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HomeMy WebLinkAboutItem 12 PPP Operations 03-07-18_Project No. 3-62 r r West Side Pump Station and Seal Beach Pump Station Alternative Approach March 2018 - - _ Operations Committee o; Western Regional Service Area CERRITOS LA PALMA Ca Palma Ave LAKEWOOD BUENA escentAve PARK o r m HAW I IAN in Lincoln Ave ¢ GARDENS Q LONG Orange Ave m BEACH � Ball Ave rN HEIM m CYPRESS � o CerritosAve STANTON Katella Ave a m o LOS ALAMITOS ¢ ROSSMOORo r_ GARDEN GROVE L LEGfN0 Westside Knott Pump Orange-Western Station Trunk Sewer _Cypress Trunk tWESTMIN7STER Sewer(West) SEAL BEACH Cypress Trunk Sewer(East) Los Alamitos Trunk Sewer Seal Beach Blvd Trunk Sewer Westminster Blvd Westminster Blvd Force Main Seal Beach ■ Pump Stations Pump Station West Side Pump Station • Built 1962 (56 years old ) • Wet Well Replacement on Project 3-64 (^J$9 million ) • Problems: • Very close to neighbors • Only 15 year remaining life y estimated after wet well replacement � � Seal Beach Pump Station • Built 1973 (45 years old ) • Major rehab planned on � y Project 3-62 ($ 14 million ) x� • Problem : ` + • Too shallow (blocks �♦ upstream air movement) • Does not satisfy Hydraulic Institute standards .. • Remaining useful life 25 years, after rehab Westminster Blvd Force Mains Westside Pump Station SEAL BEACH WESTMINSTER m U Q) m Gro Westminster Blvd Seal Beach Pump Station • One force main unusable, other undersized • Replacement planned on Project 3-62 ($31 million ) Seal Beach Interceptor t� �:• touilt • • (49 years old ) d condition In goo WWI Shallower line by gravity SEEN— Carries flow from 2 upstream sewers Deeper line pumped by West Side Pump Station Shallow f R, �l Sewer °I Dee •Sewer West • - Pump StationPump Station Key Questions • Invest $9 million into West Side Pump Station for 15 years remaining life? • How would the West Side Pump Station be replaced ? • Invest $ 14 million in Seal Beach Pump Station despite : • Not meeting Hydraulic Institute standards? • Not allowing movement of foul air? • Needing to replace in 25 years? Current Approach Shallow Sewer Deep _ Sewer ` West Side Pump Station Seal Beach Pump Station Alternative Approach ,a West Side r , Pump Station Extension of Deep Sewer i Deeper Seal Beach Pump Station Alternative roar • Replace Seal Beach Pump Station with much deeper Pump Station • Run West Side Pump Station to failure (with frequent monitoring) • Prior to West Side Pump Station end of life, extend deep sewer from West Side to Seal Beach Construction Construction Current ' • - • • • . • Force Main Replacement $31.5 million Force Main Replacement $31.5 million Seal Beach PS Rehab $14.2 million Seal Beach PS $34.7 million Replacement West Side PS Wet Well $9.3 million Extend Deep Sewer $28.0 million Total $55.0 million Abandon West Side PS $0.9 million Total $95.1 million Long Comparison $350 mil $300 mil $250 mil 1 1 $200 mil J r - $150 mil Proposed Deep Option $100 mil — — J Current Shallow Option _F $50 mil $0 mil 2018 2023 2028 2033 2038 2043 2048 2053 2058 2063 2068 Alternative roar es • Current Shallow Seal Beach Pump Station Option • Increase 3-62 budget due to project developments • Deep Seal Beach Pump Station Option • Adjust CIP Program through budget process • Cancel plan to rehabilitate shallow Seal Beach Pump Station under 3-62 • Replace Seal Beach Pump Station on the same site with a deeper wet well . • Monitor condition of West Side Pump Station Wet Well • When West Side Pump Station end of life is approaching: • Construct a new deep sewer from West Side PS to Seal Beach Pump Station (—I mile) • Abandon West Side Pump Station when new deep sewer is constructed