I have read your article, “Nyanza garbage site to shut down within 3yrs” with interest. As a point of information, as the author indicated, it is not WAT who have invested in solar power in Rwanda but Stadtwerke Mainz AG.
Mainz (not Maine as written) is the capital of Rhineland-Palatinate, the "Jumelage Rhenanie-Palatinate" state (one of the 16 German federal states).
Stadtwerke Mainz AG (roughly meaning "the utility company of Mainz S.A.") have an agency in Rwanda and are running the largest grid tied solar power plant in Africa, on Mont Jali, since 2007.
Do you remember, Electrogaz had to "shed power" in 2004/5/6, meaning, they had to turn off parts of the country's power supply Kigali inclusive, because of minimal water to drive the hydro power plants, when a drought hit Eastern Africa at the time? That's why that solar power plant was designed and set up in a bid to help tackle that problem.
It was also Stadtwerke Mainz AG, not WAT, who have shown interest in tackling the negative environment impacts of the Nyanza dumpsite. We together with the State Government of Rhineland-Palatinate, have co-financed exploratory drillings at the Nyanza site and contracted WAT, a German company, for the job.
WAT in turn hired a Rwandan company to carry out the civil works. That was about six months ago. I believe people got this wrong at the time as well.
Stadtwerke Mainz AG