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Announcements

 Subsurface Investigation Qualification

Notice: This course is not currently being offered due to COVID-19 gathering restrictions.  A virtual course is not currently available.  We plan to schedule a course as soon as restrictions are lifted.

National Highway Institute Course Offered:
132079, Subsurface Investigation Qualification
 
Time to be Announced
Location to be Announced
 
This three-day course is normally offered 1-2 times per year at various locations. Taught by NHI-approved instructors, this course is part of a series to develop a training and qualification/certification program for geotechnical inspectors and field personnel. This course is intended for drillers, drilling inspectors, engineers, geologists, and technicians involved in field data collection and quality assurance of subsurface investigations. The course follows FHWA guidelines and practices for subsurface investigations.
 

ODOT Consultant Prequalification Requirements and Procedures state that in addition to experience requirements, two prequalification categories require certification of personnel by successful completion of NHI Course 132079. For the category of Geotechnical Field Exploration (2.16), field drill crew supervisors 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 (2.17), 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 on the National Highway Institute Course Description page.  
 
On-line registration for the course can be made through the
National Highway Institute.
 
 

 2020 Bridge Design Manual Geotechnical Revisions

​The 2020 Bridge Design Manual (BDM) has been posted as of January 17, 2020. The revisions to the submissions and design specifications in the new Sections 200 and 300 have been a long, many years' work. Specific Geotechnical revisions can be found in Section 305, Foundations, Section 307, Retaining Walls, Section 600, Typical General Notes, and Section 700, Typical Detail Notes. Please review the new BDM in detail, as there are many changes beyond the new two-column format. You can see a summary of the Geotechnical changes in a powerpoint presentation delivered at the Engineering Division webcast on February 14, 2020. This document represents the entire outline of Sections 305 and 307, with important changes described in red text. The document can be accessed at this link.

 Prefabricated Retaining Wall System (PRWS) Approval Process

To our Consultants, Contractors, and Wall Suppliers,
 
Please note that ODOT instituted the current approval process for Prefabricated Retaining Wall Systems (PRWS) on 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 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 and Semigravity Retaining Wall Systems
 
·         Prefabricated Modular Retaining Wall Systems:
            - Bin Wall Systems
            - Crib Wall Systems
            - Modular Block Wall Systems
     (also known as Segmental Retaining Walls (SRW), Modular Segmental Retaining Walls, and Modular Concrete Block Retaining Walls)
·         Mechanically Stabilized Earth (MSE) Wall Systems
 
Please note that Modular Block 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. Modular Block Wall Systems used as gravity walls must meet the requirements of SS870 and the Submittal Requirements for Approval of Prefabricated Modular Retaining Wall Systems. If a Modular Block Wall System is to be used as either a gravity wall or an MSE wall, the supplier must make two submissions: one for each of the wall system types.

 gINT Download Files

The ODOT gINT Library, Data Template, and Example Project files are available HERE.  gINT version 10.00.00.69 or greater is required to use these files.  For those who do not have gINT version 10.00.00.69, 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.