The Kibirigwi Kiangai washing station was created in 1953, at the same time the group of farmers in the area decided to establish the Kibirigwi Farmers Cooperative Society.Currently, Kibirigwi Coop is affiliated with the Kyrinyaga County Coop Union and operates eight stations in total.
Once the farmers take the cherries to the washing station, they are classified and floated in water to separate the cherries that are not at the right point of maturity. The coffee is then pulped and fermented overnight before being washed and classified. The water used to process the coffee comes from the Kibirigwi river, which is 50 meters from the station. The drying process is done on drying tables for 8-14 days.
In order to educate its members on good agricultural practices, the cooperative has employed an agronomist to educate farmers in one to one and group sessions. These formations are carried out in the field during harvest and in the off-season.
The cooperative also produces and distributes more than 200,000 seedlings each year among their members to promote crop regeneration. They also distribute manure to promote organic fertilization techniques. In the washing station all the fermentation tanks and washing channels have been recently tiled to improve the overall quality of the coffees and the cleaning and maintenance of the facilities.