YOUR BONITA (BEAUTIFUL) PUMP STATION, THE DISTRIBUTION SYSTEM HEART MICHAEL IDEHARA, P.E.*

*LICENSED IN OR

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AGENDA • Program and Project Background • Bonita Pump Station Design

Features • Construction Highlights

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PROGRAM AND PROJECT

BACKGROUND

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• August 2008 – Cities of Lake Oswego and Tigard enter partnership agreement to share drinking water resources and costs.

• City of Tigard has been a customer of Lake Oswego since 1970’s.

• Tigard customers gain a long-term, affordable drinking water source.

LAKE OSWEGO TIGARD WATER PARTNERSHIP

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Overall Facilities Map

PROJECT BACKGROUND

Tigard Water System

•Replace existing PS

• Future demand 14-20 MGD

•Multiple sources of supply

•New dual pumping zone pump station

•Build-out capacity = 20 MGD

•Waluga Reservoir (LO) to Tigard 410 and 470 zones

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Source: www.tigard-or.gov

PROJECT BACKGROUND

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Existing Bonita PS

New Bonita PS

Bonita Rd

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72

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Location Map

DESIGN FEATURES

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Pump Station Capacities

•2016 demands = 14 MGD

•470 zone = 9 MGD

•410 zone = 5 MGD

BONITA PUMP STATION DESIGN FEATURES

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•Build-out = 20 MGD

•470 zone = 14.4 MGD

•410 zone = 5.5 MGD

•VFD Driven Vertical Turbine Pumps

•Pump to two zones; PZ 410 and PZ 470

•4 pumps – Dual Service PZ

•PZ 470 = 3.67 MGD

•PZ 410 = 4.50 MGD

•1 Pump = 4.50 MGD

• Future Pump = 4.50 MGD

BONITA PUMP STATION DESIGN FEATURES

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Building Construction

• 2010 OSSC

• 2012 Oregon Energy Code

• Low height impact

• Conditioned spaces

BONITA PUMP STATION DESIGN FEATURES

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• Insulated wall panels

• Skylights over pumps

• CMU Walls

• Standing seam metal roof (insulated)

BONITA PUMP STATION DESIGN FEATURES

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VTP

Suction Header (buried/outside)

VFD’s Switchgear

Heat Pumps

410 Zone 470 Zone

Future VTP

Floor Plan

BONITA PUMP STATION FEATURES

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CONSTRUCTION HIGHLIGHTS

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NOISE LIMITATIONS

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Design Criteria:

• 40 dBA at noise‐sensitive property boundaries.

• 60 dBA at non noise‐sensitive property boundaries.

Heat Pumps

Engine Generator Acoustical Intake Louvers

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45 dBA

50 dBA

55 dBA

60 dBA

65 dBA 70 dBA

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40 dBA

45 dBA

50 dBA

55 dBA

60 dBA

INSULATED BUILDING ENVELOPE

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• Compliance with Oregon Energy Efficiency Specialty Code

• Simplified Trade-Off Approach - COMcheck

• Insulated roof panels = R-20 ci

• Insulated wall panels = R-11 ci

• Roofing consultant

FLEXIBILITY IN SUCTION AND DISCHARGE PIPING

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• Liquefaction-induced settlement

• Displacement during MCE = 3-inches

• Flexibility in piping vs alternate foundation design.

• Mechanical couplings

• Tie-rod design must consider stress and strain per HI.

FLEXIBILITY IN SUCTION AND DISCHARGE PIPING

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• Two joints to provide flexibility

• No joint deflection during installation

• Pump cans and buried piping isolated from building foundation

PRESSURE TESTING BUTTERFLY VALVES

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• BFV’s pressure tested prior to installation

• Each side of valve disc tested

SUMMARY

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• Consider requirements of the Oregon Energy Code.

• Acoustical analysis is a useful tool to identify and mitigate high noise levels.

• Consider tie rod strain, not just stress.

• Consider pressure testing valves before installation.

Construction progress to date

Michael Idehara, P.E.*

Black & Veatch 5885 Meadows Rd, Suite 700 Lake Oswego, OR 97035 503-443-4468 | IdeharaMT@bv.com *Licensed in OR

CONTACT INFORMATION

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QUESTIONS?

mailto:IdeharaMT@bv.com

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