Several counties with heavy oil and gas development helped deliver the death-blow Tuesday to Proposition 112, the voter initiative that would have drastically increased drilling setbacks from homes, businesses and waterways to 2,500 feet. Related Articles Q & A: Gov.-elect Jared Polis, after Prop 112 defeat, talks drilling setbacks Colorado governor election map: See how Jared Polis and Walker Stapleton performed in each county The industry spent more than $30 million to defeat Prop 112 in the election.