ROVER PIPELINE PROJECT Supplement Resource Report 6 –Geological Resources VOLUME IIB ATTACHMENT 6B Geotechnical Data Report June 2015 Expected Geotechnical Conditions Report for Geohazards Search Proposed Rover Pipeline Project (PCS # 14138) June 4, 2015 Terracon Project No. N4149328 Prepared for: Project Consulting Services, Inc. Prepared by: Terracon Consultants, Inc. Columbus, Ohio EXPECTED GEOTECHNICAL CONDITIONS Report for Geohazards Search Proposed Rover Pipeline (PCS #14138) West Virginia, Pennsylvania, Ohio & Michigan Terracon Project Number N4149328 June 4, 2015 1.0 INTRODUCTION Terracon has completed a review of publically available geohazard data and our records in the vicinity of the proposed alignment to render this preliminary opinion of expected geohazard conditions. 1.1 Project Location and Description Item Description Project description Geohazard Desktop Study Project location Pipelines crossing WV, PA, OH and MI Pipeline alignment Ten (10) Laterals with Alternative Alignments 2.0 PROJECT INFORMATION The following project information was available at the time this report was prepared. We understand that if changes to the project occur, updated analysis and recommendations will be provided upon request. 2.1 Desktop Study Scope of Services This desktop study included a review of publically available data collected and made available by public entities (i.e. federal, state, and local agencies) and data-mining of past Terracon projects within the vicinity of the subject project. A project geodatabase was compiled to organize the above mentioned data, including information from the publically available sources as noted in the following section. A geodatabase was utilized as input for GIS mapping and to generate geotechnical- themed strip maps of the pipeline corridor; the results of this desktop study were used to prepare a desktop assessment of geotechnical conditions that may affect construction and/or pipeline integrity. Responsive ■ Resourceful ■ Reliable 1 Expected Geohazard Conditions Proposed Rover Pipeline, Project (PCS #141138) West Virginia, Pennsylvania, Ohio & Michigan Terracon Project Number N4149328 June 4, 2015 Note: Field reconnaissance, subsurface exploration, laboratory testing and geotechnical analyses are beyond the scope of this study. However, we are currently in the process of completing an aerial survey on behalf of Project Consulting Services®, Inc. (PCS) to review ground surface conditions in order to observe for surficial indicators of ground movement and identify areas of interest (AOI) for further site assessment. After discussion with the PCS representatives, Terracon will coordinate and arrange ground truth site visits of such areas of concern. Terracon teams will be dispatched to the project sites to conduct visual site reconnaissance with the objective of confirming or refuting the presence of slope instability concerns and baseline visual assessment. The objective will be to evaluate the need for further geotechnical study, as needed to develop methods to remediate the slope instability and/or mitigate impacts to construction and/or service of the pipeline. Responsive ■ Resourceful ■ Reliable 2 Expected Geohazard Conditions Proposed Rover Pipeline, Project (PCS #141138) West Virginia, Pennsylvania, Ohio & Michigan Terracon Project Number N4149328 June 4, 2015 2.2 Information Sources The proposed alignment and general information about the project were provided by PCS representative, Jeff Richardson, P.E. Information utilized as a part of our review included the following public records: Ohio: Ohio Department of Natural Resources Geographic Information Systems Geological Survey Mineral Resources Ohio Department of Transportation Pennsylvania: Pennsylvania Department of Conservation and Natural Resources Pennsylvania Department of Environmental Protection Pennsylvania Spatial Data Access West Virginia: West Virginia GIS Technical Center West Virginia Geological and Economic Survey (WVGES) Michigan: Michigan Department of Technology, Management, and Budget GIS Open Data Portal We complemented the public records review with a query of Terracon’s internal database which is comprised of historic records derived from projects conducted in the vicinity of the project. 2.3 Project Description The proposed construction of approximately 511 miles of pipeline consists of ten (10) pipeline segments through four (4) states. Branches of the alignments begin in Pennsylvania and West Virginia and connect to a mainline running through Ohio and terminating in Michigan. Exhibit I shows the alignments of these pipeline laterals. In the following table, the mileage for each lateral, Responsive ■ Resourceful ■ Reliable 3 Expected Geohazard Conditions Proposed Rover Pipeline, Project (PCS #141138) West Virginia, Pennsylvania, Ohio & Michigan Terracon Project Number N4149328 June 4, 2015 based on the kmz file provided, is presented with a breakout of the distances through each state. In addition, the orientation of the straight line mileage along each named lateral is noted. LATERAL TOTAL LENGTH LENGTH LENGTH LENGTH ORIENTATION NAME LENGTH IN WV IN OH IN PA IN MI (Miles) (Miles) (Miles) (Miles) (Miles) Berne 3.75 3.74 S-N Burgettstown 51.50 5.27 36.02 10.21 E-W Cadiz 3.52 3.51 E-W CGT 5.70 5.70 W-E Clarington 32.96 32.95 S-N Supply 209.66 209.62 S-N Connector/ Mainline Majorsville 23.83 11.28 12.55 E-W Market 99.94 27.38 72.66 S-N Seneca 25.74 25.73 W-E Sherwood 54.0 35.7 18.3 S-N 510.61 46.71 368.48 22.76 72.66 The following sections of the report present discussions on the compiled geohazard information: • Geology and terrain traversed by the proposed pipeline corridor, • Landslides • Surface Mine Settlement • Underground Mine Subsidence • Identification of Terracon projects located within one (1)-mile radius of the project’s centerline. 2.4 Preliminary Nature The expected geotechnical conditions presented in this report are based on a review of publically available data. Therefore, opinions derived from publically available data are contingent upon the accuracy of that information. The scope of services for this desktop study addresses geotechnical conditions only. The scope does not include either specifically or by implication any environmental or biological (e.g., Responsive ■ Resourceful ■ Reliable 4 Expected Geohazard Conditions Proposed Rover Pipeline, Project (PCS #141138) West Virginia, Pennsylvania, Ohio & Michigan Terracon Project Number N4149328 June 4, 2015 asbestos, mold, fungi, and bacteria) assessment of the site or identification or prevention of pollutants, hazardous materials or conditions. This report has been prepared for the exclusive use of our client to represent a professional assessment of the publically available geotechnical conditions for specific application to the project described above. No warranties, either express or implied, are intended or made. 3.0 EXPECTED GEOTECHNICAL CONDITIONS 3.1 Geography, Terrain, and Geology of the Proposed Pipeline Corridor The pipeline project transverses the Appalachian Plateau Province in Ohio, Pennsylvania, and West Virginia. The pipeline then crosses the Glaciated Allegheny Plateaus in Ohio and continues into the Central Lowlands Province in central and western Ohio and Michigan. 3.1.1 Terrain of the Physiographic Provinces Through the Appalachian Plateau region in Pennsylvania, West Virginia, and Ohio, the corridor passes along a rugged, eroded plain of sedimentary rock, marked by flat-topped highlands and rounded hills. The terrain consists of landforms drained by mature-stage streams with well- developed floodplains and meanders. Typical relief for the region is several hundred feet. As the corridor crosses north and west through Ohio, it crosses the glacial boundary and enters the Glaciated Appalachian Plateau Province. The terrain in this area is characterized by ridges and flat uplands with moderate relief. Deposits of thin drift are dissected by narrow rock-exposed steep valleys alternating with broad drift-filled stream floodplains. In some areas, hummocky glacial deposits may be encountered. These deposits may include kames, kame terraces, eskers, and bog/fens. West of the Glaciated Appalachian Plateau, the Till Plains of the Central Lowland Province are encountered. The clayey to loamy tills of this province have low to moderate relief. Glaciation of these areas resulted in well-defined moraines, boulder belts, and flat-lying ground moraines. Stream valleys contain eroded glacial outwash deposits forming narrow dissected valleys to broad floodplains. In northwestern Ohio, the pipeline crosses a remnant of an ancient lake plain. The Huron-Erie Lake Plain Province is a flat lying lake basin with beach ridges, bars, dunes, deltas, and clay flats. Relief is very low with the exception of a small ancient bedrock reef area. The pipeline then continues across the northern boundary of Ohio and terminates in Michigan as it re-enters the Central Lowland Province. This region is dominated by a series of end moraines Responsive ■ Resourceful ■ Reliable 5 Expected Geohazard Conditions Proposed Rover Pipeline, Project (PCS #141138) West Virginia, Pennsylvania, Ohio & Michigan Terracon Project Number N4149328 June 4, 2015 consisting of low ridges and much flatter outwash plains and ground moraines. The Central Lowlands of Michigan is characterized by gently rolling to hilly terrain with moderate relief. 3.1.2 Geology of the Physiographic Provinces Within the Allegheny Plateau, the surface geology is typically comprised of shallow