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Title: Final Environmental Assessment : Grand Prairie Area Demonstration Project, Post General Reevaluation Design Changes
Authors: United States. Army. Corps of Engineers. Memphis District.
Keywords: Grand Prairie (Ark.)
Flood control
Environmental management
Environmental protection
Publisher: United States. Army. Corps of Engineers. Memphis District.
Abstract: The Grand Prairie Area Demonstration Project (GPADP) is located in eastern Arkansas and includes significant portions of Arkansas and Prairie counties and small portions of Monroe and Lonoke counties. The GPADP provides agricultural water supply, water conservation, aquifer protection, waterfowl management, and prairie grass restoration. A general reevaluation report and final environmental impact statement EIS were prepared by the U.S. Army Corps of Engineers, Memphis District, and circulated for public review in December 1999. The record of decision was signed in February 2000. These documents can be viewed on the GPADP web site at The selected plan as presented in the GRR and EIS would include a 1,640-cubic feet per second (cfs) pumping station to divert excess surface water from the White River to the 362,662-acre project area, 8,849 acres of new on-farm irrigation reservoirs, on-farm tail water recovery systems, establishment of native prairie vegetation on approximately 3,000 acres of canal rights-of-way, and the annual flooding of 38,529 acres of harvested rice fields for waterfowl. In addition to the pumping station, the project delivery system would incorporate 184 miles of new canals, 177 miles of pipelines, and the use of approximately 291 miles of existing streams and channels. One hundred twenty weirs would be constructed in existing streams, and numerous other hydraulic structures (e.g., gated check structures, wasteways, culverts, siphons, turnouts) would be constructed in association with the water delivery system. During detailed design of the project, it became obvious that modifications to the project (as presented in the GRR and EIS) would increase project efficiency and flexibility, resolve landowner disputes, and/or reduce project costs. The project team continually reexamines the project for possible improvements. Additional information was gathered through coordination with landowners, surveys and borings, detailed design of the delivery system, and field investigations. This information verified the capability of the project to achieve stated goals and also provided opportunities to refine the original design. All proposed changes were coordinated with an inter-agency environmental team. It is important to note that this environmental assessment covers all project changes to date. Detailed designs for project construction items are at various stages of development. No significant changes to the project, in addition to those disclosed in this EA, are anticipated. However, the project will continually be reviewed in order to ensure compliance with the National Environmental Policy Act.
Description: Environmental Assessment
Rights: Approved for Public Release; Distribution is Unlimited
Size: 38 pages / 1.38 MB
Types of Materials: PDF/A
Appears in Collections:Environmental Documents

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