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Updates

Below is a log of revisions made to the Specifications for Geotechnical Explorations. Updates to Geotechnical Bulletins are also included within this page.

The information on this page does not reflect the current version of the manual. For accurate information, please visit the online Specifications for Geotechnical Explorations.

July 15, 2022

  • All references to Soil Profile updated to Geotechnical Profile
  • 303.7 – added language on complete classification of samples within scour zone
  • 401.6 – removed reference to OGPUPS
  • 406.7 – added language on the FHWA/DFI tool for selecting appropriate geophysical methods
  • 602.1 – added clarification on distinction between non-plastic and plastic A-8 with regards to compactness/consistency descriptor
  • 602.5 – added clarification that “AND” descriptor is for >35%
  • 607 – updated laboratory unit price list
  • 702.3.6 – added new scour reporting requirements
  • 706.8.2 – added language on including gradation curves related to scour in the geotechnical report
  • Appendix C – Added Point Load test report and updated Slake Durability Index test report example
  • Appendix D – Added OpenRoads example for Geotechnical Profile – Roadway sheets and Removed former Combined Roadway & Structure Soil Profile example
  • Appendix E – Consultant Proposal & Invoice Forms were revised on July 1, 2022 to reflect revised laboratory unit price list, current mileage reimbursement rate, and current Statewide Percentage for Net Fee

Jan. 21, 2022

  • 603.2 – acknowledges that ASTM D422 had been withdrawn from ASTM Standards but should continue to be used until replacement procedure is identified.
  • 607 – acknowledges that Particle Size Analysis--Sieve Only does not include a Wash Sieve.
  • 701, 702.X, and 703.3 –updates include removal of already defunct paper copy submission language and various other language clarifications
  • 705 (NEW SECTION) – Establishes Geotechnical Design Memorandum
  • 706 – Former Section 705; Various updates related to Establishment of Geotechnical Design Memorandum in new Section 705
  • Appendix C – Updated format of Compressive Strength of Rock test report and Added Slake Durability Index test report
  • Appendix E – Consultant Proposal & Invoice Forms were revised on November 9, 2021 to reflect current mileage reimbursement rate

July 16, 2021

SGE

  • 702.6.2 – changes to language intended to emphasize the value of cross sections and increase their usage in the soil profile.
  • 703.3.2 – clarification on how to report a boring is drilled through the bridge deck
  • Consultant Proposal-Invoice Spreadsheet – updated to reflect revised average overhead rate for fixed fee calculation (158.08%)

Geotechnical Bulletin 1

  • GB1 Figure B – updated criteria for 12” vs. 14” Chemical Stabilization (breakpoint now N60 = 11 instead of 10.5)
  • Section H.5 - Added language acknowledging that when the improved subgrade resilient modulus “credit” due to global chemical stabilization is being used on a project, areas that were undercut for rock, shale, or coal and replaced with Item 204 Embankment also then need to be chemically stabilized afterwards. 

Geotechnical Bulletin 2

  • Introduction (page 2) - Added language to remind designer that special benching can be transitioned to logical initiation and termination points within a long corridor rather than showing special benching for the entire corridor.
  • Section A - Simplified the guidance that Section A is only applicable for proposed embankments that have yet to be constructed

Jan. 15, 2021

SGE

  • Entire document – removed all metric references except where still required per AASHTO or ASTM
  • Section 303.2 – added language discussing that standalone pavement cores should not be numbered as part of the geotechnical exploration identification numbering sequence
  • Section 303.7.3 – adjusted retaining wall boring depth requirements and combined 303.7.3b and 303.7.3c due to subsequent identical requirements.
  • Appendices – Updated Geohazard Exploration Sheets in Sample Plans section to remove rock testing reports (results should instead be presented in tabular format on Cover Sheet) and renamed sheets to Soil Profile – Landslide.

Geotechnical Bulletin 1

  • Section F – added language acknowledging the inclusion of geocells in the Item Master list for C&MS 204 as well as the potential usage of geosynthetics whose properties exceed current minimum ODOT C&MS requirements in severe conditions (for example above a peat layer or where the utilities are so shallow that a 12-inch excavation isn’t possible)

July 17, 2020

  • Section 405.5 – restricted rock core box size to hold no more than 10 feet of core and be no more than 2.5 feet in length. This was done primarily to ensure that quality core photos can be taken.
  • Section 607 – revised Laboratory Test Unit Prices (for inflation)
  • Section 701 – added direction on providing color soil profile sheets when reporting rock core photos (pdf format).
  • Section 702.6.5 – added section discussing the new requirement to include rock core photographs in the soil profile
  • Appendix C – added ODOT Rock Core Photograph Report
  • Appendix E (Geotechnical Consultant Proposal/Invoice Spreadsheet) – Updated Average Overhead Rate for Calculation of Fixed Fee to 157.26% and revised Laboratory Test Unit Prices (for inflation)

Jan. 17, 2020

  • Sections 701-704 - the geotechnical exploration plan sheets have been renamed to Soil Profile – Roadway sheets, Soil Profile – Structure sheets, and Soil Profile – Geohazard sheets.
  • Section 702.3.1h – the Available Information plan note has been revised. This note applies for all soil profiles as of January 17, 2020. ODOT’s example soil profile sheets will be updated beginning in July 2020 as the Department transitions to OpenRoads.
  • Section 703.4 – Undisturbed test results for Soil Profile – Structure sheets will now be presented in the same location as for Soil Profile – Roadway sheets (prior to the presentation of the surface and subsurface data).
  • Appendix D - Revised soil profile sheet titles. These titles apply for all soil profiles as of January 17, 2020. ODOT’s example soil profile sheets will be updated beginning in July 2020 as the Department transitions to OpenRoads.

July 17, 2019

Geotechnical Proposal/Invoice Form 

  • Updated to reflect the new Weighted Average Overhead Rate for Calculation of Fixed Fee (156.68%)

SGE Manual

  • All references to “ground water” have been changed to “groundwater” to reflect current FHWA language in GEC-5. (We note that C&MS uses both terms depending on the spec item.)
  • Section 302.2.1 – updated available literature resources for office reconnaissance
  • Section 302.3.10 – added clarification
  • Section 302.3.11 – modified list of common land usage terms
  • Section 303.2 – acknowledges the use of “X-” in identification numbers for pavement cores
  • Section 303.7.2 – added clarification that any culverts with a span larger than 20 feet should be explored per bridge requirements in Section 303.7.1
  • Section 303.7.5 – added clarification that existing exploration requirements for High Mast Lighting Towers also apply for CCTV Towers
  • Section 401 – updated GEC-5 reference
  • Section 401.3 – simplified staking requirements to reflect current state of practice
  • Section 402.1.2 – simplified definition of a mechanical auger
  • Section 402.2 – expanded definition of portable drilling equipment
  • Section 403.3 – prohibited use of core barrel sizes smaller than N series for rock coring
  • Section 404.2 – added requirement to send hammer system calibration records to OGE (Paul Painter)
  • Section 404.3 – added language regarding hammer energy ratio maximum value of 90% when calculating N60 – this was already part of ODOT gINT library for past year but was not in SGE text
  • Section 405.5 – added clarification to rock core sample handling
  • Section 406.1 – simplified test pit language
  • Section 406.3 – removed language discussing potential depth that can be achieved in DCP test
  • Section 407.2.3 – corrected typographical error in title
  • Section 501.1 – modified language on monitoring wells
  • Section 501.2 – simplified definition of open standpipe piezometer
  • Section 601 – updated GEC-5 reference
  • Section 602 – updated visual soil descriptions to reflect current format
  • Section 603.6 – clarified that LOI tests are not required for fibrous or woody peat
  • Section 605.1 – added term “Unit” to RQD and Recovery in example descriptions
  • Section 605.2 – clarified format for interbedded rock description
  • Section 701 – added requirement that boring data be submitted in a format that is DIGGS compatible. gINT files that are capable of being converted to DIGGS format are acceptable.
  • Section 702.5.3 – added clarification that targets for pavement cores should not be included on a soil profile
  • Section 702.6 – added requirement that a graphical log for every project boring be shown in profile or cross section

Jan. 18, 2019

  • 105 – Increases language describing review of plan by geotechnical engineer of record
  • 403.1 – restricts 24-inch SPT
  • 405.5 – removes requirement of wooden dividers in core box and emphasizes positioning samples securely in box when encountering loss or voids
  • 406.7 – updates link to geophysics reference
  • 605.1 and 605.2 – updates 5 locations to say “core recovery” (rather than loss)
  • 702.3.7 – removes subgrade sample asterisk from Summary of Soil Test Data
  • 702.6.3 & 703.3.2 – removes the term “static water level” and replaces with end of drilling water level and water level measured at a time period after drilling operations
  • 703.3.2 – clarifies how to display elevations on a boring log when drilling through a bridge deck
  • Consultant Proposal/Invoice Form – adding line items for Stage 2 and Filed plan reviews by geotechnical engineer of record – plan review was already a requirement of SGE 105
  • In the SGE appendices, added a letter template for use by the geotechnical engineer of record to certify that they reviewed the plans
  • In the SGE appendices, several of the sample Soil Profile sheets have been updated to reflect proposed changes in the SGE

July 20, 2018

  • Section 302.2.1 – updated link for obtaining historical geotechnical records 
  • Section 404.2 – adds requirement to send copy of calibration records for hammer system to Office of Geotechnical Engineering 
  • Section 404.3 – establishes 90% as maximum for drill rod energy ratio for use in calculating N60 values 
  • Appendix E – Overhead Rate for Calculation of Net Fee increased to 155.27% 
  • Appendix G – Updated ODOT Supplement 1122 Determining Sulfate Content in Soils report form

July 21, 2017

  • Section 303.7.2 – added language clarifying when scour sampling and testing should be performed
  • Section 602 – updated language on sulfate content test method to reflect Supplement 1122
  • Section 605.1 – updated language on bedrock description requirements
  • Section 607 and Consultant Proposal/Invoice Spreadsheet – Unit prices for laboratory tests updated
  • Section 702.6.3f – updated language on bedrock description requirements
  • Section 703.3.2 – updated language on bedrock description requirements
  • Appendix A.1 – grammatical correction

July 15, 2016

Summary of Changes to ODOT Specifications for Geotechnical Explorations (July 2016 Version)

  • Section 407 - Sealing or Backfilling of Borings
    • The section was expanded significantly to replace the text in Appendix F, Policy for Sealing of Geotechnical Exploratory Boreholes. The existing policy had been a holdover from the 1996 Specifications for Subsurface Investigations.
  • Section 500 – Replaced five references to Section 506 (section deleted in January 2015) with Section 504
  • Section 702.2 – Provided clarification for soil profile scale requirements
  • Appendix F – Eliminated the text for the existing policy. 4 supplemental tables were added.

Geotechnical Bulletin 1

  • Section F – updated maximum depth to 18 inches for placing the geogrid at the bottom of the excavation. This brings the document into agreement with Supplemental Specification 861.

MicroStation Text to Node MDL Application

  • The MDL application can be used to combine multiple individual lines of text into a text node in MicroStation. This could be used to combine the individual lines of text of rock descriptions when included on boring graphics. As a text node you can select the text and use the “handles” to resize (word wrap) the length of the text node.

June 1, 2016

Appendices

  • The consultant proposal/invoice spreadsheet was updated with the following changes:
    • Discontinuation of separate average overhead rate for geotechnical services effective 6/1/16. The revised rate of 151.58% will apply to proposals for agreements and modifications received in Consultant Services on or after June 1, 2016, and similarly for task order proposals (for existing agreements) received in District or other offices.
    • Miscellaneous updates (cell reference correction – invoice date and print margins)

Jan. 15, 2016

  • 303.2 – updated survey requirements for explorations
  • 603.7 – updated to reflect Supplement 1122
  • Appendices:
    • New sulfate data reporting spreadsheet (previously the only copy was in Word format as part of Supplement 1122)
    • The consultant proposal/invoice spreadsheet was updated for Supplement 1122
    • Updated Sample Geotechnical Sheets

July 17, 2015

  1. Section 700
    • Section 702.3.7 – Added N60 values to summary of soil test data
  2. Appendices
    • Appendix D – Revised soil profile example
    • Appendix E – Updated ODOT Statewide Average for Net Fees

Jan. 16, 2015

  1. Section 500
    • Section 503 Open Standpipe Piezometers was deleted with some details moving to Section 502
    • Section 505 Time Domain Reflectometry (TDR) Cable was deleted with additional guidance placed in Section 501.4
  2. Section 600
    • Section 603.1 – revised Figure 600-1 to agree with existing language regarding the break point of the A-8 classification with regards to LLo/LL x 100
    • Section 605.2 – minor editorial
    • Section 607 – Table 600-19 (Pay Items for Laboratory Testing) was updated
  3. Appendices
    • Appendix A.1 – revised to reflect changes made to Figure 600-1
    • Appendix E – Geotechnical Exploration Proposal and Invoice Forms
      • Updates to the lab testing unit rates
      • Calculation and display of % cost distribution between tasks
      • Removal of the Red Flag Summary Task
      • Calculation and display of the total cost per foot of drilling

Oct. 9, 2014

The revision made on this date is as follows:

  1. The cost proposal/invoice spreadsheet was updated to reflect the latest average overhead rate for calculation of new fee, equal to 167.44%

July 21, 2014

  1. Section 100
    • Section 102 & 103 - updated to reflect new ODOT Plan Development Process
    • Section 105 - updated requirements regarding required reviews by registered engineer responsible for the geotechnical exploration report
  2. Section 200 – section retired due to new ODOT Plan Development Process. Portions were moved into Section 302.2
  3. Section 300
    • Section 302.2 – updated to include portions of former Section 200
    • Section 303.2 – provided further clarification on exploration identification number 
    • Section 303.5.6 – added section on exploration of rockfall
    • Section 303.7.2 – clarified criteria for drilling borings
  4. Section 400
    • Section 401.6 – added links for utility protection services
    • Section 401.14 – updated link to Ohio Manual of Uniform Traffic Control Devices
  5. Section 500 – no changes
  6. Section 600
    • Section 603.3.4 – updated AASHTO/ASTM test designation
    • Section 603.7 – added section on sulfate testing including modification to TEX-145-E method
    • Section 605.9 (and related sub-sections) – updated discontinuity description requirements
    • Section 605.11 – removed Core Loss from specification (605.11 becomes Core Recovery)
  7. Section 700
    • Section 701 – updated requirements for submissions
    • Section 702.2 – updated list of acceptable horizontal scales for soil profiles
    • Section 702.3.1 – added details on presentation of general information on cover sheet
    • Section 702.3.5 – new section for requirement of listing all bridges included in soil profile
    • Section 702.3.6 – new section to provide additional direction on presentation of scour data
    • Section 702.3.7 – added columns to Summary of Soil Test Data (hand penetrometer and sulfate content test results)
    • Section 702.5.3 – added direction on presentation of boring targets and graphical logs on separate sheets
    • Section 702.6 (and related sub-sections) – added direction on items that were previously only shown in the sample plans in Appendix D
    • Section 703.3 (and related sub-sections) – added new required details to be included on boring logs
    • Section 705.8.2 – added requirements for boring log presentation
  8. Appendices
    • Appendix A.1 – modified peat description
    • Appendix A.2 - modified to reflect GSI description requirements (only to be used for the scenarios specified in Section 605.9)
    • Appendix C – updated laboratory forms
    • Appendix D – eliminated severely weathered hatch from Soil and Rock Symbology Chart
    • Appendix D – revised sample plan sheets

Aug. 7, 2013

The revision made on this date is as follows:

  1. The cost proposal/invoice spreadsheet was updated to reflect the latest average overhead rate for calculation of net fee, equal to 171.84%

July 19, 2013

The revisions made this quarter are as follows:

  1. Included in Section 303.2, the requirement to report geographic coordinates to nine decimal degrees is reduced to six. The language included is presented as follows:
    • Identify the coordinates and station and offset of all explorations (borings, probes, test pits, etc.). Determine and report elevation in U.S. survey feet to one decimal place using NAVD 88. Determine and report horizontal position in geographic coordinates (Latitude and Longitude) using NAD 83 and shown as decimal degree to six decimal places.
  2. Included in Section 701, the requirement of providing a paper copy and an electronic copy of all geotechnical submissions to the District Geotechnical Engineer has been expanded to reflect the new ODOT Geotechnical Data Management System (GeoMS). Final geotechnical submissions are required to also be submitted to the GeoMS. The language included is presented as follows:

Jan. 20, 2012

The revision made this quarter is as follows:

  • Appendix D: Structure Foundation Exploration Sample Plans Cover Sheet has been revised to present consistent bedrock symbology.

July 15, 2011

The revisions made this quarter are as follows:

  1. Included in Section 602, the requirement to visually inspect samples for the presence of gypsum and test for sulfate accordingly. The language included is presented as follows:
    • Visually inspect each soil sample representing proposed pavement subgrade for the presence of gypsum (CaSO4·2H2O). Gypsum crystals are soft (easily scratched by a knife; they will not scratch a copper penny), translucent (milky) to transparent, and do not have perfect cleavage (do not split into thin sheets). Photos of gypsum crystals are shown in Supplement 1120. If gypsum is present, test the sample for sulfate content using test method TEX-145-E, Sulfate content in soils – colorimetric method, as published by the Texas Department of Transportation.

Other guidance regarding testing to determine the presence of sulfates in subgrade soils is presented in GB1 and Supplement 1120.

  1. The cost proposal/invoice spreadsheet was updated to reflect the latest average overhead rate for calculation of net fee, equal to 164.16%. A line item for sulfate testing of soils in accordance with TEX-145-E was included in the proposal and invoice lab sheets

Jan. 21, 2011

The revisions made this quarter are as follows:

  1. Section 100, acknowledged new prequalification for field exploration services and drilling inspection services.
  2. Section 303.2, presented the requirements for determining an exploration location's elevation and coordinates as "Determine and report elevation in U.S. survey feet to one decimal place using NAVD 88. Determine and report horizontal position in geographic coordinates (Latitude and Longitude) using NAD 83 and shown as decimal degree to nine decimal places." Reference to this is made throughout the document where ever coordinates are required.
  3. Section 605.8: Added Vitreous and Coal Stringer to the list of descriptors.
  4. Section 701: Removed the requirement to submit all documents in native format to the ftp site. Changed this requirement to the following: "Submit electronic copies of all final Geotechnical Exploration plan sheets as TIFF images in accordance with Location & Design Manual Volume 3, Section 1201, and the TIFF Submission Procedure. A copy of the TIFF Submission Procedure and associated document may be found at http://www.dot.state.oh.us/Divisions/ContractAdmin/Contracts/Pages/TIFF.aspx." In addition to this, the consultant is required to submit a paper and electronic copy of all final reports to the DGE.
  5. Section 705: Added the following requirement, "Identify the project PID and contact person (with contact information)."
  6. Appendix: Removed field log form (Appendix B) and outdated boring log form (Appendix D)

April 16, 2010

The revisions made this quarter are as follows (underlined italics text is the wording changed or added in the section):

  • Section 401.14: Included a link to Ohio Manual of Uniform Traffic Control Devices
  • Section 410: Reiterated that unit cost for Boring, Sampling and Field Testing includes backfilling
  • Section 607: Increased unit cost of testing based on inflation rates of 3.8% for 2008 and 0.1% for 2009; revised the unit rate table in Section 607 and the Proposal/Invoice Form
  • Section 702: Present roadway and subgrade explorations as plan drawings in the form of a Soil Profile. If the project includes structures, present all structure explorations in the Soil Profile as well. Do not create separate Structure Foundation Exploration plan sheets.
  • Section 702.3.1: Include the bridge number (i.e., FRA-71-0025) of each bridge included in the plan set, if any.
  • Section 702.3.5: Show a summary of test data for all roadway and subgrade boring samples on the cover sheet if all the test data fits on the front sheet, otherwise, present on additional sheets. If sampling and testing for a scour analysis was performed, present this data, using metric units for the diameter, on the cover sheet in tabular form if space permits, otherwise present this data on a new sheet after the boring log sheets.
  • Section 702.6.3.e: Complete geologic description of each bedrock unit, including unit core loss, unit RQD, SDI, and compressive strength test results. Use headings or footings for clarity as necessary. If there is not sufficient room to present these descriptions on the same sheet, present them on a subsequent(s) sheet(s). Do not present a complete geologic description of each bedrock unit for structure borings for which this information is presented on the boring log as described in 703.3.
  • Section 702.6.4 Boring Logs: Show the boring logs of all structure borings and any roadway borings drilled in the vicinity of the structure on the boring log sheet(s) following the plan and profile sheet(s). Create the boring logs in accordance with Section 703.3.
  • Section 703: Structure Foundation Exploration. Present the geotechnical exploration for explorations involving structures only (i.e., no roadway), including bridges, culverts, retaining walls, and noise walls, as plan drawings in the form of a Structure Foundation Exploration. Structures explored as part of the same construction project may be presented together under the same cover sheet.
  • Section 801: Identify whether the exploration program is for a local let or ODOT let project.

Oct. 16, 2009

  • Section 403.1: If, during an SPT sample, the sampler is advanced (sinks) under the weight of the rod or rod and hammer, note the length of travel. If it sinks for a full 6-inch increment, record 0 blows for that increment.
  • Section 702.6.3: Present blow count data on the left side of the graphical boring log if space allows; present moisture content data on right side of graphical boring log if space allows.
  • Section 703.3: Create the boring logs in the same format as those presented in the sample Structure Foundation Exploration in Appendix D. Boring logs may be created using the boring log report forms in the Office of Geotechnical Engineering gINT library (oh dot.glb), found at http://www.dot.state.oh.us/Divisions/ProdMgt/Geotechnical/Pages/gINTFiles.aspx.
  • Sections 703.3.1 and 703.3.2: Revised to match the boring log format.
  • Appendix D: Sample Plans have been revised to present consistent boring logs, using the boring log report forms in the gINT library.
  • Appendix E: The Geotechnical Exploration Proposal and Invoice forms have been revised to reflect the current statewide overhead rate to calculate net fee and the current mileage rate.

Jan. 16, 2009

  • Added Sample Plan Sheets for Geohazard Exploration to Appendix D.
  • Corrected typographical error on Soil Profile, Sample Plan Sheets, Cover Sheet.
  • Committed changes to MicroStation files for Soil Profile Sample Plan Sheets to Design History

Oct. 24, 2008

  • Corrected the changed web links/addresses throughout document.
  • Corrected the changed Section references throughout the document.
  • Added tables summarizing boring types to Appendix B.
  • Corrected grammatical errors.
  • Changed the ODOT Statewide Overhead Percentage for Net Fee to 172.03% in the Proposal/Invoice form

July 18, 2008

Revisions are specific to Sections 300 and 500, as follows:

  • Section 300 was revised to clarify drilled boring location, spacing, depth, and sample interval requirements. Borings were given boring type identifications (Type A, B, C, etc.), and the description was changed to a location, spacing, depth, and sample interval sequence as best as possible. Tables presenting this information have been created and will be included as an appendix in the near future. No specifications were changed. Also, a couple of section references were incorrect, therefore, they were corrected.
  • Chapter 500 was revised to clarify what an open standpipe piezometer is versus a monitoring well. They were basically switched.
  • One last grammatical change, "borehole" was changed to "boring" throughout the document.

Feb. 19, 2008

  • Revised Sample Plan Sheets in Appendix D

Jan. 18, 2008

  1. Overall – made a few grammatical and formatting changes throughout for clarity.
  2. Section 100
    • 103 – added paragraph referencing geotechnical bulletins and other office manuals.
  3. Section 300
    • 301 – added General section in its entirety. The purpose of this section is to outline the planning and execution of a Geotechnical program, as detailed in FHWA-IF-02-034, page 5
    • added figure from FHWA-IF-02-034, page 5 for reference.
    • Reformatted entire Section 300 due to added Section 301 and added figure 300-1.
    • 303.1 – added requirement for submission of boring plan to DGE for review and approval prior to starting exploration program. Listed the requirements for submission.
    • 303.4.1 – changed the minimum drilling depth requirements for embankments to be equal to the height of the embankment, of which the last 10’ (was 5’ before) must be in stiff or medium dense soils.
  4. Section 400
    • 401 – added reference to “Geotechnical Engineering Circular No. 5, Evaluation of Soil and Rock Properties,” FHWA-IF-02-034.
    • 401.8 – established minimum survey requirement for river gauge.
    • 402.1 – added reference to ASTM D 1452.
    • 403 – added reference to ASTM D 4700.
    • 403.3 – added requirement to core in accordance with AASHTO T225, except a single tube barrel is not permitted. As a minimum, use a double tube core barrel, swivel type.
    • 407 – added second paragraph discussing requirements to patch pavement section of borings through pavement.
    • 408 – added section in its entirety regarding coring and patching of bridge decks. Added figure 400-2.
    • 410 – defined the task and how to pay for field supervision and field logging as follows:
      • Field coordination and field logging are engineering services to be performed and paid for according to the engineering agreement and the Specifications for Consulting Services. Field coordination includes making arrangements for site access, procuring any necessary permits, clearing utilities, preparing damage reports, and property damage restoration oversight. Field logging includes preparing all records presented in Section 408. The method of compensation for the work involved in field coordination will be actual cost plus a net fee. The method of compensation for the work involved in field logging, if drilling is subcontracted, will beactual cost plus a net fee, otherwise, it will be included in the unit cost of drilling.
  5. Section 600
    • 601 – added reference to “Geotechnical Engineering Circular No. 5, Evaluation of Soil and Rock Properties,” FHWA-IF-02-034, for state of the practice laboratory testing information.
    • 605.12 – added this section in its entirety.
  6. Section 700
    • 702.3.2 – deleted word, “usual” before “descriptions” for clarity.
    • 702.3.5.b – changed to include sample number, including an example, with the requirement not to repeat sample numbers in a boring.
    • 703.2 – added “when possible” to the end of the 2 nd sentence, to account for the possibility of not being able to present all the geotechnical data at the site plan vertical scale with clarity, thus requiring a scale change.
    • 705.8.3.b.2 – added the following to the second sentence, “For the appropriate range of stress conditions selected,”…
  7. Section 800
    • 801 – added the following, “Only modify the proposal format to best represent the proposed labor personnel categories. Otherwise, (do not modify the proposal format.)
    • 802 – added the following, “Only modify the invoice format to best represent the proposed labor personnel categories. Otherwise, (do not modify the invoice format.)
  8. Appendix E
    • Revised proposal-invoice form to replace the one in Appendix E in its entirety (Geotech proposal-invoice.xls)

Oct. 19, 2007

The October, 2007 quarterly update for the SGE is complete. The changes to the body of text and appendices are summarized as follows:

  1. Changed the way we pay for drilling and all field work from actual cost plus net fee to unit cost, affecting sections 409, 507, and 800.
  2. Created a standard cost for laboratory tests, based on recent historic averages, affecting section 607 and presented in Table 600-17. Also created a Classification Package, per Table 600-6, excluding Organic Content by Loss on Ignition, and including Visual Description and Hydrometer category, as presented in Table 600-17.
  3. Revised 702.2 vertical scale to encourage plotting profile at same vertical scale as construction plans when possible.
  4. Revised 702.55 to encourage showing major contours as a minimum (when minor contours compromise showing geotechnical or surface features of interest - show minor contours as well if this is not the case).
  5. Revised 703.3.2 to direct restart of sample numbers for each boring.
  6. Revised Section 800 to address change in how to pay for drilling and field work and including an invoice procedure and form (included in Appendix E) for geotechnical work.
  7. Renamed Appendix E to "Geotechnical Exploration Proposal and Invoice Forms" and replaced the Proposal Form with the Proposal/Invoice Form.
  8. Included a sample Soil Profile in Appendix D

July 13, 2007

The July, 2007 quarterly update for the SGE is complete. The changes to the body of text and appendices are summarized as follows:

  1. Section 302.1 - made note of the fact that all reference to blow counts for determination of boring depth, refers to N60
  2. Section 302.5.2 - revised the culvert boring requirement to include a two borings drilled to 20 feet below the culvert invert for pipe culverts and box culverts with spans less than 10 feet and no embankment borings planned, for example, for a culvert replacement.
  3. Section 404.2 - changed hammer calibration requirement to once every two years and after hammer system repair.
  4. Section 404.3 - directed that refusal blow counts do not need to be corrected.
  5. Section 605.4 - Made note not to describe weathering of coal, fireclay, underclay
  6. Section 702.6.3.i - changed language from "exceeding" (25% and 19%) to "greater than or equal to"
  7. Section 703.1 - direction to report scour data (diameter) in metric units.
  8. Appendix D, “Soil and Rock Symbology" chart - direction is given not to use weathered hatch for coal, fireclay, or underclay.

May 10, 2007

Minor corrections to Figure 500-6 and Figure 500-7

April 20, 2007

Most of the changes made in this quarterly update are grammatical in nature, for the purposes of either correction or clarification or both. Changes made that identify specific omissions or changes are presented as follows:

  1. Section 103: The title was changed from “Extent of Exploration” to Exploration Tasks”
  2. Section 200: The section title was changed from “Geotechnical Red Flag Study” to “Geotechnical Red Flag Summary”, to be consistent with the PDP.
  3. Section 205: The standard deliverable for “Geotechnical Red Flag Summary” has been changed to completion of the geotechnical portion of the Red Flag Summary, to be consistent with the PDP. It is noted that, if ODOT desires and identifies it in the Scope of Services, an independent report titled, “Geotechnical Red Flag Study” may be prepared in accordance with these specifications, in addition to completion of the Red Flag Summary.
  4. Sections 301.1.1 and 301.3.4: Included in the itemized considerations are plan drainage features and documentation of condition and functionality of existing drainage features, respectively.
  5. Section 301.2: Review Red Flag Summary as part of the office reconnaissance.
  6. Section 405.4: Undisturbed sample length limit changed from 30 inches to 24 inches.
  7. Section 602: Clarification of examples and visual descriptions of soils presented.
  8. Section 604: “Strength and Consolidation Testing of Soils” subcategories changed to “Laboratory Strength and Consolidation Test Methods” (Section 604.1) and “Index Strength Tests” (formerly “Hand Penetrometer and Torvane Tests”). It was also added, “Do not rely solely on these index strength results to determine strength parameters for final design. Use these results for relative consistency and strength, and comparative indication to anticipated and achieved laboratory and field test results.”
  9. Section 701: It was added, “Clearly identify on every submission (reports, plan drawings, etc.), the geotechnical specification (title and date) under which the geotechnical work was contracted and performed.”
  10. Sections 702.2 and 702.3.3: Reference to ODOT L&D Manual Volume 3 added for clarification.
  11. Section 702.3.5: Added clarification on the presentation of Summary of Soil Test Data.
  12. Section 702.5: Added clarification on the presentation of Surface Data.
  13. Corrected references where to find the Soil and Rock Symbology Chart from Appendix A to Appendix D (where it was and is).
  14. Section 703.2: Added clarification on rock descriptions for Structure Foundation Explorations – to be presented on logs, not on profile.
  15. Section 703.2: Noted that the plan and profile for Structure Foundation Explorations prepared for culverts greater than 10 feet in diameter or span are to be presented along the flow line of the culvert, not along the road.

March 6, 2007

Added Structure Foundation Exploration Sample Plan Sheets to Appendix D.

Jan. 30, 2007

Added Interbedded Shale and Limestone to Soil and Rock Symbology.

Jan. 19, 2007

Original SGE Document and Appendices A through F