There are now three constructed wetlands in the LCRA service area near Lake Travis. One system, which was designed by Robert Morris of Cedar Park, utilizes a septic tank and pump tank near the side of a house. Treated effluents are pumped into a cell of canna lilies and then flow to a wetland cell planted with horsetails. Each is these two wetlands cells measures 70' long, 4' wide and 2' deep. The cells are lined with 30 mil plastic to prevent leakage.
Water is maintained at a constant level within each cell.
After leaving the second cell, the effluent enters a pump tank. Effluents are disposed of in a low-pressure dosing field. The system is very attractive to look at, has not suffered from odor and insect problems, and provides excellent treatment. Because of our experiences here, we now recommend that brickwork or concrete be used to support elevated cells. Otherwise, it's worked great.