The Río Tajamar in La Rioja, Argentina, is currently undergoing significant environmental and infrastructure work. The river is described as having a high level of degradation and scant use, primarily due to a lack of continuity in its flow. A major sanitation and flood control project, known as "El Vertedero," is underway and reported to be 90% complete. This project aims to create a reservoir to collect water that overflows during the summer season. The ongoing construction and the river's degraded state are critical considerations for paddlers, as they likely impact water quality, navigability, and overall access. For trip planning, it is essential to verify the completion status of these works and any resulting changes to the river's condition. The existence of fishing access points, boat ramps, and facilities for a day on the water is indicated, but their current operational status in light of the construction is unclear. The best season for any water-based activity appears to be the summer, when water levels rise, though this is also the period targeted for flood control. The overall character of the paddling experience is currently defined by these restoration efforts rather than by natural features or recreational appeal.