With this floodgate called Sobongryongchon, a material and technological foundation was provided to increase grain production by supplying enough irrigation water to hundreds of hectares of tideland-turned rice-fields.

Attending its inaugural ceremony on August 11 were Jo Yong Su, secretary of the Nampho Municipal Committee of the Workers' Party of Korea, and officials and working people in the municipality and Onchon County.

Ho Yong Man, chairman of the Nampho Municipal Rural Economy Committee, made an inaugural address.