This Tsimshian rock trap complex is located on one of the islands near the mouth of the Skeena River. Like many others in the region, it may date back thousands of years. Not everything is known about how these traps functioned, but the following describes how this salmon trap at the mouth of a small stream was probably used. It is important to note that rock traps are designed to capture salmon only when the people fishing are present.

This estuary dries at low tide, leaving a freshwater stream meandering through the dry sand. Four dikes control stream-bound salmon movement by keeping the salmon in the drying estuary and eventually concentrating them in the stream and in drying pools behind the dikes. Two short fishing jetties along the stream give access to the fish with spear or dip net. There's also a mystery jetty. This is the lowest of four dikes controlling salmon movement into and out of the drying lagoon below the mouth of their natal stream. The estuary is completely dry, except for the freshwater stream and isolated pools. High tide gives salmon access to the estuary. Low tide forces them out into the larger inlet, unless fishers are at the dikes to harvest them.