Petersburg Management Area: the area consists of that portion of Unit 3, Mitkof Island, north and west of a line from Frederick Point to the highest point in Section 8, T59S, R90E; to the highest point in Section 7, T59S, R80E; to the highest point in Section 13, T59S, R79E; to the highest point in Section 23,T59S, R79E; then due south to 56° 43' 24" N; at least one-quarter mile from any airport property, dwellings, businesses, highways, roads or streets within the corporate city limits