Contracting For The Execution Of The Work; Improvement And Creation Of The Irrigation Channel And Reservoirs In 9 Localities Of The District Of Yanama - Province Of Yungay - Department Of Ancash - Contracting For The Execution Of The Work: Improvement And Creation Of The Irrigation Channel And Reservoirs In 9 Localities Of The District Of Yanama - Province Of Yungay - Ancash Department