Geological / Groundwater Evaluation Projects

Geophysical Survey: Prepared and submitted preliminary site investigation request and detailed site investigation (DSI) work plan to the Missouri Department of Natural Resources-Geological Survey Program (MDNR-GSP) for a proposed 40-acre utility waste landfill within the New Madrid Seismic Zone of Scott County, Missouri.  Services included the planning and oversight of a comprehensive geophysical survey for the initial phase of the DSI, which consisted of ground penetrating radar (GPR) technology to identify potential morphoseismic features (caused by liquefaction).  Services also included the excavation and description of verification soil test pits and the GPR survey report preparation for submittal to the MDNR-GSP. 

Groundwater Monitoring & Statistical Analysis: Services provided included the collection of quarterly groundwater samples, water quality analytical review, and groundwater monitoring reports of the 36 monitoring well network at the Ameren Missouri Labadie Energy Center's utility waste landfill.  Services also included the preparation of a Sampling and Analysis Plan (SAP) and the statistical analysis of eight rounds of background water quality data. 

Karst Assessment: Provided a professional opinion concerning an impoundment (i.e., pond) located on a property in Boone County, Missouri to determine if the impoundment was an actual karst-related sinkhole.  The karst assessment was a requirement of the county health department for the permit approval of an onsite wastewater treatment system (OWTS) to serve a proposed single-family residence that was geologically mapped in the Burlington-Keokuk Limestone bedrock, where sinkhole development is extensive.  Services included a site evaluation, geological literature review and letter report regarding the site. 

References Available Upon Request


  • Winderl joins GREDELL Engineering

    Nathan Winderl, E.I., recently joined the staff of GREDELL Engineering Resources, Inc. (Gredell Read More

  • GO CHIEFS!!!!

    Staff are having a GO CHIEFS Pep Rally today!! Jefferson City staff joined in the fun wearing our Read More

  • Connie Walden Co-Presents on Water Upgrades at 2020 MWWC Virtual Training Series

    Connie Walden, Ph.D., E.I., GREDELL Engineering Resources, Inc., co-presented with Elke B. Boyd, Read More

  • Welcome Debbie Hartman

    Debbie Hartman recently joined the staff of GREDELL Engineering Resources,Inc. (Gredell Engineering) Read More

  • Association of Conservation Engineers Virtual Conference

    GREDELL Engineering Resources is sponsoring the 2020 Association of Conservation Engineers Virtual Read More

  • Open House - Celebrating 20th Year in Business!!

    Our Open House yesterday was a huge success. We appreciated seeing so many of our friends and Read More

  • Ribbon Cutting at MO State Highway Patrol Firing Range

    GREDELL Engineering Resources, Inc. (Gredell Engineering) attended the ribbon cutting ceremony at Read More

  • Pendergrass Joins Gredell Engineering

    Gary Pendergrass, P.E., R.G., recently joined the staff of Gredell Engineering as a Senior Project Read More

  • Elke Boyd to Present on Water Upgrades at the 2020 MWWC Joint Annual Meeting

    Elke B. Boyd, P.E., BCEE, Senior Civil Engineer with GREDELL Engineering Resources, Inc., will be Read More

  • 2020 MWEA/AWWA Joint Annual Meeting Cancelled

    Unfortunately, due to the increasing COVID-19 infection rate, employer travel restriction, and Read More

  • Gredell Engineering Continues Internship Program During COVID-19

    Chandler Olmsted recently joined the staff of Gredell Engineering as an engineering intern. Chandler Read More

  • Elke Boyd Presented on Wastewater Irrigation at MRWA Northeast Training Day

    Elke B. Boyd, P.E., BCEE, Senior Civil Engineer with GREDELL Engineering Resources, Inc., presented Read More

  • Staff Attend MWCC Conference

    GREDELL Engineering Resources, Inc. staff recently attended the 2019 Missouri Waste Control Read More

  • City of Lanagan Obtains Grant Funding for Water System Upgrades

    “Access to clean, safe drinking water and reliable, modern wastewater treatment is a necessity Read More

  • Mikel Carlson 25 Years as Geologist

    Mikel Carlson, R.G., of GREDELL Engineering Resources, Inc. is recognized by the Division of Read More

  • 2020 Review

    Welcome 2021!  We all likely agree that 2020 had its ups and downs and all of us are ready to Read More