Sweet fish in the Chongchon River, famous for rich nutrients and good taste, has great economic effectiveness for its speedy growth.

Scientists in the Branch Academy of Hydraulic and Marine Sciences under the State Academy of Sciences settled scientific and technological problems arising in confirming fish-ways through the dams to suit the ecological conditions of fishes including sweet fish.

The members of the South Hamgyong Provincial Brigade in charge of building Huichon Power Station No. 11 eliminated the aftermath of the last year's flood in a short period and finished the construction of a fish-way in just about 20 days.

The brigades of South Hwanghae Province, North Phyongan Province and Pyongyang City are pushing forward with the excavation of the base and concrete tamping for the creation of fish-ways in Huichon Power Stations Nos. 5, 6 and 9.

The builders of Kumyagang and Thaechon Hydroelectric Power Station Construction Companies have carried out their fish-way projects in quality.