Major tasks of ports and piers are:
- passenger and cargo fleet service, stream of supply service;
- lading/discharge of timber cargo, coal, mineral-constructional materials;
- coal trans-shipment from railway;
- logging and building materials transportation;
- extraction of mineral-constructional materials.
«Eastern-Siberian Inland Navigation Company» has such branch offices:
- Irkutsk river port (Irkutsk);
- Irkutsk fleet repairing base (Irkutsk);
- Usolye fleet repairing base (Usolye-Sibirskoye);
- Svirsk river port (Svirsk);
- Bratsk river port (Bratsk);
- Port «Baikal» (Listvyanka);
- Pier Kultuk (Kultuk);
- Pier Ust-Bargusin (Ust-Bargusin);
- Pier Nizhneangarsk (Nizhneangarsk).