In a panel peppered with audience interjections, Colorado Springs Mayor John Suthers and a School District 11 representative squared off Tuesday against high-profile anti-tax advocates on a pair of ballot measures soon coming to a vote. At issue were a set of stormwater fees proposed for the city and appearing as Issue 2A on El Paso County's November ballot and a $42 million mill levy override for District 11, which appears as Issue 3E. The stormwater fees would charge homeowners $5 and nonresidential property owners $30 a month for each acre they own.