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 Prefabricated Retaining Wall System (PRWS) Approval Process

To our Consultants, Contractors, and Wall Suppliers,
Please note that ODOT had instituted a new approval process for Prefabricated Retaining Wall Systems (PRWS) as of April 01, 2016.  Prefabricated Retaining Wall suppliers seeking approval of their PRWS for use on ODOT projects must submit applications in accordance with the requirements of the PRWS Approval Process. The approval status of any wall system on the ODOT Approved Product List (Approved List) will expire five years from the date of placement on the list or when there are changes in the wall system as described in the Prefabricated Retaining Wall Systems Approval Process. The approval status of any wall system approved prior to April 1, 2016 will expire on December 31, 2016.
The PRWS Approval Process documentation can be located on the ODOT Approved Products List (Approved List) located here:
A link to the PRWS Approval Process documentation is also available on the left-hand menu bar of the ODOT Office of Geotechnical Engineering (OGE) web site:
The following types of Prefabricated Retaining Wall Systems are subject to approval by this process:
·         Precast Gravity Wall Systems
·         Precast Semi-Gravity Wall Systems
·         Bin Wall Systems
·         Crib Wall Systems
·         Gravity Modular Block Retaining Wall Systems (also known as Segmental Retaining Walls (SRW), Modular Segmental Retaining Walls, and Modular Concrete Block Retaining Walls)
·         Gravity Large Block Retaining Wall Systems (also known as Big Block Retaining Walls)
·         Mechanically Stabilized Earth (MSE) Wall Systems
Please note that Modular Block and Large Block Retaining Wall Systems that incorporate soil reinforcements, such as geogrids, are considered MSE Walls, and must meet the requirements of Supplemental Specification (SS) 840, and the Submittal Requirements for Approval of Mechanically Stabilized Earth (MSE) Wall Systems as given in the PRWS Approval Process.  If a Modular Block or Large Block Retaining Wall System is to be used as either a gravity wall or an MSE wall, the supplier must make two submissions: one for the wall system to be used in each mode.

 Visual Classification for Geotechnical Logging of Soil and Rock Stratum

Course Description:
The Ohio Department of Transportation’s (ODOT) Visual Classification Course for Geotechnical Logging of Soil and Rock Stratum is being offered by the Office of Geotechnical Engineering on October 6, 2016. The focus of the course will be to provide a working knowledge of the current requirements for the classification of both soil and rock materials as related to geotechnical explorations for ODOT projects. Anticipated attendees for the course are individuals who will be involved in field or laboratory visual classification of samples, development of boring logs, or the QA/QC of the process as required by the ODOT Office of Consultant Services. The course is designed to be hands-on, involving both classroom and laboratory instruction and exercises. The course goal is to provide adequate instruction so that the Consulting community will be able to provide a standardized and uniform submission of boring logs and soil profiles.
Course Outline:
08:30 - 10:30: Soil Classification
10:30 - 10:45: Break
10:45 - 11:30: Soil Classification – Hands On
11:30 - 12:30: Lunch – On Own
12:30 - 14:30: Rock Classification
14:30 - 14:45: Break
14:45 - 16:00: Rock Classification – Hands On
16:00 - 16:15: Break
16:15 - 17:00: Practical Exam
For a course flyer and registration information, click HERE.
Course Instructors:
The course will taught by Mr. P. Paul Painter and Mr. Adam Willis, Geologists with the ODOT, Office of Geotechnical Engineering. Mr. Painter has been with ODOT since 2005 and Mr. Willis has been with ODOT since 2009. Prior to working for ODOT, both were employed as consultants working on a wide range of transportation, heavy infrastructure and site development projects. Mr. Painter is a Licensed or Registered Geologist in three states.

 Subsurface Investigation Qualification

National Highway Institute Course Offered
Subsurface Investigation Qualification
November 14 - November 16, 2016 
Holiday Inn Express & Suites
2806 Taylor Rd Ext, Reynoldsburg, Ohio 43068
Phone: (614) 861-8888
The course is being offered by the National Drilling Association (NDA). ODOT Consultant Prequalification Requirements and Procedures, issued June 2010 state that after July 1, 2011, in addition to experience requirements, two prequalification categories require certification of personnel by the NDA. The course being offered is part of the certification process. For the category of Geotechnical Field Exploration (2.18), the field drill crew supervisor shall be certified. Only drill crew supervisors that meet these requirements are eligible to supervise geotechnical field explorations in the field. For the category of Geotechnical Drilling Inspection Services (2.19), at least one drilling inspector shall be certified. Only drilling inspectors that meet these requirements are eligible to perform these duties in the field.
Detailed course and registration information can be found at:
On-line registration for the course can be made at:
Questions regarding the NHI Subsurface Investigation Qualification course may be addressed to the NDA office at 877-632-4748.

 2016 Consultant Geotechnical Workshop

On June 21, 2016, the ODOT Office of Geotechnical Engineering (OGE) held a Geotechnical Workshop for Consultants.  Information and topics presented and discussed were as follows:
    • Welcome, ODOT Geotechnical Staff and Organization
• DIGGS 2.0, Almost There
• Microstation and gINT
• Geotechnical Bulletin 1 and 3 Revisions, Rock Slope Design Manual Revisions, SGE Updates
• Geopier SRT Plate Piles, Case Study
• Construction Geotechnical Updates
• CPT and PMT Explorations, Project Applications
• Revised Boring Sealing/Backfilling Requirements
• MSE Wall Repair Standard Drawings, Retaining Wall Accreditation and Approved Products List
• TUS-36-12.05, Large Diameter Open-Ended Pipe Piles, Case Study
• General question/answer
Adobe Acrobat Viewer (pdf) versions of the PowerPoint presentations of topics presented and discussed are now available HERE.

 gINT Download Files


The ODOT gINT Library, Data Template, and Example Project files are available HERE.  gINT version 8.2.004 or greater is required to use these files.  For those who do not have gINT version 8.2.004, or do not wish to use the ODOT gINT Library and Template, we are also making available the Official ODOT Symbols and Tiles for use in gINT Reports.