1
Copyright © 2012 Merrick & Company - All rights reserved.
Confluence Park, Denver CO
Looking Back at the Safety-Related ...
2
Copyright © 2012 Merrick & Company - All rights reserved.
Safety
3
Copyright © 2012 Merrick & Company - All rights reserved.
Safety
4
Copyright © 2012 Merrick & Company - All rights reserved.
Safety
5
Copyright © 2012 Merrick & Company - All rights reserved.
Safety
Union Avenue Boat Chutes, Sheridan, CO
One of the Most
...
6
Copyright © 2012 Merrick & Company - All rights reserved.
Initial Conclusion
 Is yours the same as a nationally recogni...
7
Copyright © 2012 Merrick & Company - All rights reserved.
Presentation Outline
Confluence Park Safety
Performance
Safe...
8
Copyright © 2012 Merrick & Company - All rights reserved.
Confluence Park Safety Record
 No known fatalities or serious...
9
Copyright © 2012 Merrick & Company - All rights reserved.
10
Copyright © 2012 Merrick & Company - All rights reserved.
Presentation Outline
Confluence Park Safety
Performance
Saf...
11
Copyright © 2012 Merrick & Company - All rights reserved.
Design Criteria for Recreation Structures
http://www.udfcd.or...
12
Copyright © 2012 Merrick & Company - All rights reserved.
Emphases of Existing UDFCD Manual
 Avoidance of Overly Reten...
13
Copyright © 2012 Merrick & Company - All rights reserved.
Emphases of Existing UDFCD Manual
Overly Retentive Hydraulics
14
Copyright © 2012 Merrick & Company - All rights reserved.
Emphasis of Existing Manual
Signage/Barriers
Wide Ties and Po...
15
Copyright © 2012 Merrick & Company - All rights reserved.
Emphasis of Existing Manual
Signage/Barriers
No Standardized
...
16
Copyright © 2012 Merrick & Company - All rights reserved.
Other Recommendations in Existing Manual
Confluence Park Desi...
17
Copyright © 2012 Merrick & Company - All rights reserved.
 Use a Froude number, Fr, less than 1.5 at the toe of the
dr...
18
Copyright © 2012 Merrick & Company - All rights reserved.
Emphasis of Existing Manual
Summary:
 Criteria and suggestio...
19
Copyright © 2012 Merrick & Company - All rights reserved.
Updates
Additional “Suggestions”
Global Objectives:
20
Copyright © 2012 Merrick & Company - All rights reserved.
Proposed Updates
Additional “Suggestions”
Two-Dimensional Mod...
21
Copyright © 2012 Merrick & Company - All rights reserved.
Proposed Updates
Additional “Suggestions”
Summary of Other Su...
22
Copyright © 2012 Merrick & Company - All rights reserved.
Proposed Engineering Related Criteria
Obvious?
23
Copyright © 2012 Merrick & Company - All rights reserved.
Safety is More Challenging than Ever
Aesthetics & Permitting
...
24
Copyright © 2012 Merrick & Company - All rights reserved.
Photos: USBR
Multiple Slot Baffled
Safety is More Challenging...
25
Copyright © 2012 Merrick & Company - All rights reserved.
Safety is More Challenging than Ever
Diversion and Floodplain...
26
Copyright © 2012 Merrick & Company - All rights reserved.
Safety is More Challenging than Ever
Accommodating a Wide Ran...
27
Copyright © 2012 Merrick & Company - All rights reserved.
Safety is More Challenging than Ever
Limited Budgets
28
Copyright © 2012 Merrick & Company - All rights reserved.
Presentation Outline
Confluence Park Safety
Performance
Saf...
29
Copyright © 2012 Merrick & Company - All rights reserved.
Safety Features of Confluence Park
30
Copyright © 2012 Merrick & Company - All rights reserved.
Man-Made Jetty
Design: Durable Construction Techniques
31
Copyright © 2012 Merrick & Company - All rights reserved.
Thank You
Richard McLaughlin, PE
McLaughlin Whitewater Design...
Upcoming SlideShare
Loading in …5
×

Confluence Park - Safety-Related Success of the First Designed In-River US Whitewater Park - Rick McLaughlin, P.E., McLaughlin Whitewater Design Group, a division of Merrick & Company

231 views

Published on


Confluence Park – Looking Back at the Safety-Related Success of the First Designed In-River Whitewater Park in the U.S.


The whitewater river park at Confluence Park was constructed in 1974 - becoming the nation’s first designed park constructed in an active river. The whitewater course was totally re-designed by the author and rebuilt in 1995. Located within a very urbanized area and regulated floodplain, the structures making up the features act to form a diversion and stabilize this formerly degrading river channel. While the park is one of the most heavily utilized – particularly by novices – there have been no known drownings or serious injuries within this steep-gradient whitewater park. The various features of the park employ a number of design techniques and philosophies that have proven successful over the past almost 40 years. The safety related aspects of the park will be discussed and questions and discussion will be encouraged.

Rick Mclaughlin is an engineer at the Mclaughlin Whitewater Design Group – a Division of Merrick & Company. He has been the design engineer on a number of whitewater and multi-purpose recreational projects since the early 1980s. Some of these include the current configuration of Confluence Park, the 1996 Olympic Whitewater Venue, a large river restoration, diversion, and whitewater project on the American River, a very large scale river restoration and whitewater project in Columbus Georgia and a fish passage and whitewater course in Delta Colorado.

Published in: Business, Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
231
On SlideShare
0
From Embeds
0
Number of Embeds
3
Actions
Shares
0
Downloads
2
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Confluence Park - Safety-Related Success of the First Designed In-River US Whitewater Park - Rick McLaughlin, P.E., McLaughlin Whitewater Design Group, a division of Merrick & Company

  1. 1. 1 Copyright © 2012 Merrick & Company - All rights reserved. Confluence Park, Denver CO Looking Back at the Safety-Related Success of the First Designed In-River Whitewater Park in the U.S. Presented to the: April 2014
  2. 2. 2 Copyright © 2012 Merrick & Company - All rights reserved. Safety
  3. 3. 3 Copyright © 2012 Merrick & Company - All rights reserved. Safety
  4. 4. 4 Copyright © 2012 Merrick & Company - All rights reserved. Safety
  5. 5. 5 Copyright © 2012 Merrick & Company - All rights reserved. Safety Union Avenue Boat Chutes, Sheridan, CO One of the Most Dangerous Venues in Colorado High Flows (not the problem)
  6. 6. 6 Copyright © 2012 Merrick & Company - All rights reserved. Initial Conclusion  Is yours the same as a nationally recognized expert?
  7. 7. 7 Copyright © 2012 Merrick & Company - All rights reserved. Presentation Outline Confluence Park Safety Performance Safety Criteria  Criteria from the 1980s  New Objectives and Criteria Safety Features at Confluence Park
  8. 8. 8 Copyright © 2012 Merrick & Company - All rights reserved. Confluence Park Safety Record  No known fatalities or serious injuries since 1976  Canoe Crunching and raft catching “holes” eliminated in 1995  No changed hydraulic conditions in these 38 years of operations  Stepped Dam added in 1996 eliminated dam related safety issues - even in this heavily used reach.  Boated by intermediate kayakers in the 10-year flood event.
  9. 9. 9 Copyright © 2012 Merrick & Company - All rights reserved.
  10. 10. 10 Copyright © 2012 Merrick & Company - All rights reserved. Presentation Outline Confluence Park Safety Performance Safety Criteria  Criteria from the 1980s  New Objectives and Criteria Safety Features at Confluence Park
  11. 11. 11 Copyright © 2012 Merrick & Company - All rights reserved. Design Criteria for Recreation Structures http://www.udfcd.org/downloads/down_critmanual.htm http://cwcb.state.co.us/technical-resources/floodplain- stormwater-criteria-manual/Pages/main.aspx
  12. 12. 12 Copyright © 2012 Merrick & Company - All rights reserved. Emphases of Existing UDFCD Manual  Avoidance of Overly Retentive Hydraulics  Portages  +/- Design Suggestions  Signage/Barriers
  13. 13. 13 Copyright © 2012 Merrick & Company - All rights reserved. Emphases of Existing UDFCD Manual Overly Retentive Hydraulics
  14. 14. 14 Copyright © 2012 Merrick & Company - All rights reserved. Emphasis of Existing Manual Signage/Barriers Wide Ties and Polyester - Not Good Barriers - Not good
  15. 15. 15 Copyright © 2012 Merrick & Company - All rights reserved. Emphasis of Existing Manual Signage/Barriers No Standardized Messages or Graphics (This sign – Not Good)
  16. 16. 16 Copyright © 2012 Merrick & Company - All rights reserved. Other Recommendations in Existing Manual Confluence Park Design included these:  .Issues as previously outlined  Maximum drop height of 4 feet. If more, a physical hydraulic model may be necessary.  Determine characteristics to be compatible with public safety and recreational boating.  Assess stability of the structure.  Portage paths.  Obtain peer review on the preliminary design.  Allow for follow-up rock adjustment after completion, especially for boat chutes.
  17. 17. 17 Copyright © 2012 Merrick & Company - All rights reserved.  Use a Froude number, Fr, less than 1.5 at the toe of the drop.  Consider the slope of the downstream face of a sloping drop; 10(H) to 1(V) is common.  Provide boat chute with pilot rocks for routine boat passage of drop.  Use grouted sloping boulder or appropriately sized large ungraded sloping boulder structure.  Warning Signs Other Recommendations in Existing Manual Confluence Park Design did not include These:
  18. 18. 18 Copyright © 2012 Merrick & Company - All rights reserved. Emphasis of Existing Manual Summary:  Criteria and suggestions have demonstrated value and are still of upmost priority.  But over the past decade we have learned a lot more and the criterion are dated just like these kayakers.
  19. 19. 19 Copyright © 2012 Merrick & Company - All rights reserved. Updates Additional “Suggestions” Global Objectives:
  20. 20. 20 Copyright © 2012 Merrick & Company - All rights reserved. Proposed Updates Additional “Suggestions” Two-Dimensional Modeling • Complex Situations • Typical Applications
  21. 21. 21 Copyright © 2012 Merrick & Company - All rights reserved. Proposed Updates Additional “Suggestions” Summary of Other Suggestions:
  22. 22. 22 Copyright © 2012 Merrick & Company - All rights reserved. Proposed Engineering Related Criteria Obvious?
  23. 23. 23 Copyright © 2012 Merrick & Company - All rights reserved. Safety is More Challenging than Ever Aesthetics & Permitting (Grout - Bad) Innovative techniques to reduce grout have been successful, but ??? Pinned Boulder Technique used on the 2013 World Freestyle Championships, Nantahala River , North Carolina
  24. 24. 24 Copyright © 2012 Merrick & Company - All rights reserved. Photos: USBR Multiple Slot Baffled Safety is More Challenging than Ever Integration with Fish Passage
  25. 25. 25 Copyright © 2012 Merrick & Company - All rights reserved. Safety is More Challenging than Ever Diversion and Floodplain Objectives  At the New Whitewater River Park in Boise, ID: Surfers and Kayakers play in and around Gate and Intake Apparatus
  26. 26. 26 Copyright © 2012 Merrick & Company - All rights reserved. Safety is More Challenging than Ever Accommodating a Wide Range of Users
  27. 27. 27 Copyright © 2012 Merrick & Company - All rights reserved. Safety is More Challenging than Ever Limited Budgets
  28. 28. 28 Copyright © 2012 Merrick & Company - All rights reserved. Presentation Outline Confluence Park Safety Performance Safety Criteria  Criteria from the 1980s  New Objectives and Criteria Safety Features at Confluence Park
  29. 29. 29 Copyright © 2012 Merrick & Company - All rights reserved. Safety Features of Confluence Park
  30. 30. 30 Copyright © 2012 Merrick & Company - All rights reserved. Man-Made Jetty Design: Durable Construction Techniques
  31. 31. 31 Copyright © 2012 Merrick & Company - All rights reserved. Thank You Richard McLaughlin, PE McLaughlin Whitewater Design Group www.mclaughlinwhitewater.com rick@mclaughlinwhitewater.com 303-964-3333

×