Tom Harrison, left, Connor DeLeon, center, and Jeremy Koch, all with Trautner Geotech, drill one of 50 holes Thursday on Main Avenue to determine subgrade conditions under the street. It is part of the initial engineering design phase for Downtown's Next Step project – which would redesign parts of Main Avenue – that requires extensive site analysis and surveying to paint the full picture of existing conditions. (Jerry McBride/Durango Herald)