Tag: Pool 4
  • April

    Upper Mississippi River – Navigation and Ecosystem Sustainability Program (NESP) Systemic Mitigation Island 4 Project

    Sedimentation and sediment resuspension caused a loss in water depth diversity of the backwater lakes and isolated wetlands above Lake Pepin as well as a loss in aquatic vegetation. Concerns over habitat deficiencies in Upper Pool 4 include reduced habitat diversity and quality, lack of aquatic vegetation and invertebrates, and reduced abundance of fish and wildlife. The project includes construction of a peninsula to improve habitat conditions by reducing wind, waves, and redirecting sediment inflows. It also includes overwintering dredging to support a deep water habitat for fish and bank and shoreline stabilization to reduce inflows and erosion during high flow events.
  • Upper Mississippi River – Navigation and Ecosystem Sustainability Program (NESP) Wacouta Bay Project

    This is a NESP study partnership with the Wisconsin Department of Natural Resources (WIDNR), Minnesota Department of Natural Resources and the U.S. Army Corps of Engineers. The study will consider alternatives including island building and enhancement, forest enhancement and creation, backwater restoration and dredging, island and shoreline protection and beneficial use of dredged material.
  • Upper Mississippi River Restoration Program: Robinson Lake, Pool 4, Minnesota - Habitat Restoration

    The proposed project goal is to maintain, enhance, and create habitat suitable for native and desirable, aquatic and terrestrial plants and animals. The Robinson Lake area has lost bathymetric diversity, floodplain forest patch size, connectivity, and interior forest habitat over time. Island creation/enhancement and dredging would be the primary tools used to counter-act the losses. Increasing wild celery beds and perennial emergent vegetation would also be a goal within the lake to increase opportunities for migratory waterfowl. The project seeks to protect, enhance, restore, or create backwater and flowing channel habitats that provide diverse flow conditions and sediment dynamics that will benefit native fish (including migratory species) and mussel populations. The project seeks to protect and enhance diverse bottomland forest that will benefit migratory and resident birds and other species. The project also seeks to maintain or increase quantity and diversity of submerged, emergent, and rooted floating leaved vegetation.
  • Upper Mississippi River Restoration Project Big Lake, Pool 4, Wisconsin

    As with the much of the upper Mississippi River, sedimentation of backwater areas is an ongoing issue. The project area is greatly influenced by the input of sand from the Chippewa River that enters Pool 4 at about river mile 764. Other potential sources of sand are the historic channel maintenance dredging side-cast islands and the four active temporary placement sites within the study area. Big Lake has lost much of its island complex and bottomland forest to wind and wave erosion. The barrier islands between the lake and Catfish Slough have been degraded and/or eliminated over the past several years.