Parks crew lowers creek to control milfoil as cold front nears

City employees, from left, Abel Palacio, Rodney Kepler and Dave Paddie open a floodgate and move debris off a dam on Sulphur Creek on Monday. To freeze milfoil -- an invasive aquatic plant -- the city parks department is lowering the creek in W.M. Brook Park before a strong cold front. Temperatures are expected to drop through the week, with highs this weekend in the upper 30s or 40s and lows in…