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Team 8: Grand River Rapids
Aaron Vanderhill Jim Barron Jeff Van Laar Tom Marshall
Kayakers and Canoeists have shown interest
Grand Rapids Whitewater
Revitalization of Downtown
Recreational course not only for experienced
kayakers
Background
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
Project Overview
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
Final Design
Entry & Exit Points
Increase Usability
Safety
Site Plan
Four Entry and Exit Points
Canal Street Park
Fulton Street
Fish Ladder Park
Ford Museum
Project Location
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
Modeling Decisions
Stair Step Solution
Safety Hazard
4th Street Dam
Demonstration
Downstream ModificationsBefore After
•Dam modification creates rapids
Dam #4Completely remove and replace with boulders. Create two gaps for kayakers and boaters to pass through.
Dam #3Remove section in middle of dam to allow kayakers to pass through. Add boulders to create natural appearance and rapids.
Dam #2Completely remove the dam to eliminate flooding problems caused upstream by the stair step structure.
Dam #1This dam will remain intact to maintain minimum water level during low flow seasons.
HEC-RAS Results: Low Flow
16750 17250 17750 18250 18750 19250 19750 20250 20750 21250 21750585
590
595
600
605
610
615
620
Low Flow Water Surface Elevation (1,700 cfs)
CurrentModifiedWest LeveeEast Levee
River Station
Wate
r Surf
ace E
levati
on (
ft)
HEC-RAS Results: Design Flow
16750 17250 17750 18250 18750 19250 19750 20250 20750 21250 21750585
590
595
600
605
610
615
620
Design Flow Water Surface Elevation (3,300 cfs)
CurrentModifiedWest LeveeEast Levee
River Station
Wate
r Surf
ace E
levati
on (
ft)
HEC-RAS Results: 100 Year Storm
16750 17250 17750 18250 18750 19250 19750 20250 20750 21250 21750611
612
613
614
615
616
617
618
619
100 yr Water Surface Elevation (50,000 cfs)
CurrentModifiedWest LeveeEast Levee
River Station
Wate
r Surf
ace E
levati
on (
ft)
Total cost of $2,529,000
◦ Site Planning: $67,000◦ Stair-step: $105,000◦ Downstream Dams: $1,774,000◦ Contingency (30%): $583,000
Cost
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
Future of the Project
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
Acknowledgments
