Deep Panuke Project Description - Encana

The pipeline will be trenched where the water depth is shallow, as dictated by design requirements. Thiswill also reduce span correction and reduce the potential for sediment scour to the pipeline. The pipelinewill be designed to withstand impacts from conventional mobile fishing gear in accordance with the DetNorske Veritas (DNV) Guideline No. 13, Interference Between Trawl Gear and Pipelines, September,1997.The proposed offshore pipeline routes for both the M&NP Option and the SOEP Subsea Option arepresented on Figure 2.3. The following criteria were used to determine the proposed pipeline route:• Minimize the environmental effects, seabed disturbance, and effects to fisheries due to theinstallation and operation of the new pipeline.• Minimize the pipeline route length where possible while still satisfying all other route criteria.• Minimize the number of subsea pipeline and cable crossings. Where crossings are unavoidable,routing of the pipeline shall, where possible, have a crossing angle of greater than 30°.• Consider any known future pipelines.• Consider concerns raised by landowners and stakeholders.• The pipeline route shall be such that “normal” pipelay operations (pipelay vessel) are not precludedand appropriate minimum horizontal radius of curvature (to be defined during detailed design,dependent on the pipeline size and water depth) could be kept.• Consider approaches near the MOPU (which may be installed in advance of the pipelineinstallation) to ensure compliance with safety and layout requirements.• The shore approach routing shall be such to enable shore pull-in systems to be as simple aspossible. Due consideration shall be made of the existing SOEP pipeline in the close confines ofthe harbour.• Within the limits of the lay corridor and SOEP pipeline proximity requirements, route selectionshall minimize potential pre-lay works (pre-sweeping, etc.) and post-lay rectification requirementsfor freespans.Deep Panuke Volume 4 (Environmental Assessment Report)• November 2006 2-6