(Olympia, WA)  --  Washington's chief economist says the state is expected to collect about 570-million dollars more over the next two years than originally anticipated.  Steve Lerch delivered the news yesterday to the Economic and Revenue Forecast Council, citing factors such as consumer confidence, as well as growth in the state's economy and population.  Lerch says when these and other factors are figured in, economists think the state will have an additional 258-million dollars for the biennium that ends June 30th, and about 313-million more for the two-year fiscal period that begins July 1st.