The Lower Ewaso Ngiro South River Multipurpose project is a long term Vision 2030 project initiated during the MTP II through to MTP III whose main objective is to accelerate the rate of National Economic growth. The Kenya Vision 2030 is the overarching roadmap in transforming Kenya into a middle-income nation providing high quality of life to all its citizens by the year 2030 in a clean and secure environment. The project is also in line with the “Big Four” initiatives of enhancing Food and Nutrition Security (FNS) through development of irrigated agriculture (2,400Ha) and enhancing manufacturing through hydropower development (180MW).

Ewaso Ngiro South River Multipurpose Dam Development Project was first identified through a feasibility study carried out in 1992 by Knight Piesold which included a well founded proposal of development of Hydro power scheme based on a water transfer from Amala river and three cascade dams with their related hydropower plants. The project will comprise of the following components;

  • A water transfer from the Amala River to Ewaso Ngiro South River (Max - 6m3/s, Min – 2.5m3/s, ecological flows – 0.3-2.0m3/s)
  • A cascade hydropower generation system, which shall include;
  • Oletukat/ Olenkuluo dam and hydropower plant – 140m height, 300hm3, 25MW
  • Leshota dam and hydropower plant – 57m height, 30hm3, 56MW
  • Oldorko dam and hydropower plant – 20m height, 13hm3, 99MW
  • Demodulation and sub-regulation reservoir
  • Irrigation scheme – 4,400Ha (Phase I -2,400ha, Phase II- 2,000 Ha)
  • Water supply scheme for 350,000 equivalent inhabitants
  • Eco-tourism and Fisheries development

Project area

Project area

Main Project Components

Main Project Components

  • Development of the Maasai Mau Strategic Management Plan.
  • Maasai Mau catchment area rehabilitation and protection.
  • Establishment of community conservation cooperatives.
  • Support community alternative source of livelihoodsd
  • Promotion of green energy.
  • 3 Cascaded Dams Hydropower schemes include;
    • Oletukat Olenkuluo scheme; Height - 140m, Vol -300Hm3, P- 24MW, Design head - 98m
    • Leshota scheme; Height - 57m, Vol -30Hm3, P- 54MW, Design head - 217m
    • Oldorko scheme; Height - 30m, Vol -15Hm3, P- 96MW, Design head – 385m
  • Irrigation of 4,500Ha
  • Community Water Supply
  • Environmental Conservation
  • Fisheries and Eco-tourism development
  • Amala transfer scheme.
Project Impacts / Benefits

Project Impacts / Benefits

  • Hydropower Production 300 GWh (at drought years) to 1,050 GWh per year (at wet years) – This is estimated to generate 180MW
  • Water Supply - 355,656 equivalent inhabitants
  • Irrigation - 4,400 ha of a New Agricultural Area,
  • Tourism Development - One Eco-Lodge and two Tented Camps (Tented Bush Eco-camp and Tented Camp and Maasai Cultural Centre). Water sports facilities in the reservoir areas and pre-established walking routes.
  • Fisheries About 70 Tons/year fish production
  • Roads 175 Km of new roads.
  • Social improvements - 82 Primary Schools(17,000 children) will improve their availability of water by Roof Water Harvesting measures10,600 dispersed persons will improve the water availability for themselves and their livestock by means of 100 new rainfed water ponds
  • Generation of New Forest Areas - 2,350 ha of Reforestation of the Mau Forest Complex
  • 306 Km of a 46m wide strip of Riparian Reforestations of the Ewaso Ng’iro South River and of the Amala-Mara Rivers.