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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 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 • Return the Grand River to a more natural state
Project Overview • Eliminate dangerous hydraulic at 4th street dam • Design entry and exit locations for kayakers
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
Site Plan • Entry & Exit Points • Increase Usability • Safety
Four Entry and Exit Points Fish Ladder Park Canal Street Park Fulton Street Ford Museum
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
Modeling Decisions • Modeling Accuracy • Not taught in class • Rocks & boulders as series of weirs • California Department of Transportation
Stair Step Solution 4th Street Dam Safety Hazard
Downstream Modifications Before After • Dam modification creates rapids
Dam #4 Completely remove and replace with boulders. Create two gaps for kayakers and boaters to pass through.
Dam #3 Remove section in middle of dam to allow kayakers to pass through. Add boulders to create natural appearance and rapids.
Dam #2 Completely remove the dam to eliminate flooding problems caused upstream by the stair step structure.
Dam #1 This dam will remain intact to maintain minimum water level during low flow seasons.
Cost • Total cost of $2,529,000 • Site Planning: $67,000 • Stair-step: $105,000 • Downstream Dams: $1,774,000 • Contingency (30%): $583,000
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
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