There is hereby created within the boundaries of Bonner County in the state of Idaho a wildlife preserve to be known as the David Thompson wildlife preserve, the boundaries of which are described as follows:   Commencing where the east and west 1/2 section line of section 1, township 56 north, range 1 east, Boise meridian, leaves Lake Pend Oreille at elevation 2,061 feet above sea level; thence east on said line until it crosses the east and west state highway; thence along said highway until said highway crosses the north and south 1/2 section line on Section 7, township 56 north, range 2 east, Boise meridian; thence south on said 1/2 section line through sections 7, 18 and 19 to where the line intersects the Clark Fork river; thence following the shoreline of said river to the shoreline of Lake Pend Oreille, thence at an elevation of 2,061 feet above sea level, along the shoreline of Lake Pend Oreille to the place of beginning.