INFORMATION FROM THE DAWSON COUNTY ASSESSOR LEXINGTON - Perhaps the most important time of year is approaching for property owners in Dawson County. Assessor John Moore said this week that his office is busy now compiling information for the annual valuation change notices, scheduled to arrive by mail June 1. This marks the opportunity for property owners ...PLEASE LOG IN FOR PREMIUM CONTENT. Our website requires visitors to log in to view the best local news. Not yet a subscriber? Subscribe today!