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