| Abstract/Description or Keywords |
AMEC Environment & Infrastructure, a division of AMEC Americas Limited (AMEC), has prepared a hydrology baseline and estimated peak design and construction period flows associated with the watercourse crossings along the proposed Westcoast Connector Gas Transmission Project pipeline in central British Columbia (BC). This report has been prepared for Westcoast Connector Gas Transmission Ltd. (WCGT) under a contract with Spectra Energy Transmission Inc. (Spectra Energy). BG Group (BG) is a partner with Spectra Energy in the development of the proposed project The proposed pipeline alignment (shown on Figure 1 as the primary route) begins 100 km northwest of Fort St. John, BC. The alignment proceeds south and then west, crossing Williston Lake near Mackenzie, and continuing west towards the west coast. Two alignments are being considered for the route west of the Dease Highway: • The Kitsault Route which continues west to the headwaters of Hecate Strait; and The Nasoga Route which continues southwest towards Prince Rupert and then west towards Pearse Island (approximately in the vicinity of Laxgalt’ap). The Primary-Kitsault route has a total length of approximately 673 km; the Primary-Nasoga route (terminating near Pearse Island) has a total length of approximately 750 km. In addition to establishing baseline hydrology along the proposed pipeline route, peak design flows and maximum, average and minimum daily discharges were estimated for 188 watercourse crossings: • 136 along the Primary Route, including 7 alternate crossings and 7 additional crossings proposed by AMEC; • 41 along the Nasoga Route, including 5 alternate crossings; and • 11 along the Kitsault Route, including 3 alternate crossings. The crossing list was provided by the geotechnical design team for the project. |
