Steps to migrate SVN repository.
svnadmin dump <location_of_old_repo> > dump_filename
svnadmin load <location_of_new_repo> < dump_filename
Eg:
svnadmin dump /var/svn/myproject > /tmp/myproject.dump
svnadmin create /var/svn/mynewproject
svnadmin load /var/svn/mynewproject < /tmp/myproject.dump
To check everything is okay.
svnadmin verify /var/svn/myproject
svnadmin verify /var/svn/mynewproject