! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !!! ! ! ! ! ! ! ! ! ! ! ! L'Anse Amour ! -80 -60 ! Forteau -50 ! ± LABRADOR TROUGH LABRADOR COASTAL -100 ZONE -80 -80 -1 00 L'Anse-au-Clair ! CENTRE BANK NORTH -90 ! -50 CENTRE BANK SOUTH -40 -60 0 -100 Green Island Cove 5 -60 ! - -80 -90 ! Pines Cove ! -100 Shoal Cove ! Sandy Cove ! NEWFOUNDLAND TROUGH -10 -20 Savage Cove ! -9 0 -30 Bathymetry Lines (10 m interval) 00 -1 Submarine Cable Crossing Corridor - ! 1 0 0 0 NEWFOUNDLAND -1 0 Bathymetry * COASTAL High : 127.09 -2 Flower's Cove ZONE0 ! -70 Low : -0.16 Sources: * Fugro Jacques (2007) Location of troughs and banks from Woodworth-Lynas et al. (1992). -60 FIGURE ID: HVDC_ST_406a ! 0 3 6 0 Kilometres -5 -80 ! ! FIGURE 10.5.2-2 ! Bathymetry in the Strait of Belle Isle ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !!! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! !! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! !! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! !!! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! !!! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! !!! ! ! ! ! ! ! ! ! ! ! ! ! !! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Labrador‐Island Transmission Link Environmental Impact Statement Chapter 10 Existing Biophysical Environment Table 10.5.2‐3 Local Ecological Knowledge of Geology and Bathymetry in the Study Area Community Source Indirect Quote Labrador‐Island Transmission Link EA, Strait of Belle Water is shallower on the Flower’s Cove, NL Isle Marine Crossing Meeting participant, Flower’s Newfoundland side of the Straits than Cove, NL, January 12, 2011 the Labrador side Labrador‐Island Transmission Link EA, Strait of Belle Centre Bank is the deepest point out West St. Modeste, NL Isle Marine Crossing Meeting participant, West from Forteau Point St. Modeste, NL, January 13, 2011 10.5.2.3 Descriptions of Seabed Hazards Strait of Belle Isle 5 There have been two earthquakes in the Strait of Belle Isle since 1985, both occurring in November 1999 (Earthquakes Canada 2010a, internet site) (Figure 10.5.2‐3). Earthquakes in the Strait of Belle Isle are measured using the Nuttli Magnitude scale, developed and applied to seismic events in eastern North America (Earthquakes Canada 2010b, internet site). The two earthquakes in the Strait of Belle Isle had magnitudes between 2.6 and 2.7. Earthquakes with a magnitude between 2.5 and 3 produce a low rumbling noise which 10 can be heard by people at rest. Earthquakes of these magnitudes would have no effects on the local environment (Earthquakes Canada 2008, internet site). There is currently one active ocean disposal site in the Strait of Belle Isle, associated with the disposal of fish offal (Public Works and Government Services Canada Environmental Services 2005). This site is located at L’Anse au Loup, at the end of the main wharf near the local fish processing plant, and has a depth of 15 approximately 6 m (Figure 10.5.2‐3). This disposal site is approximately 12 km from the submarine cable crossing corridor. Permit for use of the site has been issued annually to the Labrador Fishermen’s Union Shrimp Company since 1990. The allowable dumping quantity for the site is 1,000 tonnes/year (Public Works and Government Services Canada Environmental Services 2005). There is potential for unexploded ordinance within the Strait of Belle Isle (Figure 10.5.2‐3). The HMS Raleigh, 20 equipped with 190 mm, 152 mm, and 127 mm guns, ran aground off Point Amour, Labrador, in August 1922 in shallow water (<30 m), carrying approximately 900 naval rounds (Fugro Jacques GeoSurveys Inc. 2008). It is believed that the wreck and ordinance were spread over an area of approximate 200 m x 50 m (10 ha). The DND has completed a three‐year remediation effort focused on conducting underwater detonation of the remaining ordinance due to the risk associated with munitions washing ashore. This area is approximately 25 5 km north‐east of the submarine cable crossing corridor. There are no pipelines, cables or other infrastructure on or in the seabed within the Strait of Belle Isle (Canadian Hydrographic Services (CHS) 2002). There are 17 shipwrecks in the Study Area, but none within the submarine cable crossing corridor (Barron, n.d. internet site) (Figure 10.5.2‐3). The depths of these wrecks vary betweend 10 an 70 m (Fugro Jacques GeoSurveys Inc. 2010). 30 April 2012 Page 10‐244 ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !!! ! ! ! ! Earthquake Magnitude* I Shipwrecks**** ! 1 ^ L' Anse au Diable ! Electrode Site ± ! 2 Roads ! 3 Transmission Corridor ! 4 Submarine Cable Potential Unexploded Crossing Corridor E E Ordinance Site ** Strait of Belle Isle Marine Study Area *** Red Bay )" Disposal Sites ! Sources: Ferry Route FIGURE ID: HVDC_ST_446a * Earthquakes Canada (2010a, internet site) ** LGL (2005) *** Public Works and Government Services 0 10 20 QUEBEC Pinware ! Canada, Environmental Services (2005) ! **** Barron (n.d) LABRADOR West St. Modeste Kilometres ! Raleigh ^ ! L'Anse-au-Loup )"! Forteau! IIIII !I IEI Blanc-Sablon! ! I L'Anse-au-ClairIII II I I I St. Anthony ! Sandy Cove Savage CoveI! I I! II Flower's Cove I ! ! ! ! Saint-Augustin Anchor Point ! ! ! ! ! Bird Cove ! ! ! ! ! ! Conche Roddickton ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Port au Choix ! ! ! !! ! FIGURE 10.5.2-3 ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Potential Seabed Hazards in the Strait of Belle Isle ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !!! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! !! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! !! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! !! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! !! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! !