As it runs across the Gusii Land part of it becomes the Mogonga River, known for its deadly effects when it floods.

Mogonga and Gucha are almost equal in size and they meet just 1 mile before flowing through the Ogembo Town center.

[1] About 45 km from Migori, the Gogo Falls dam was completed in 1956 with a hydropower capacity of 2MW, connected to the Kenyan national grid.

[3] In 2014, Kenyan government announced an upgrade to the dam, to increase capacity to 12MW, regulate flow to prevent flooding, and allow irrigation of approximately 25,000ha.

[4] As of February 2016, the Orango irrigation intake and canals have been built downstream of the dam for the use of Okenge and Owiro farmers in Migori County, but construction of distributary channels have been delayed.