The Rajang River flows through the central region of Sarawak and the town of Sibu is an important commercial and financial centre. Timber logging & timber-related products industry and other agro-based industries are the main economic activities of the Rajang Basin.

Sibu is the main operations centre and lies on latitude 02° 24N and longtitude 116°56E. It is about 113km from the mouth of the Batang Rajang.

The general cargo-container berths can accommodate two ships each of 154m length. The deck loading specification is 672 lb/sq.ft for live stacking loads. Laden 20 ft. containers can be stacked two-high while laden 40 ft. containers can be stacked one-high on the 2 wharf deck. Storage facilities at Sibu Centre comprise four transit sheds, a dangerous goods shed, an open yard and a container yard.