Beginning at the southwest corner of township one hundred fifty-nine north, range eighty-three west of the fifth principal meridian; thence east along the line between townships one hundred fifty-eight and one hundred fifty-nine north to the southeast corner of township one hundred fifty-nine north, range eighty-one west; thence north along the line between ranges eighty and eighty-one west to the southwest corner of township one hundred sixty north, range eighty west; thence east along the line between townships one hundred fifty-nine and one hundred sixty north to the southeast corner of township one hundred sixty north, range seventy-six west; thence south along the line between ranges seventy-five and seventy-six west to the southwest corner of township one hundred fifty-nine north, range seventy-five west; thence east along the line between townships one hundred fifty-eight and one hundred fifty-nine north to the southeast corner of township one hundred fifty-nine north, range seventy-four west; thence north along the line between ranges seventy-three and seventy-four west to the northeast corner of township one hundred sixty north, range seventy-four west, a point on the fifteenth standard parallel; thence west along the fifteenth standard parallel to the southeast    corner of township one hundred sixty-one north, range seventy-four west; thence continuing north along the line between ranges seventy-three and seventy-four west to the international boundary line between the United States and Canada; thence west along the international boundary line to the line between ranges eighty-three and eighty-four west; thence south along the line between ranges eighty-three and eighty-four west to the southwest corner of township one hundred sixty-one north, range eighty-three west, a point on the fifteenth standard parallel; thence east along the fifteenth standard parallel to the northwest corner of township one hundred sixty north, range eighty-three west; thence continuing south along the line between ranges eighty-three and eighty-four west to the point of beginning.