Remediation of an MGP Site Utilizing a Design/Build Approach

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Remediation of an MGP Site Utilizing a Design/Build Approach

Authors:
Steve Anagnost and Brian White (OBG)
Wayne Mancroni and Mark McLean (Central Hudson Gas & Electric)
Lisa Gorton and Will Lindheimer (Land Remediation, Inc.)

 

Presenter:

Steve Anagnost

OBG

Speaker Bio:

Steve Anagnost is a New York State licensed Professional Engineer with over 35 years of experience in geoenvironmental and geotechnical design and construction. He received a Bachelor of Science in Environmental and Resource Engineering from the State University of New York College of Environmental Science and Forestry and a Masters of Science in Civil Engineering from Syracuse University. Steve is a Senior Managing Engineer with O’Brien & Gere who has responsibility for directing complex geoenvironmental and geotechnical design projects. He has been involved in MGP site remediation for over 10 years and has served as Engineer-of-Record on multiple MGP sites.

Abstract:

The former Kingston Manufactured Gas Plant (MGP) is approximately 1.7 acres in size located in the City of Kingston, New York adjacent to Rondout Creek.  In 2008, Central Hudson Gas & Electric Corporation (Central Hudson) entered into a Brownfield Cleanup Agreement (BCA)with the New York State Department of Environmental Conservation (NYSDEC) requiring Central Hudson to address on-site and off-site impacts, including soils and sediments, from the former MGP.   Central Hudson elected to perform the remediation using a design/build approach which allowed Central Hudson and the team of OBG/NRT and Land Remediation, Inc. (LRI) to work cooperatively to cost-effectively address permitting, scheduling, and technical challenges associated with this project.  Examples discussed in this paper include:   Cost-effective integration of upland in-situ stabilization with the design and construction of a permanent sheet pile bulkhead adjacent to Rondout Creek.   The decision to incorporate fish habitat structures into the sediment restoration design to enhance overall habitat and assist in obtaining an extension to a limited regulatory window for in-water work.   Adjustment of the planned schedule for site activities during construction with minimal cost impact to address the timing of receiving permits.   Mutual agreement on the diver assisted methods to locate subaqueous gas lines, the vertical and horizontal limits of which were unknown during the bid period.  The locations of these gas lines were critical due to the need to dredge adjacent to them and place a reactive cap over them.   Dredging of approximately 20% more sediment than called for in the original bid documents with minimal schedule impact.  The design/build approach selected by Central Hudson coupled with continuous, open communication between Central Hudson and the OBG/NRT/LRI team throughout construction resulted in a technically sound, cost-effective project being delivered in a timely fashion despite multiple challenges encountered during construction.

 

To view the full Agenda for MGP 2017 view this link:

http://mgpsymposium.com/agenda/

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