!
0 -6
-5 0
Forteau
LABRADOR TROUGH LABRADOR COASTAL ZONE
!
±
L'Anse Amour -8 0
!
-1 0 0
L'Anse-au-Clair
-90
-10
0
-80
-8 0
CENTRE BANK NORTH
!
-5 0
CENTRE BANK SOUTH
-5
-4
-60 -8
0
-100
-90
-10
-6
!
!
!
-10 0 -2
-1
-9 0
!
-30
00
-
1 00
0
0
0
NEWFOUNDLAND TROUGH
- 1 00
0
NEWFOUNDLAND COASTAL -2 ZONE
-70
!
0
Green Island Cove
Pines Cove
Shoal Cove
Sandy Cove
Savage Cove Bathymetry Lines (10 m interval) Submarine Cable Crossing Corridor
!
Flower's Cove
Bathymetry * High : 127.09 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 Kilometres
0
-5
-8 0
!
FIGURE 10.5.2-2
Bathymetry in the Strait of Belle Isle
6
Labrador‐Island Transmission Link
Table 10.5.2‐3
Environmental Impact Statement Chapter 10 Existing Biophysical Environment
Local Ecological Knowledge of Geology and Bathymetry in the Study Area
Community
Source Labrador‐Island Transmission Link EA, Strait of Belle Isle Marine Crossing Meeting participant, Flower’s Cove, NL, January 12, 2011
Flower’s Cove, NL
Labrador‐Island Transmission Link EA, Strait of Belle West St. Modeste, NL Isle Marine Crossing Meeting participant, West St. Modeste, NL, January 13, 2011
Indirect Quote Water is shallower on the Newfoundland side of the Straits than the Labrador side Centre Bank is the deepest point out from Forteau Point
10.5.2.3
Descriptions of Seabed Hazards
Strait of Belle Isle 5
10
15
20
25
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 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 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, equipped with 190 mm, 152 mm, and 127 mm guns, ran aground off Point Amour, Labrador, in August 1922 in shallow water (