ArkNavReport_TOC_Acronyms_ExecSummary.doc

Key features and assumptions of alternative a are

Info icon This preview shows pages 24–26. Sign up to view the full content.

View Full Document Right Arrow Icon
current approved 1974 O&M plan are proposed, Alternative A is titled and considered the “no action alternative.” Key features and assumptions of Alternative A are: Maintenance of the 9-ft channel by dredging would continue throughout the MKARNS. There would be no change in reservoir releases or channel deepening. Dredge materials would be disposed in existing designated dredge material disposal sites. Upland dredge material disposal sites in Oklahoma and in-river sites in Arkansas would be extended in accordance with the approved 1974 O&M plan, and supplementing the Operations and Maintenance EIS. Modifications incidental to dredging operations of existing wing dikes, revetments, etc., would continue. Only measures within current authority and established practices would be considered. Alternative B – Navigation Channel Maintenance. Alternative B includes consideration of all the measures included in Alternative A, except that it assumes that in-river disposal of dredge materials would be allowed in Oklahoma. Unused upland dredge material disposal sites, approved in the 1974 O&M plan, would not be utilized and the need to mitigate adverse effects to these now valuable sites would be avoided. Alternative B assumes that essentially all future disposal in Oklahoma would be in-river, in currently used terrestrial sites, or in newly identified terrestrial sites of low habitat value. Future disposal in Arkansas would continue to be instream except on the White River Entrance Channel where terrestrial sites are, and would continue to be utilized. Due to the higher expected mitigation costs and other environmental impacts of Alternative A, Alternative B is more likely to occur. Given this, Alternative B is the plan against which Alternatives C, D, and E, are compared economically. Key features and assumptions of Alternative B are: Maintenance of the 9 ft channel by dredging would continue throughout the system. There would be no change in reservoir releases or channel deepening. Dredge materials would be disposed in existing designated dredge material disposal sites to the extent practicable, consistent with current statutes, regulations, and policies. Upland dredge material disposal sites in Oklahoma and Arkansas would be extended or added by amending the approved 1974 O&M plan, and supplementing the Operation and Maintenance EIS. Modifications incidental to dredging operations of existing wing dikes, revetments, etc. would continue. Measures within current authority and established practices would be considered, and in-river disposal of dredge materials would be allowed in both Oklahoma and Arkansas. xxiv
Image of page 24

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Alternative C - Navigation Channel Maintenance and Operations Only Flow Management. Alternative C consists of adding new dredged material disposal sites in Oklahoma to further supplement disposal site capacity as described in Alternative B, which will reach capacity at some locations in the near future and replacing the existing flow management plan with the Operations Only Flow Management Plan. The existing depth of the navigation channel would remain unchanged.
Image of page 25
Image of page 26
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern