Notice of permit
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Regional or Local Number: : DFO-CA SECT 73 SARA C&A 10-002
Notice is hereby given that pursuant to the provisions of section 73 of the Species at Risk Act permit no. : DFO-CA SECT 73 SARA C&A 10-002 is issued.
Activity necessary or beneficial to the species
The Medway Sanitary Trunk Sewer project involves the installation of a sanitary trunk along the Medway Valley to service the communities in north London. Phase 2B of the Medway Sanitary Trunk Sewer is the final extension of the Medway trunk sewer. Phase 2A was constructed in 2007 and involved two crossings and associated mussel relocation and monitoring. The current phase, 2B, involves three crossings on Medway Creek and associated mussel relocation and monitoring. The total estimated prescribed search area for all three crossings is 1828 m2. In addition to the three crossing sites, two other areas need to be searched for mussels, including the relocation area and a control area. The presence of mussels in these areas will be documented to assess the potential impact, if any, of relocated mussels on the population of mussels already living in the relocation sites. Growth and survival of relocated mussels will be monitored and compared to mussels endemic to the relocation site (i.e., control mussels) at one month, one year and two years post re-location.
Start Date: 2010-03-25 End Date: 2010-12-31
Issuing Authority: Department of Fisheries and Oceans
- Species at Risk Act
Location of Activity (province, territory or ocean):
a) Reasonable alternatives to the activity that would reduce impact on species The classical methods (Suber sampler, Ponar grab, Peterson grab, etc.) for collecting benthic organisms are likely to cause harm to mussels. Hand picking is by far the best method to keep the likelihood of harm low b) Feasible measures will be taken to minimize impact of activity on species or critical habitat or residence Unionids are best collected by hand, not by grabs or suction devices. Grabs have powerful jaws which could crush thin-shelled species and juveniles. Suction devices would collect juveniles and light mussels but no heavier, thick-walled species like Actinonaias. Much of the bottom of Medway Creek is cobble and gravel, with some silt and detritus. Sediment between rocks will have to be removed by hand. Large areas of sand and gravel substrates would best be removed using rectangular plastic buckets. Buckets would retain more juveniles than using hands sicne some juveniles may be lost through the fingers while transferring to the sieve. c) Activity will not jeopardize the survival or recovery of the species No. The propose activities for this permit will allow us to move all mussels species within the PSA before the sewer extension activities begin.
Regional Manager, Species at Risk Program
Freshwater Institute, Ontario and Prairie Region, Fisheries and Oceans Canada
501 University Crescent