Dawson County is voting on extending the 1-cent special purpose local option sales tax in the Nov. 4 election, and the local chamber is getting behind it. If approved, projections show the tax could generate an estimated $45.3 million over six years to be split at a ratio of 85 percent to the county and 15 percent for Dawsonville projects. Proponents of the extension say as much as 85 percent of the tax money collected locally would come from visitors shopping in Dawson.