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

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

Wednesday, February 2, 2022 
8:30 am – 5:00 pm CST (incl. a 60-min break)


Presented by
Mahsa Hedayati

Types of Retaining Walls
Traditional cantilevered retaining walls
• Reinforced concrete walls
• Reinforced concrete masonry walls
Soldier pile and lagging walls
Traditional timber walls
Traditional gravity walls
Reinforced soil retaining walls
Anchored retaining walls (tie-backs, soil nailing, etc.)
Temporary retaining walls
Over-steepened reinforced slopes
Gabion walls
Crib walls
Private-sector vs. highway retaining wall systems
Cost of retaining walls in Texas

Retaining Wall Design
Soil design parameters
Lateral earth pressure
External stability
• Sliding
• Overturning
• Bearing capacity
• Settlement
• Scour
Internal stability
Global stability
Special considerations for tiered retaining walls
Service life
Design software

Slope Stabilization
Science of slope stability in Texas
Surficial vs. deep-seated slope stability
Long term vs. short term stability
Slope stabilization techniques
• Regrading
• Excavation and replacement
• Slope reinforcement/pinning
• Ground improvement
• Toe retaining walls

Retaining Wall and Slope Stabilization Case Histories
Commercial, residential projects
Highway and institutional projects
Case histories in Texas


 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


AIA:     (AIA credits only available for attending live Webinar)
7.0 LU|HSW

Landscape Architects:
7.0 HSW CE Hours

LA CES:     (LA CES credits only available for attending live Webinar or Seminar)
7.0 HSW PDHs

Floodplain Managers:

International Code Council:
.7 CEUs (Sitework)


Continuing Education Credit Information 

Texas Retaining Wall Design and Slope Stabilization Techniques
This webinar is open to the public and offers 7.0 PDHs to professional engineers and
7.0 HSW CEPHs to architects and landscape architects licensed in Texas. Educators and
courses are not subject to pre-approval in Texas.

Engineers and architects seeking continuing education credit in other states will be able
to claim the hours earned at this webinar, in most cases. Refer to specific state rules to
determine eligibility.

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

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

The International Code Council has approved this event for .7 CEUs in the specialty area
of Sitework (Preferred Provider No. 1232).

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

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).


Mahsa Hedayati Ph.D P.E.

Senior Geotechnical Engineer, Freese and Nichols, Inc.
Dr. Hedayati is a senior geotechnical engineer at Freese and Nichols, Inc and an adjunct faculty at the University of Texas at Arlington. Her experience with geotechnical engineering includes subsurface investigations, foundation analysis and design, slope stability and seepage analysis, numerical modeling, dam rehabilitation and redesign, levees, floodwalls and drainage structures design. As an adjunct faculty, she teaches courses on computational geotechnics and the geotechnical aspects of landfill design. Dr. Hedayati earned her B.Sc. degree in Civil Engineering from Amirkabir University of Technology (Tehran Polytechnic) and her M.Sc. degree from Tehran University, where she focused on polluted soils and decontamination methods. She earned her Ph.D. degree in Geotechnical Engineering from the University of Texas at Arlington.

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: Texas Retaining Wall Design and Slope Stabilization Techniques

Delivery Method: Live Online

Course Description: This course covers the types of retaining walls and their applications, retaining wall design based on soil parameters, loads and other site conditions, and slope stabilization strategies specific to soils and site conditions found in Texas.

Learning Objectives:

Learning Objective 1:
Learners will be able to differentiate the types of forces that act on retaining walls.

Learning Objective 2:
Learners will be able to describe methods to achieve slope stability, including regrading, slope reinforcement/pinning, ground improvement, retaining structures, and excavation and replacement.

Learning Objective 3:
Learners will be able to identify and explain the features and applications of various types of retaining walls, including cantilevered walls, soldier pile and lagging walls, timber walls, gravity walls, anchored walls, and others.

Learning Objective 4:
Learners will be able to describe the factors that must be considered when designing a retaining wall, including soil design parameters, lateral earth pressure, bearing capacity, settlement, groundwater, backfill and service life.

LUs: 7.0                                                                                             LU Type: LU|HSWs.

Prerequisites: Experience with site evaluations and earthwork

Advance Preparation: None

Program Level: Intermediate

Course Expiration Date: 11/15/2024

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 self-study effort, you should review the rules of your licensing/certifying entity. It’s your responsibility to determine whether or not this self-study 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