In-Depth Coal Ash Impoundment Closure
September 25-26, 2017
Denver, CO

Add yourself to our mailing listDownload Brochure


With the impact and enforcement of the Federal Coal Combustion Residuals (CCR) Rule, owners and operators of coal ash impoundments have been engaged in and are facing the closure of their impoundments. This course shares the expertise of industry leaders from multiple closure service providers. The purpose of the course is to give individuals involved with closure projects either directly or indirectly, a more comprehensive understanding of the process and steps involved in closure of these impoundments. The program will dive into detail on a variety of those steps such as: geotechnical work, dewatering, stability issues, civil design, cover design, groundwater monitoring and corrective action, construction approaches and contractor selection.

Learning Outcomes         

  • Review the information to look for in geotechnical investigations and receive recommendations
  • Engage in a discussion on dewatering, ash stabilization and the steps needed and taken during the process
  • Listen to experts discuss structural stability issues and their solutions for closure
  • Discuss the civil design of a closure and its steps and process
  • Review the requirements and types of final cover design
  • Engage in a review of the groundwater requirements, detection systems and best practices
  • Discuss the final site closure and methods and best practices
  • Listen to various construction approaches and methodologies from a contractor’s perspective
  • Engage in an overview of the contractor evaluation process for closure projects



EUCI has been accredited as an Authorized Provider by the International Association for Continuing Education and Training (IACET).  In obtaining this accreditation, EUCI has demonstrated that it  complies with the ANSI/IACET Standard which is recognized internationally as a standard of good practice. As a result of their Authorized Provider status, EUCI is authorized to offer IACET CEUs for its programs that qualify under the ANSI/IACET Standard.

EUCI is authorized by IACET to offer 1.0 CEUs for this event.


Requirements for Successful Completion of Program

Participants must sign in/out each day, be in attendance for the entirety of the course to be eligible for continuing education credit.

Instructional Methods

Case studies, PowerPoint presentations, and group discussion will be used in this event.


Monday, September 25, 2017

7:30 – 8:00 a.m. :: Registration and Continental Breakfast

8:00 a.m. – 5:00 p.m. :: Course Timing

12:00 – 1:00 p.m. :: Group Luncheon


Geotechnical Behaviors of Fine Grained, Non-Cohesive Materials

  • Geotechnical differences between soil and ash
  • Field vs Laboratory testing
  • Moisture sensitivity
  • Capillarity
  • Vibration sensitivity

The Typical “Construction” of an Ash Pond

The Behavior of a Typical Ash Pond as it Pertains to Closure Work

  • Instability 
  • Stable crust thickness
  • Localized liquefaction

Methods of Improving Ash Behavior

  • Drainage techniques
  • Rim ditching and sumping
  • Wellpoints
    • Deep wells
    • Other drainage methods
  • Selecting a drainage (dewatering) technique
  • Access and safety for dewatering system installation
  • Ground improvement methods for ash

What is an “Adequate” Geotechnical Investigation?

  • Investigation for dewatering
  • Investigation for other geotechnical concerns
  • When pilot testing is warranted
  • Different types of pilot tests
  • Groundwater modelling relevant to pond closure

Instrumentation and Monitoring

  • Evaluation of geotechnical data for dewatering
  • Pore water pressure
  • Shear strength

Case Studies in Ash Stabilization

  • Shallow & deep ponds
  • Lined and unlined impoundments
  • Site specific access and safety considerations

Water Treatment

  • Ponded water
  • Ash pore water
  • Available treatment technologies

An Integrated Approach to Closure

  • Relationship between schedule, safety, quality, and cost
  • Project acceleration with early dewatering
  • Design/Build approach

New Advancements in Practice

  • Measurement of geotechnical parameters (and difficult access work)
  • Drainage methods/devices

Structural Stability Issues/Solutions for Closure

  • CCR Rule requirements/State of practice
    • Slope stability, and stability enhancements (e.g., reconfiguration, buttressing, ground improvement)
    • General construction considerations (unwatering, dewatering, sequencing and rate of construction, ground control during construction, water management)
    • Ground control during impoundment capping
    • Construction period and post-closure instrumentation

Civil Design of Closure and Site

  • CCR Rule requirements/State of practice
  • Survey early, survey well!
  • Site constraints (e.g, berms, property lines, wetlands)
  • H&H methodology – methods for evaluation
    • Final Configuration/Re-grading for drainage, to accommodate settlements, for stability, and for potential repurposing of the impoundment
  • Surface water drainage design – accordion drainage, interior, exterior, minimum slopes on mains and laterals
  • Types of ancillary structures of closure
  • Critical items for construction bid package
  • Construction planning and design integration
  • Construction monitoring and management
  • Approach to closure, “clean” closure criteria
  • Post-closure maintenance considerations
  • Groundwater quality, cap settlement and other post-closure Monitoring

Final Cover Design

  • CCR Rule requirements/State of practice
  • Minimum vs recommended system vs alternative caps
  • Geocomposite drainage; depending on liner/cover; required on slopes? Required on top?
  • Geomembrane vs soil liner
  • Synthetic turf vs vegetated soil cover


  • CCR rule requirements/State monitoring programs
  • Monitoring network evaluation and installation
  • Baseline sampling and analysis
  • Detection and assessment monitoring
  • Corrective action and closure triggers

Closure Case Study

American Electric Power’s Amos Fly Ash Pond Closure

Tuesday September 26, 2017

7:30 – 8:00 a.m. :: Continental Breakfast

8:00 a.m. – 12:00 p.m. :: Course Timing

Groundwater Challenges and Impacts

  • Preemptive groundwater corrective action opportunities prior to/during closure
  • Groundwater corrective action technologies for confirmed COC releases
  • Background and monitoring program design, statistical evaluation and response (short and long term)
  • Feasibility/Pilot studies

Contractor Selection Process

  • Selection process overview
  • Evaluating qualifications and experience
  • Evaluating value in the selection process
  • Evaluating the approach to change management
  • Evaluating the contractor’s implementation team and approach

Construction Approach and Methodology

  • Evaluating site conditions and final resting place for CCR
  • CCR Rule evaluation and impact on methodology
  • Factors to consider when evaluating methodology
  • Linking approach and methodology to schedule logic


Bob Baker, P.E., CCR Engineering Manager, Energy Waste Management, Tetra Tech

Graham Crockford, CPG, Senior Client Service Manager – Engineering, Construction, and Remediation, TRC

Don Grahlherr, PE, Vice President, National CCR Practice, Tetra Tech

Kevin Harshberger, P.E., Vice President, R.B. Jergens Contractors, Inc.

Mark Johnson, P.G., Senior Client Service Manager, TRC

Greg Landry, PE, Chief Dewatering Engineer, Moretrench

Christopher Lewis, PE, Senior Project Manager, Tetra Tech

Joel Roberts, VP, Construction Services, TRC

Paul Schmall, PhD, PE, Chief Engineer, Moretrench

Amy Wilson, PhD, PE, Technical Director – Engineering, Construction, and Remediation, TRC


Sheraton Denver Downtown Hotel
1550 Court Place
Denver, CO 80202

To reserve your room, please call 1-303-893-3333 or book online here.
Please indicate that you are with the EUCI group to receive the group rate.

Room Rate:

The room rate is $219.00 single or double plus applicable taxes.

Room Block Dates:

A room block has been reserved for the nights of September 24 – 28, 2017.

Rate Available Until:

Make your reservations prior to September 5, 2017. There are a limited number of rooms available at the conference rate. Please make your reservations early.


EventStandard RateAttendees