Located in the community of Ñacoca near the modern town of Santa Rosa, Kollin Pata is first occupied during the LF1. It eventually grew to be a significant Tiwanaku Period site. The site itself is located on the top of and on the North-facing slopes of a low natural rise above the lake. It lies to the North of the modern road. The site is intervisible with the other major LF and Tiwanaku Period sites in the Santa Rosa area: Kumi Kipa (T-272) and Sonaji (T-271).
The top of the natural hill on which the site is located seems to have been terraced, forming a large mound. This feature may or may not have been of ceremonial significance, and this issue will only be clarified by excavation.
Sector A extends over 3.50 ha and has a population index value of 186.