Planning Commission Briefing December 13, 2017

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1 Planning Commission Briefing December 13, Water Treatment Plant Master Plan Update Eric Mende, PE Capital Projects Engineering Manager Jude Grounds, PE, Carollo Engineers

2 Purpose of 2017 Master Plan Update Incorporate Level of Service Goals from 2015 MP Address 20 and 30 MGD Capacity Expansions Identify Lower Site Repairs/Replacements/Upgrades Implementation Plan (CIP, schedule) Coordinate with WWSP Raw Water Facility Upgrades

3

4 A Brief History Built / Operational in 2002 ($47M) Joint Ownership with TVWD 70 MGD Design* Conservative LOS goals/operations Current Capacity: 15 MGD (10 WV, 5 Sherwood) Still state of the art

5 Technical Summary: Multi barrier approach guides design and operational philosophy Turbidity / Particles Pathogens Tastes and Odors Trace Organics / CEC s Chlorine Actiflo Ozone Filters Clearwell

6 Purpose of 2017 Master Plan Update Incorporate Level of Service Goals from 2015 MP Address 20 and 30 MGD Capacity Expansions Identify Lower Site Repairs/Replacements/Upgrades Implementation Plan (CIP, schedule) Coordinate with WWSP Raw Water Facility Upgrades

7 Level of Service Goals (Water Quality) A B C Water Quality Goals Keep current, very conservative water quality goals. Keep very conservative operational criteria (SF = 2) Keep current, very conservative water quality goals. Modified operational criteria (SF= 1.5) Lower WQ goals using aggressive operational criteria (SF = 1.0) Design / Operating Criteria Actiflo: 7.5 mgd (rated at 14 MGD) Filters: 5 mgd (rated at 10 MGD) Ozone/Chlorine: 1 log Crypto inactivation Actiflo: 10 mgd Filters: 6.7 mgd Ozone/Chlorine: 1 log Crypto inactivation Actiflo: 14 mgd Filters: 7.9 mgd Ozone/Chlorine: 1 log Crypto inactivation

8 Level of Service Goals (Seismic)

9 Purpose of 2017 Master Plan Update Incorporate Level of Service Goals from 2015 MP Address 20 and 30 MGD Capacity Expansions Identify Lower Site Repairs/Replacements/Upgrades Implementation Plan (CIP, schedule) Coordinate with WWSP Raw Water Facility Upgrades

10 20 MGD Capacity Expansion Uprating existing equipment Minor equipment upgrades to support uprating Seismic / Life Safety Improvements Filtration pilot study or demonstration Recommend electrical upgrade

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12 30 MGD Capacity Expansion Expand at uprated design criteria Designed to new seismic code Reduces construction cost Conserve space for 60 MGD buildout at Lower Site

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14 Lower Site Repair and Replace Ongoing equipment repair and replacement schedule Annual basis Veolia

15 Seismic Retrofits Repairs to existing facilities to bring them to current seismic code Example: Addition of concrete braces to WWEQ Basin

16 Life Safety Repairs Tasks pertaining to building and hazard codes Projects include fall protection, hand railing, GFCIs, etc.

17 Equipment Repair & Replace Addresses equipment replacement due to service life Whenever possible ties in with capacity expansion

18 Purpose of 2017 Master Plan Update Incorporate Level of Service Goals from 2015 MP Address 20 and 30 MGD Capacity Expansions Identify Lower Site Repairs/Replacements/Upgrades Implementation Plan (CIP, schedule) Coordinate with WWSP Raw Water Facility Upgrades

19 Coordinated Facility Upgrades Coordination with Willamette Water Supply Raw Water Pump Station Upgrade (24/25) Seismic Upgrade (Secant Pile Wall) (21/22) Generator Upgrade (18/19)** Electrical (Substation) Upgrades (18/19/20) Surge Tanks (18/19)** ** WV Project

20

21 CIP Schedule Project Approx Service Year Duration (Months)) Design Construction Start Date 20 MGD Capacity Expansion Life Safety Repairs Seismic Retrofits Electrical Upgrades MGD Capacity Expansion Operations Repair and Replace Ongoing Annual Projects

22 CIP Project Estimate Project Cost % Water Operations % SDCs 20 mgd Expansion $3,893, % 30 mgd Expansion $32,518, % Life Safety Repairs $616, % Seismic Retrofits $1,151, % Electrical Upgrades $11,082, % Operations Repair and $19,045, % Replace

23 Implementation Plan/CIP

24 Master Plan Next Steps MP Adoption Process Planning Commission Work Session 12/13/17 Planning Commission Hearing 2/14/18 City Council Work Session (3/5/18) City Council 1 st Reading (3/5/18) City Council 2 nd Reading (3/19/18) Effective Date 4/19/18 24

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