CONTRACTING OF THE ACTIVITY EXECUTION SERVICE: MAINTENANCE OF THE METALLIC PERIMETER FENCES OF THE THREE RESERVOIRS OF THE TOWN OF SAN JUAN, PONTO DISTRICT - HUARI PROVINCE - ANCASH DEPARTMENT - CONTRACTING OF THE ACTIVITY EXECUTION SERVICE: "MAINTENANCE OF THE METALLIC PERIMETER FENCES OF THE THREE RESERVOIRS OF THE TOWN OF SAN JUAN, DISTRICT OF PONTO - PROVINCE OF HUARI - DEPARTMENT OF ANCASH" (EXPIRED)