning Objectives:

Learning Objective 1:
Learners will be able to identify types and causes of slope movement and instability.

Learning Objective 2:
Learners will be able to identify and describe conditions, soil and topography that tend to maintain slope stability, and they will be able discuss stability issues for natural slopes and engineered slopes.

Learning Objective 3:
Learners will be able to describe methods to sustain slope stability, including the use of vegetation, surface protection, unloading, buttressing, drainage, reinforcement, installation of earth retention structures, and combining methods.

Learning Objective 4:
Learners will be able to analyze landslide hazards and risks and describe risk-reduction/mitigation strategies.

LUs: 7.0                                                                                             LU Type: LU|HSWs.

Prerequisites: Familiarity with site development and earthwork

Advance Preparation: None

Program Level: Intermediate

Course Expiration Date: 12/13/2024

Complaint Resolution Policy:

Complaints regarding this course can be emailed to or by calling (715) 835-5900. A HalfMoon Education representative will respond within 72 hours to resolve the complaint, which will include, but not limited to, access to another CE activity at no or reduced cost or a full or partial refund. Each instance will be resolved on a case-by-case situation.

USB MP4/PDF Price: $299.00


Before undertaking any on-demand effort, you should review the rules of your licensing/certifying entity. It’s your responsibility to determine whether or not this on-demand course meets your continuing education requirements.

You must take and pass a quiz in order to receive credit. You can take the quiz as many times as needed and there is no time limit on the quiz. Once the quiz is completed, you will be asked to download your certificate.

Videos that qualify for AIA, LACES, ASLA, or CLARB credit will require an extra week for processing.

Streamable MP4/PDF

Available approximately 1 week after the date of the live event or the date of your order, whichever is later.

To track your purchase you will need to create an account on the website using the email address used for your registration.

The video will have occasional question prompts that will not allow the video to progress unless they are answered. You will not be able to skip forward while watching the video.

If you attempt to resume watching the video on a separate device, your progress will not be saved.

Click the link which appears at the end of the video to be taken to the course quiz.


HalfMoon will mail these materials via USPS. Please allow 2 weeks from the date of purchase to receive your product. If the live seminar is in the future, please allow 5 weeks from the date of the live seminar.

The link to the quiz will be available in a PDF in your USB drive marked QUIZ.

HalfMoon will contact you and issue a full refund if the product you ordered is not available. However, refunds will not be issued if completion certificates are requested.

Please contact HalfMoon Education if you have any questions during the process of taking this course. (715) 835-5900 or