Excavation contractors in Nobles County, MN

Minnesota's western and southern counties sit on the flattest agricultural land in the country: Glacial Lake Agassiz sediments in the Red River Valley and Des Moines Lobe till across the south. The profile is clay loam and silty clay over deep drift, with the Red River Valley's famous wet clays (Fargo, Bearden series) shrinking and swelling through every season: shrink-swell runs the highest averages in the Midwest here (4 percent of land, with localized smectite clays far worse), and foundation and utility work in the Valley is designed around seasonal movement and drainage. Hydric soils occupy 38 percent of the average county, prairie potholes and the Red River floodplain make dewatering and wet-weather access standard bid items, and median water tables sit 13 inches down. Digging itself is easy; the trade is trench collapse in wet clay, frost depth at 42 inches, and mound or at-grade septic systems wherever tight clay and shallow water meet.