1. City of Los Angeles Venice Dual Force Main Project
4/13/2017
City of Los Angeles
Department of Public Works
Venice Dual Force Main Project
Coastal Intercept Sewer
February 19, 2015
Presentation to the Santa Monica Bay Restoration Commission

2. 4 Wastewater Treatment Plants
Collection System
Covers 465 sq. mile service area
6,700 Miles of Sewers
4 Wastewater Treatment Plants
Operates24/7
We pick up your trash every week. We treat your wastewater every day.
We are the ones who come out to your meetings to tell you about our programs, and to listen to what you tell us.
We can agree that, every day, 24/7, the quality of life, health, safety, and economic vitality of our communities depend upon having sewers and treatment plants that work

3. We convey and treat 350,000,000 gallons of wastewater every day.
4/13/2017
We convey and treat 350,000,000 gallons of wastewater every day.

4. We have people working every day of the year to take samples from treatment plants, the coastline, L.A.’s ponds and rivers. We run hundreds of thousands of lab tests each year to be sure the operation of our facilities is protecting the public’s health and the environment.
We monitor 365 days a year for public and environmental health and run thousands of lab analyses every month. 4

5. Venice Pumping Plant and Force Main
4/13/2017
Venice Pumping Plant and Force Main
City’s largest pumping plant
Originally constructed in 1957
Five 14,000 gpm rated pumps
Flow rates
24 mgd, typical dry-day flow
Up to 87 mgd, wet-weather peak
Existing Force Main
2-miles long
48-inch diameter
Reinforced concrete pressure pipe
Flows to the Coastal Interceptor Sewer (CIS) then on to the Hyperion Treatment Plant

6. Critical Issues and Drivers
4/13/2017
Critical Issues and Drivers
Continuous operation for more than 50-years, never been out of service, drained or inspected
No redundancy
Only conveys approximately 60% of peak wet-weather flows
No cost-effective means for planned repairs or in the event of an unanticipated failure
No-Action is not an Option !

7. City’s Key Objectives Protect Health and Environment Create redundancy
4/13/2017
City’s Key Objectives
Protect Health and Environment
Create redundancy
Ensure conveyance capacity
Provide ability to perform inspection, maintenance or repairs

8. 4/13/2017
Pressing Need
The existing 48-inch diameter, force main has been in continued service for over 50 years.
It can not handle peak wet weather sewage flow at the Venice Pump Station.
It can not be shut down to assess its condition or to perform needed repairs.
It is the only sewage conveyance option from Venice Pump Station to the existing junction structure under Vista Del Mar.

9. Solution Construct a new 54-inch diameter force main which:
4/13/2017
Solution
Construct a new 54-inch diameter force main which:
Connects to a common manifold at Venice Pump Station and discharge into the structure under Vista Del Mar, 2 mile away.
Provides needed capacity and redundancy, eliminating the looming threat of a sewage spill.
Provides for assessment and repairs of the existing force main.

10. EIR Studied Alignments
The project alignment is approximately two miles long.
The alignment starts at the Venice Pump Plant located on Hurricane Street. It will cross Grand Canal, travel east to Marquesas Way, then south along Via Marina crossing the Marina del Rey and Ballona Creek Channels to meet an existing Coastal Interceptor Sewer junction structure on Vista del Mar near Waterview Street.
During construction of this sewer force main, a micro-tunneling technique will be used for most of the alignment. (explain method briefly)
The micro-tunneling technique will be used because it has less impacts on the public, particularly under the channels.
The last 1000 feet in Playa del Rey along Vista del Mar, however, will be open trenching. (briefly explain why open trenching is necessary)
We know there will be impacts related to this construction but along the streets, we will always have one lane of through-traffic open.

11. Evaluated Alignments in Certified EIR
4/13/2017
Evaluated Alignments in Certified EIR
Three alignment alternates:
Pacific Alignment
Dockweiler Beach Alignment
Via Marina/Pacific Alignment

12. Selected Alignment Via Marina / Pacific Alignment.
4/13/2017
Selected Alignment
Via Marina / Pacific Alignment.
Construction of 10,400 feet long new 54-inch diameter force main using microtunneling (approx . 9,500’) construction method and open trench (approx. 900’) method.
4,100 feet of sewer alignment is under Via Marina.
1,800 feet of sewer alignment is under the channels.
4,300 feet of sewer alignment is south of the channels.

13. VDFM Alignment The project alignment is approximately two miles long.
The alignment starts at the Venice Pump Plant located on Hurricane Street. It will cross Grand Canal, travel east to Marquesas Way, then south along Via Marina crossing the Marina del Rey and Ballona Creek Channels to meet an existing Coastal Interceptor Sewer junction structure on Vista del Mar near Waterview Street.
During construction of this sewer force main, a micro-tunneling technique will be used for most of the alignment. (explain method briefly)
The micro-tunneling technique will be used because it has less impacts on the public, particularly under the channels.
The last 1000 feet in Playa del Rey along Vista del Mar, however, will be open trenching. (briefly explain why open trenching is necessary)
We know there will be impacts related to this construction but along the streets, we will always have one lane of through-traffic open.

14. VDFM Alignment under Marquesas Way/Via Marina

15. VDFM Alignment under Pacific Avenue/Vista Del Mar

16. 4/13/2017
Intersection

17. ALONG VIA MARINA FACING SOUTH AT TAHITI WAY
WORK SITE AREA
K-RAILS
ROAD
CLOSED

18. Tentative Project Schedule Construction Duration
4/13/2017
Tentative Project Schedule
Project Permits Now - March 2015
Contract Award Fall 2015
Construction Spring 2016
Construction Duration
Marina del Rey area Less than 20 months
Total Construction Period Approx. 36 months

19. Project Status EIR Certified in 2010
Coastal Development Permits Needed
County of LA
City of LA
CA Coastal Commission

20. LA Sanitation Public Affairs Mon- Fri regular business hours
4/13/2017
Contact Us
Website
LA Sanitation Public Affairs
(213)
Mon- Fri regular business hours
24-Hour Hotline
(424)
Thank you for providing us with the opportunity to talk to you about the proposed Venice Dual Force Main. I hope I have adequately explained
What we are proposing,
why we need to build it and
Why we chosen the proposed route.
Please let me know if you have any questions.