Addendum #4 To Phase I Cultural Resources Survey of the Proposed Elba Coldwater Compressor Station Project, Elbert County, Georgia for the Proposed Elba Express Company LLC Modification Project, HP-060217-004

This addendum report describes the results of the additional Phase I cultural resources investigations completed as part of the proposed Elba Express Company, L.L.C. 's 1 (EEC) Modification Project (formerly known as Elba Coldwater Compressor Station) in Hart County, Georgia (Figures 1 and 2). The EEC Modification Project proposes to add compression to the existing Elba Express Pipeline to provide additional north-to-south transportation capacity. The EEC Modification Project currently is under review by the Federal Energy Regulatory Commission (FERC). This document expands upon the results of archeological investigations performed in 201 1, 2012, and 2013 (Crowe et al. 2011; Leben etal. 20 12; Fogg and Eberwine 2013; Leben and Eberwine 2013). The additional project items reported on herein totaled approximately 2.8 ha (7.0 ac) in size and they included an expansion to the existing compressor station property and a new access road (Figures 1, 2, and 3). The proposed project areas are located adjacent to EEC's existing 36- inch pipeline at approximate milepost (MP) 11. 1. AECOM Technical Services, Inc. (AECOM) performed this investigation in August of 2017 on behalf of EEC. As a result of the investigation, a single new archeological site, Site 9HA158, was identified along the examined access road.

In depth information pertaining to the natural, prehistoric, and historic settings of the region is contained in the previously submitted and reviewed cultural resources survey reports entitled Results of the 2006 Phase I Cultural Resources Survey and Archeological Inventory of the Proposed Elba Express Pipeline Project in Effingham, Screven, Jenkins, Emanuel, Burke, Jefferson, Glascock, Warren, McDuffie, Wilkes, Elbert, and Hart Counties, Georgia (Eberwine et al. 2006) and Results of the 2011 Phase I Cultural Resources Survey of the Proposed Elba Coldwater Compressor Station Project in Elbert County, Georgia (Crowe et a!. 2011 ). What follows is a brief description of the previously identified cultural resources and cultural resources investigations located in proximity to the project area, a description of the field methodologies used to complete the investigation, and a discussion of results of survey.