Pipeline maps related documents

  • d42eb57bde417999

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    Oregon LNG Export Project Resource Report 10Alternatives Response to September 20, 2012, Environmental Data Request PF12-18-000 Batches 1 and 2: Data Requests 3 through 8 November 1, 2012Data Section/Page Request (if No. applicable) Data Request Response 3 Provide descriptions of major pipeline route alternatives considered that would A more northerly route was investigated from approximately milepost begin at MP 47.5 and 1) end at the proposed location for interconnecting with the (MP) 72 to the existing Williams Northwest Pipeline (NWP) Columbia River Northwest Pipeline in Woodland, and 2) end at other locations for the interconnect crossing at the north end of Deer Island. The intent was to use existing with the Northwest Pipeline, such as between Kelso and Kalama. If no other utility corridors such as the NWP Deer Island-Kalama-Mainline corridor as alternatives were considered, explain why. much as possible and to reduce the overall distance that natural gas would have to travel from Sumas to Warrenton by connecting to the NWP approximately 5 miles farther north. Initial research also suggested that the existing Deer Island Columbia River horizontal directional drill (HDD) site would be suitable for additional HDDs as Williams pipeline maps indicated two existing crossings at this location, one 12-inch and the other 16-inch. However, further research into this route uncovered the following drawbacks, which eventually led the team to discard this option: Multiple small landowners on the Oregon side of the Columbia River would be affected. The transition from the highlands to the river valley at the north end of Deer Island on the Oregon side of the Columbia River is steep and rocky. The NWP map for the area illustrates two under-river HDDs at this location; however, the map contains an error and in reality, only one HDD exists under the Columbia River in this location. Furthermore, anecdotal information suggests that the HDD at this location had been a challenging effort in spite of its small diameter. The approximately 3-mile existing pipeline corridor on the Washington side of the Columbia River runs through a rural residential area with numerous small landowners.4 In Appendices 10D and 10E, include a map that depicts the entire Green Mountain New Figure 10-11 in Appendices 10D and 10E is a map depicting the entire and Deer Island minor route variations on one page. Also, in the text, explain why Green Mountain and Deer Island minor route variations on one page. these route variations were assessed. Attachment 10-4 to this response matrix contains new Figure 10-11 on aerial and topographic backgrounds. The route variations were assessed as described in the following text. The Deer Island alternative was investigated to combine the benefits of1 OF 5