CONSTRUCTORA SANDRA WALESKA RIVERA ABARZUA SPA: public contracts won without a rival in Chile: 4 uncontested awards; 25% of its awards; 1 without a competition; 3 single bid.
Assay record ASY-CL-0MSE8OW1NM · Cite as: Assay Systems, “CONSTRUCTORA SANDRA WALESKA RIVERA ABARZUA SPA: public contracts won without a rival in Chile”, https://assay-systems.com/register/cl/uncontested/s/constructora-sandra-waleska-rivera-abarzua-spa/
CONSTRUCTORA SANDRA WALESKA RIVERA ABARZUA SPA won 4 of its 16 public contract awards in Chile without a rival from 2024-08-28 to 2026-04-24: 1 without a competition and 3 after a competition that drew a single bid. 2 buyers awarded it without a rival, the largest I MUNICIPALIDAD DE VILLARRICA with 3.
An award is uncontested when the buyer had no rival offer to weigh: it was made without a competition (direct award, negotiated procedure without a call for tenders, sole-source or advance-notice contract), or a competition was held and only one bid arrived. Every count below is built award by award from the official notices. Awards to individuals are not included.
I MUNICIPALIDAD DE VILLARRICA gave CONSTRUCTORA SANDRA WALESKA RIVERA ABARZUA SPA 6 awards: 1 without a competition, 2 after a competition with a single bid. First 2024-08-28, latest 2026-03-25.
I MUNICIPALIDAD DE LONCOCHE gave CONSTRUCTORA SANDRA WALESKA RIVERA ABARZUA SPA 3 awards: 0 without a competition, 1 after a competition with a single bid. First 2025-08-28, latest 2026-04-24.
| Date | Buyer | How | Stated reason |
|---|---|---|---|
| 2026-04-01 | I MUNICIPALIDAD DE LONCOCHE CL-9643289 | Single bid Licitación Pública Entre 100 y 1000 UTM (LE) | — |
| 2025-01-31 | DOM CL-9467110 | Single bid Licitación Pública Entre 100 y 1000 UTM (LE) | — |
| 2025-01-31 | I MUNICIPALIDAD DE VILLARRICA CL-52117896 | No competition direct | — |
| 2024-08-28 | I MUNICIPALIDAD DE VILLARRICA CL-9395418 | Single bid Licitación Pública Entre 100 y 1000 UTM (LE) | — |
Every uncontested award in Chile · All countries · CONSTRUCTORA SANDRA WALESKA RIVERA ABARZUA SPA in the register
Source: ChileCompra / Mercado Público open data (purchase orders and tenders). Awards are matched to their buyer and supplier as published. Values in these notices often state a framework ceiling rather than a contract amount, so awards are counted, not summed. Updated 17 October 2026.