J.A. and Kathryn Albertson Family Foundation Boise Whitewater Park Ph II User Group Meeting 01/23/2018 Presented by: John Tensen P.E.

Transcription

1 J.A. and Kathryn Albertson Family Foundation Boise Whitewater Park Ph II User Group Meeting 01/23/2018 Presented by: John Tensen P.E., Project Manager Kelly Burrows, Development Coordinator Morton McMillen, P.E., McMillen Jacobs Associates Scott Shipley, P.E., S2O Design

2 Presentation Topics Introductions Goals, Objectives, & Background (John Tensen) Project Configuration & Concept Plan (Mort McMillen) Hydraulic Modeling and Wave Feature Configurations (Mort McMillen/Scott Shipley) Project Operations (Scott Shipley/Kelly Burrows) Next Steps/ Construction Schedule/ Approach (Mort McMillen)

3 Items of Clarification Boise Whitewater Park Phase II vs. Bank Repairs Boise Whitewater Park Phase III Slalom Course

4 Goals, Objectives, & Background

5 Project Overview Two Projects ESP Whitewater Park Ph 2 Project Goals Irrigation Delivery (FUDC/BVID) Flood Mitigation River Safety Recreation Active Passive Greenbelt Functionality Habitat Improvement

6 Esther Simplot Park Funding J.R. Simplot Foundation Design Builder- McMillen Jacobs Park Opened November 2, 2016

7 Whitewater Park Ph IIA Farmers Union Intake Structure Highlights McMillen Jacobs Design- Build Contract with Boise City Construction: October 2015 thru February high x 26 wide x 380 long Concrete Box Culvert

8 Whitewater Park Ph IIA Farmers Union Intake Structure

9 Boise Whitewater Park Phase IIB Configuration & Concept Plan

10 Whitewater Park Phase IIB Design and Construction Highlights McMillen Jacobs Design-Builder S2O Design DHM Design Jensen Belts Associates Phase IIB General Information Funding from City of Boise and the J.A. and Kathryn Albertson Family Foundation Estimated Cost $7.0M Design and Permitting May 2016 thru Feb 2018 Construction August 2018 thru July 2019 (two non-irrigation seasons)

11 Boise Whitewater Park Phase IIB Overall Project Configuration Reach 1 Reach 2 Reach 3 Whitewater Park Phase II ESP

12 Reach 1 Updated Concept Plan

13 Reach 1 Features Wading Area

14 Reach 3 Features Take-Out Ramp

15 Reach 3 Features Greenbelt Relocation

16 Reach 2 Updated Concept Plan

17 Reach 2 Updated Concept Plan River Bank Restoration/Spectator Seating

18 Reach 2 Updated Concept Plan Drop Structure 1

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20 Reach 2 Updated Concept Plan Drop Structure 1

21 Reach 2 Updated Concept Plan Drop Structures 2 and 3

22 Hawea, NZ

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28 Hydraulic Modeling, & Wave Feature Configurations

29 1D & 2D HEC-RAS Modeling Boise River Water Surface Elevations/No Net Rise Analysis #1 Structure

30 1D & 2D HEC-RAS Modeling 900 cfs 2D Velocity Modeling 1,500 cfs 2D Velocity Modeling

31 1D & 2D HEC-RAS Modeling 3,000 cfs 2D Velocity Modeling 7,000 cfs 2D Velocity Modeling

32 University of Idaho Physical Model January 2017

33 U of I Physical Model Why physical model Provides the best information about what we will get (what you see is what you get): Attraction Wave of sufficient height and power to surf on a surfboard and/or kayak, and to be an attraction to users from all over the region Utility That the wave should be usable by both surfers and kayakers Resilient That the wave would be easier to adjust than the Phase I feature, which has a very narrow and fickle band of adjustability Accessible That the wave would have varying options for accessing the wave (a wall separates the users from the wave in Phase I) Maintenance That the wave would be easier to maintain than the Phase I feature, which requires commercial divers to maintain

34 U of I Physical Model Methodology 20 meter long flume at UI lab with recirculating pump Wave feature constructed from foam/composite board and an adjustable framing system to match previously completed concept design. Design based on concepts from Munich Wave and Nottingham Wave Gate. Model simulations/runs 34 different configurations Look at head upstream, downstream, water depth, geometry, wave height, etc.

35 U of I Physical Model

36 U of I Physical Model Outcome The project met the objective of creating an adjustable wave that is between 4 and 6 high The wave has a wide gamut of adjustability and works with flow rates that are +/- 25% The wave can be configured with either a central pile or piles on both sides with a central green chute. Resulting design changes The modeling resulted in several changes including: Geometry of gate, width of kickers, and downstream RapidBloc Configuration

37 U of I Physical Model

38 U of I Physical Model Target Wave Flow Shorter Wavelength Longer Wavelength

39 U of I Physical Model Scott to Fill in: - Screenshot of Plan view and Section of final wave feature geometry

40 U of I Physical Model

41 Project Operations

42 Drop Structure 1 Operation Water Allocation: 4. Excess river flows spilled over floodway cfs to fish ladder & stream activation cfs to FUDC Canal 3. Wave Feature 900 cfs

43 Design Flows FUDC irrigation intake = 320 cfs (March October) Drop Structure 1 Design Flow = 900 cfs Structure closed at City discretion above 3,000 cfs Drop Structures 2 and 3 Typical Flow = cfs (full river flows) Drops submerged at?? cfs

44 Drop Structure 1 Operation Example Flow Operation Schedule during Irrigation Season: Example Flow Operation Schedule during non-irrigation Season:

45 Draft Programming Schedule

46 Whitewater Park Programming/ Management Concepts General Whitewater Park Access from Boise City Side of River Maintain HOA Privacy Parking Concerns Conservation Easement Compliance Major Events Require Permits Access control Parking Traffic management/shuttle service Trash cleanup Security Insurance/Bonding

47 Next Steps, Construction Schedule, & Approach

48 Next Steps Develop Final Plans (January March 2018) Garden City Approval Waterfront HOA Easement Right-of-Way Agreement Permits (404, Boise River Permit) FUDC Approval Material Procurement (March August 2018) Begin Construction (August 2018 July 2019)

49 Construction Schedule/Approach Reach 1 Reach 2 Reach 3 Whitewater Park Phase II ESP Start Construction August 2018 Divert river into canal Remove debris from FUDC and place in Veterans Pond for greenbelt Construct drop structures and bank improvements Be out of river by end of February Feb. - July. Complete upland improvements (greenbelt, bank improvements, landscaping)

50 Construction Schedule/Approach Normal Work Hours 7 a.m. to 7 p.m. Access from Boise City Side of River Lighting Control Fish Salvage Greenbelt Closure

51 Boise Whitewater Park Phase IIB Comments? Comment Cards Questions? Concerns? Concurrence?

52 Boise Whitewater Park Phase IIB Thank you for your time.