GLENDALE WATER SUPPLY IMPROVEMENT PROJECT

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GLENDALE WATER SUPPLY IMPROVEMENT PROJECT

• Truckee Meadows Water Authority
• April 5, 2007

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Agenda

• Introductions Ron Penrose
• Review of the public process and current project
  status Ron Penrose
• Review of the design parameters and modeling
  process Mike Wilkin
• View clips of the physical model video Mike
  Wilkin
• Review current plan set Mike Wilkin
• Permitting status update Ron Penrose Mike
  Wilkin
• Project Schedule - Ron Penrose

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Public Involvement Process
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Glendale Water Supply Improvement Project Goals

• Provide a reliable water supply to the Glendale
  Water Treatment Plant
• Allow full capacity treatment in normal flow
  years
• 100 capture of released storage water for TMWA
  customers in drought years
• Cost-effective design
• Technically feasible
• Consistent with the Truckee River Flood
  Management Project
• Environmentally sensitive design
• Supported by the community with public input

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Topics Studied By Working Group

• Location analysis
• Existing location and three alternative upstream
  locations
• Flood profiles and sediment transport!for
  alternatives
• Fish passage for all species
• Slope and velocities
• Mimic natural channel
• Boat passage
• Low flow passage for all experience levels
• Environmental analysis
• Restoration of disturbed riparian habitat
• Construction methods
• Structural and foundation requirements
• Construction staging requirements

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Working Group Meeting Concepts Incorporated into
the Physical Model

• Minimize exposed concrete surfaces
• Low flow roughened channel
• 4 downstream slope
• Utilize existing location
• Mimic natural channel features
• Fish passage of all species and ages
• Boat passage

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Physical Model Study Objectives

• Assess the performance of the fish and boat
  passage chute
• sufficient regions of depth and velocity
• eliminate dangerous hydraulic jumps
• Assess the performance of the intake
• normal and sweeping velocities
• Assess the performance of the sediment sluicing
  facilities and debris passage capabilities of the
  facility
• Develop water surface elevations for the new
  facility
• flood project compatibility
• Refine the design to improve performance

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Physical Model Test Program
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Physical Model 250 cfs
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Physical Model 1,500 cfs
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Physical Model 14,500 cfs
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Physical ModelFlood and Sediment Performance

• Physical model consistent with Corps RAS model
  predictions
• Localized reduction in flood profile
• 100-year flood passes under Glendale Bridge
• Efficient sediment passage over structure

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Design Improvements Developed during the Physical
Modeling Process

• Realignment of the sediment sluice gate in the
  intake channel to improve fish guidance
• Optimized angle of intake walls behind fish
  screens
• Moved chute and pool locations slightly upstream
  to lower velocities and improve fish passage into
  upstream pool
• Optimized design of right bank elevations
• Relocated log boom

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Fish Passage Goals

• Upstream and Downstream Fish passage of all
  species and ages
• Mimic natural channel
• Include Juvenile fish screen and bypass

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Fish and Boat Passage Opportunities

• River Discharge 1,500 cfs
• Intake Discharge 60 cfs
• Yellow text velocities recorded at 1/3 depth
• White text velocities recorded at 1/2 depth
• Green text velocities recorded at 2/3 depth
• Arrows denote flow direction and velocity ranges
  over weir
• lt5 ft/s
• gt5 to 8 ft/s
• gt8 ft/s

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Design and Modeling Summary

• The Project
• Utilizes the existing location
• Utilizes a low profile, rock faced, concrete weir
• Incorporates a 4 roughened channel on the
  downstream slope
• Provides fish passage for all species
• Provides for sediment transport
• Provides safe boat passage during summer flows
• Provides a Reliable Source of Potable Water for
  the Community

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Permitting Status

• 404 Permit Application with USACOE - In process
• 404 Public comment period closed with no
  comments
• Nevada State Lands permit request - In process
• Nevada 401 Water Quality Certification - In
  process
• State Engineer Encroachment Permit In process
• State Historic Preservation Office No
  historic properties were found within the area
  of potential effects

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Project Schedule

• Acquire all relative permits
• Two year construction process is anticipated
• Draft Storm Water Pollution Prevention Plan
  (SWPP) for construction is complete

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• Q A

Truckee Meadows Water Authority Ron Penrose,
P.E., Project Manager [phone] rpenrose_at_tmwa
.net