The hydro dam cost consists of the costs of the following elements:
It has been assumed that the existing 8.1 GW will always be used. Renovations, dams height increases and new plants will contribute to increase electricity production from hydro dam in 900 GWh/year by 2050. This value do not include the electricity production reduction due to the effect of LEaux. The following table decomposses the electricity production increase. It has been created with the information from PROGNOS(2012) and OFEN(2012).
|Electricity production increase potential (2050 compared to 2011) [GWh]|
|Dam height increase||330|
The use () of the above listed potentials depends on the hydro dam slider as in the following equation,
where is the one of the electricity production increase potentials and is the Hydro dam slider value that is defined between 8.1 and 8.2 GW.
The extra capacity related to renovation is calculated from the electricity production increase, assuming a capacity factor of 0.244. Its specific investment cost is 3'239 CHF/kWe . No O&M cost is considered as this cost is already accounted in the existing facilities.
The fact on increasing the height of the dams has two effects:
The extra capacity related to new plants is calculated from the electricity production increase, assuming a capacity factor of 0.244.
 A. Schleiss (2012), Talsperrenerhöhungen in der Schweiz: energiewirtschaftliche Bedeutung und Randbedingungen.