Bonyunyu Dam

Reservoir Dams in Nyamira

Bonyunyu Dam: A Destination in Prospect

Situated in the southwest corner of Nyamira County, along B3 Sotik-Kisii Road in Gachuba Ward, the planned 35-ms high Bonyunyu Dam, crossing Gucha River, will be utilized primarily for water reservoir to benefit communities in Nyamira and Kisii counties. Work at Bonyunyu began in August 2018 and on completion, which will inevitably modify the native landscape, is also envisioned to amplify touring options in Nyamira as a recreation honeypot. With massive push-backs on the inception, on account of local demonstrations opposing its construction perceived as a steamrolled endeavor with unconvincing benefits, the omens are that Bonyunyu Dam may become for Nyamira what Mwihoti Dam is to Njoro in Nakuru County. Bonyunyu Dam is situated about 10 km north of Keumbu town.


Kenya has several reservoir dams that play a consequential roles in water supply, hydroelectric power generation, irrigation, flood control, and other water-related activities. The most famous of these are Seven Forks Dams along the Tana River. While reservoir dams are critical infrastructure projects that contribute to Kenya’s economic development, they are also visually stunning go-to destinations.


Touring Nyamira County offers a glimpse into the natural heritage of western Kenya, and cultural encounter with the charismatic Abagusii community. At Keroka, Otenyo Cultural Group Center offers insights into their traditions and customs. Generally speaking, Nyamira County is agrarian, typified by rolling hills.

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The maximum day and minimum night temperatures are normally between 28o C and about 10oC respectively, translating to an average temperature of 19 Degrees C.

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