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Team 8: Grand River Rapids

Team 8: Grand River Rapids. Aaron Vanderhill. Jim Barron. Jeff Van Laar. Tom Marshall. Background. Kayakers and Canoeists have shown interest Grand Rapids Whitewater Revitalization of Downtown Recreational course not only for experienced kayakers. Project Overview.

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Team 8: Grand River Rapids

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  1. Team 8: Grand River Rapids Aaron Vanderhill Jim Barron Jeff Van Laar Tom Marshall

  2. Background • Kayakers and Canoeists have shown interest • Grand Rapids Whitewater • Revitalization of Downtown • Recreational course not only for experienced kayakers

  3. Project Overview • Return the Grand River to a more natural state

  4. Project Overview • Eliminate dangerous hydraulic at 4th street dam • Design entry and exit locations for kayakers

  5. Final Design • Increase entry and exit points • Partial Replacement of dams • Stair Step modification of the 4th Street Dam • Reasons • Meets client’s needs • Improves fish habitat • Other alternatives not feasible • Sediment behind 4th Street Dam • Would look unnatural • Greater costs

  6. Site Plan • Entry & Exit Points • Increase Usability • Safety

  7. Four Entry and Exit Points Fish Ladder Park Canal Street Park Fulton Street Ford Museum

  8. Project Location

  9. Modeling Decisions • Flow Rate • River used between April and November • Low flow = 1,700 cfs • Beautification dams • High flow = 50,000 cfs (100 year storm) • Legal issues • Design flow of 3,300 cfs

  10. Modeling Decisions • Modeling Accuracy • Not taught in class • Rocks & boulders as series of weirs • California Department of Transportation

  11. Stair Step Solution 4th Street Dam Safety Hazard

  12. Demonstration

  13. Downstream Modifications Before After • Dam modification creates rapids

  14. Dam #4 Completely remove and replace with boulders. Create two gaps for kayakers and boaters to pass through.

  15. Dam #3 Remove section in middle of dam to allow kayakers to pass through. Add boulders to create natural appearance and rapids.

  16. Dam #2 Completely remove the dam to eliminate flooding problems caused upstream by the stair step structure.

  17. Dam #1 This dam will remain intact to maintain minimum water level during low flow seasons.

  18. HEC-RAS Results: Low Flow

  19. HEC-RAS Results: Design Flow

  20. HEC-RAS Results: 100 Year Storm

  21. Cost • Total cost of $2,529,000 • Site Planning: $67,000 • Stair-step: $105,000 • Downstream Dams: $1,774,000 • Contingency (30%): $583,000

  22. Future of the Project • City of Grand Rapids has approved project idea • Turn our design over to GRWW • Raise the funds • Final Engineering design • Possible 100 year flood issues because of the stair step • Levee analysis • Easements

  23. Acknowledgments • Claire Schwartz – Industrial Consultant, FTC&H • Chip Richards, Chris Muller (GRWW) • Wendy Ogilvie, FTC&H • Professor De Rooy - Team Advisor • Steve Elliot, Jason VanderKodde, Steve Waalkes, CEAC Reviewers

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