Mound Septic Installation and Replacement in Chatfield, MN
Rochester Septic installs mound systems, replaces failed drainfields, and runs SSTS permitting in Chatfield, Minnesota. We are MPCA certified and insured, and we work the bluff-country parcels southeast of Rochester where septic is the only option and the rock is never far down.
Chatfield sits in the heart of the deep karst, on the line between Olmsted and Fillmore counties. This is bluff and sinkhole country, and the soil over the fractured dolomite and limestone is often thinner here than anywhere north of it. On a lot of these parcels the rock is only a foot or two down, which leaves nowhere near three feet of clean soil for a buried field. The fractures also move groundwater fast, so clean treatment above the rock is the barrier that protects the springs and sinkhole-fed streams this country is known for. A raised sand mound is the standard answer.
Nowhere is the soil evaluation more decisive than here. Depth to rock can change within a few feet, so we open the pit exactly where the treatment area will go and read the rock, the soil, and any sinkhole feature nearby before a single number is quoted. That reading decides whether a shallow system fits at all or whether the lot needs a full mound.
The county line matters for permitting. A Chatfield parcel on the north side is permitted by Olmsted County, while one on the south side falls to Fillmore County, and each is its own SSTS authority under Minnesota Rules 7080 and 7081. We confirm the line and file with the right county. Call (507) 555-0148 for a free estimate in Chatfield.