even if you depend on your local construction industry ,you have to procure equipment , machinery , design, from other countries , you have to purchase all these things in dollars , cost is mostly affected by fuel oil which you will get only in dollars . big dam projects are very prone to cost overrun , sometimes they cross over up to 400 percent , if construction period escalates again it affects cost of the project .
but this is good step you people have taken the first step towards the journey .