Contraction Of Work Execution: Improvement Of Protection Services In The Ribera Of The Vulnerable Quebradas Before The Danger In The Sector Of The Cuerta De Cura, Del Aa. Hh El Nuevo Chaparral, Vista Alegre District Of The Provin - Contracting For The Execution Of Work: Improvement Of Protection Services In The Riverbank Of The Vulnerable Ravines In The Face Of Danger In The Sector Of The Cielo De Cura, The Aa Head. Hh The New Chaparral, Vista Alegre District Of The Province Of Nasca Of The Department Of Ica¿ With Cui N °