| Environmental assessment Warrenville Grove Dam modification, Warrenville, Illinois - :2612 | National Environmental Policy Act (NEPA) | National Ocean Service (NOS)
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Environmental assessment Warrenville Grove Dam modification, Warrenville, Illinois
  • Published Date:
    2011
Filetype[PDF - 5.87 MB]


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Environmental assessment Warrenville Grove Dam modification, Warrenville, Illinois
Details:
  • Corporate Authors:
    United States, National Ocean Service., Office of Response and Restoration ; DuPage County (Ill.), Stormwater Management Division, ; DuPage County Forest Preserve District (Ill.), Board of Commissioners, ; ... More ▼
  • Description:
    "This project is a component of the proposed ecological enhancement of a portion of the West Branch DuPage River, in accordance with National Oceanic and Atmospheric Administration (NOAA) Grant Award No. FNA07NOS4630002, DuPage River Restoration. The Environmental Assessment (EA) was prepared under the requirements of the National Environmental Policy Act (NEPA) (42 USC 432 1 et seq.) to consider and disclose any potential significant impacts to the quality of the human environment that may arise from the proposed modification of the Warrenville Grove Dam along the West Branch DuPage River, Warrenville, DuPage County, Illinois. The overall goal of this project is to restore the ecological health of an impounded segment of the West Branch DuPage River. The preferred alternative - dam removal - would largely remove the Warrenville Grove Dam and would allow for re-creation of upstream channel conditions, thereby: Restoring the natural ecological functions and processes of a freeflowing river segment, Decreasing lake-like conditions upstream of the dam that support high algal biomass, high water temperatures, and intermittent substandard dissolved oxygen levels, Decreasing barriers to fish migration and mussel dispersion, Decreasing maintenance needs and costs of the dam, Improving public safety, Providing improved educational and recreational opportunities tor the community, Improving the Qualitative Habitat Evaluation Index scores and functional aquatic habitat, and Improving sediment transport within the river. The preferred alternative was created through input from the Forest Preserve District of DuPage County (the landowner), the public, NOAA and other federal agencies. The project, as proposed, would not result in significant adverse environmental impacts. Short-term, temporary, and localized construction-related impacts to air quality and increases in noise from the use of construction equipment are anticipated. However, over the long-term, the proposed project is anticipated to markedly improve aquatic habitat, improve water quality, enhance the area's natural resources, and improve the public use and enjoyment of the area"--Cover letter; Portfolio comprised of 3 related PDF documents digitized and organized by: NOAA Office of Program Planning and Integration (PPI) National Environmental Policy Act (NEPA) staff.

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