According to the studies conducted on water supplying plans, the drinking water of central and eastern cities near Guilan province is provided by the large water-treatment plant in Rasht, the first phase of which with a capacity of 95,000,000 m/y and using Sefidroud River’s raw water is being operated. However, with consideration of the severe erosion of this river’s catchment basin which results in an increase in its sediment load, in addition to the fact that physical treatment of its water for drinking uses is not economical, particularly during operations and due to the existence of pollutants resulting from the wastes of industrial factories, fertilizers and pesticides used in the fields along Sefidroud River that contaminate it on one hand, and the existence of an guaranteed water resource of high quality at a proper distance from Rasht water treatment plant on the other, studies conducted on using the said river’s water led the consultant to recommend constructing Bijar City Storage dam across Zilaki River with the purpose of providing drinking water for 13 cities including Rasht, Khomam, Anzali, Siahkal, Lahijan, Langroud, Astaneh Ashrafieh, Kiashahr, etc. and villages located along transfer lines of these cities which began in 1990. However, due to limited credits, the process has been quite slow.

 

Type of dam: Clay Core Embankment

Height from the foundation: 94.5m

Crest length: 430m

Crest width: 10m

Body thickness at the floor: 434m

Total reservoir volume: 104,000,000m

Effective reservoir volume: 99,000,000 m 

Energy that can be generated in a year: 25 Gigawatt/hr