The Port of Kuala Belait is one of the two ports of Brunei. The other port in Brunei is at the other end of the country at Muara. The part of the port near the mouth of the river is operated by Brunei Shell and public entry is restricted. The commercial port of Kuala Belait is located to the south of the municipality in Kg. Sungai Duhon and its environs further upriver from the mouth. Due to silting of the river mouth, the port can only take shallow draft vessels. Two breakwaters have been constructed at the mouth of the Belait River to reduce silting of the river mouth. However, regular dredging is required to keep the port in operation.