1 Concrete Leveling Contractors in Nebraska City, Nebraska

If you need concrete leveling in Nebraska City, the usual culprits are extraordinarily deep Peoria Loess that collapses when it saturates (among the thickest anywhere in North America) with Marshall-Monona loess-derived silt-loam subgrades, Ida-Hamburg-Knox steep-bluff-face subgrade with active hillslope creep and documented landslide hazard on the steeper bluff parcels, Pawnee till clays with shrink-swell behavior on bluff-erosion parcels where till is exposed, Onawa-Albaton expansive-clay subgrade on Missouri River floodplain parcels with documented shrink-swell, and Missouri River channel-migration history with the historic frontier-river-port heritage parcels. Nebraska City is the seat of Otoe County, southeast Nebraska, sitting along US-75 and US-73 on the eastern edge of Otoe County, bordered by the Missouri River and the State of Iowa to the east. The community traces its origin to Oto Indian habitation, with the Lewis and Clark Expedition visiting the site in 1804. In 1854 Otoe County was created with the passage of the Kansas-Nebraska Act, and the community of Table Creek became the county seat, changing its name to Nebraska City on March 4 of that year. The Nebraska State Legislature has credited Nebraska City as the oldest incorporated city in the state. J. Sterling Morton, a political proponent of tree-planting, founded Arbor Day here in 1872 (now a national observance); Morton's 52-room mansion built in 1879 to resemble the White House was converted in 1923 into Arbor Lodge State Historical Park and Arboretum, the city's defining heritage attraction. Nebraska City sits on the loess-mantled bluff terrain west of the Missouri River, with the bluffs reaching some of the highest loess thicknesses anywhere in North America (locally over 200 feet of accumulated loess on the bluff crest). Bedrock is principally Pennsylvanian limestone and shale of the Wabaunsee Group (with the Stotler Limestone, Pillsbury Shale, Zeandale Limestone, and other named beds exposed in regional cuts), with deeper Council Grove Group strata underlying. Above bedrock, Late Pleistocene Peoria Loess (locally extraordinarily thick on the Missouri River bluffs) and underlying Loveland Loess overlying pre-Illinoian glacial till mantle the uplands, with Quaternary Missouri River alluvium (sand, silt, clay 50 to 150 feet deep) flooring the valley. Local soils include Marshall silty clay loam on the loess uplands, Monona silt loam on the loess uplands, Ida silt loam on the steeply eroded loess sideslopes, Hamburg silt loam on the steep bluff faces (severe erosion hazard), Knox silt loam on the steep loess bluffs, Pawnee clay loam on the till uplands where bluff erosion has exposed underlying till, Onawa silty clay on the alluvial flats (expansive clay), Albaton silty clay on the alluvial bottoms (expansive clay), Haynie silt loam on the alluvial flats, and silty alluvium along the Missouri River corridor. Between extraordinarily deep Peoria Loess that collapses when it saturates (among the thickest anywhere in North America) with Marshall-Monona loess-derived silt-loam subgrades, Ida-Hamburg-Knox steep-bluff-face subgrade with active hillslope creep and documented landslide hazard on the steeper bluff parcels, Pawnee till clays with shrink-swell behavior on bluff-erosion parcels where till is exposed, Onawa-Albaton expansive-clay subgrade on Missouri River floodplain parcels with documented shrink-swell, and Missouri River channel-migration history with the historic frontier-river-port heritage parcels, subgrade behavior is the primary driver of slab movement here.