Stream Sediment, Float, and Bedrock Sampling in the Porcupine Mining Area, Southeast Alaska. Also, a sample collected in Little Boulder Creek contained 870 ppm zn, 400 ppm cu, and 100 ppm pb while a sample collected in Muncaster Creek contained 1,500 ppm cu, 360 ppm CO, Ppm au, and Ppm ag. NTIS Accession No.