Presentation on theme: "Aaron VanderhillJim BarronJeff Van LaarTom Marshall."— Presentation transcript:
Aaron VanderhillJim BarronJeff Van LaarTom Marshall
Kayakers and Canoeists have shown interest Grand Rapids Whitewater Revitalization of Downtown Recreational course not only for experienced kayakers
Return the Grand River to a more natural state
Eliminate dangerous hydraulic at 4 th street dam Design entry and exit locations for kayakers
Increase entry and exit points Partial Replacement of dams Stair Step modification of the 4 th Street Dam Reasons ◦ Meets client’s needs ◦ Improves fish habitat ◦ Other alternatives not feasible Sediment behind 4 th Street Dam Would look unnatural Greater costs
Canal Street Park Fulton Street Fish Ladder Park Ford Museum
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 Accuracy ◦ Not taught in class ◦ Rocks & boulders as series of weirs ◦ California Department of Transportation
BeforeAfter Dam modification creates rapids
Completely remove and replace with boulders. Create two gaps for kayakers and boaters to pass through.
Remove section in middle of dam to allow kayakers to pass through. Add boulders to create natural appearance and rapids.
Completely remove the dam to eliminate flooding problems caused upstream by the stair step structure.
This dam will remain intact to maintain minimum water level during low flow seasons.
Total cost of $2,529,000 ◦ Site Planning: $67,000 ◦ Stair-step: $105,000 ◦ Downstream Dams:$1,774,000 ◦ Contingency (30%):$583,000
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
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