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Lessons Learned - Design and Implementation of Sediment Remediation Projects
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Sediment remediation projects can push the best consultants, clients, and regulators out of their comfort zone without knowing they left.  After all, what is so difficult about sediment remediation? We collect data, design around a cleanup goal, and implement the design.  This sounds like every remediation project; except for a major difference, the work is underwater.  Although each project contains unique challenges, there are trends that tend to repeat themselves across projects, regions, and practitioners based on combining personal and peer experiences.  The trends are perhaps driven by applying land-based remediation precision, accuracy, and expectations to in-water construction. These in-water construction projects result in an array of new terms, equipment, technology, and other variables that are typically not used or accounted for in land-based projects.  Sharing and discussing these trends are the basis of this lessons learned discussion.  Applying these lessons learned can help avoid impacts to cost, schedule, and possibly professional reputation.



Lessons learned across five (5) project examples serve to frame the discussion.  Through the project examples, we'll demonstrate the real-life applicability and remedies to establishing expectations, balancing risk, reducing rework, and achieving cost and schedule consistency.  Each project example focuses on an individual aspect across the following primary categories: key terms; data collection and analysis; cost estimating and scheduling; design; procurement; and construction. The examples intend to demonstrate: (i) the value of defining commonly-used terms in the project's context; (ii) the relevance of having surveys be contemporary to design and bidding; (iii) the rationale for integrating design-relevant and construction bid-informative characterization into delineation; (iv) the significance of accounting for reasonable construction tolerances and material properties in cited quantities and performance criteria; (v) the importance of utilizing available materials and equipment when establishing cost and schedule forecasts; (vi) techniques for accommodating change during remedial action; (vii) methods for minimizing substantial pricing variances across the submitted bids; and (viii) strategies for structuring the procurement package and construction project to yield both responsive bids and an owner-engineer-contractor common end goal.

Results/Lessons Learned


Although it is unreasonable to expect any design or construction project to be implemented without some form of confusion and change, sharing lessons learned can make our future projects more successful.  Sharing the lessons learned using project examples is intended to illustrate common situations that frequently occur on sediment remediation projects through either the planning, design, or construction phases.  The discussion is not intended to be an all-inclusive list of lessons learned, and you will not walk away as an expert.  However, raising awareness and proactively addressing and incorporating the lessons learned will allow us to execute projects in a more successful and predictable pattern as practitioners in a growing industry.

Publication Summary

  • Geosyntec Authors: Jason Raimondi, PE (Geosyntec Consultants, Pennington, NJ, USA)
  • All Authors: Jason Raimondi, PE (Geosyntec Consultants, Pennington, NJ, USA)
  • Title: 2023 Battelle Sediments Conference
  • Event or Publication: Event
  • Practice Areas: Sediment assessment and remediation, Contaminated site assessment and clean up
  • Citation: Battelle's International Conference on the Remediation and Management of Contaminated Sediments at the JW Marriott in Austin, Texas, on January 9 through 12, 2023
  • Date: January 9 through 12, 2023
  • Location: JW Marriott in Austin, Texas
  • Publication Type: Platform Presentation