2022 Sewer Rehabilitation Project

This project will rehabilitate the sanitary sewer system on several roads including Meadowsweet Drive, Tamalpais Drive, Casa Buena Drive, Alta Terrace, and Manzanita Easement. The project goal is to replace outdated sewer mains and manholes, reduce inflow and infiltration, and to continue to improve the overall function of the Sanitary District No. 2 collection system. The District will also replace all private lower sewer laterals as part of the Lower Lateral CIP Pilot Program and will also assist homeowners with upgrading their upper laterals to fully satisfy the 2018 Private Sewer Lateral Ordinance.

 Meadowsweet Drive Phase II - The recent “atmospheric river” event should redefine how we assess and plan sewer capacity in general, but specifically since the October 2021 storm and surcharging event on the Meadowsweet Drive Trunk Sewer the planning of the future trunk sewer rehabilitation had to be designed to prevent future sewer surcharges. In light of this, the District allowed Nute Engineering to modify the goals of the Meadowsweet Drive Trunk Sewer Phase II proposal of slip-lining and downsizing the remaining Meadowsweet Drive trunk sewer to:

• Moving the upstream sewer discharge of the Lakeside Pump Station and Tamalpais Pump Station force main to the trunk sewer from the manhole vault at Sausalito St., which is immediately upstream of MH C5-30, to approximately 750 feet downstream on Lakeside Drive and Meadowsweet Drive, reconnecting to the trunk sewer with a new manhole., which should alleviate the pulsed pump station discharges affecting the shallowest manhole in the system. 
• Construct another 696 LF of new 24” sewer segment of the trunk sewer from where last year’s sewer project (Phase 1) left off at Conow St. and Meadowsweet Drive to Laurel Drive. This sewer will also maintain the new sewer depth gained during last year’s sewer project.
• The remaining 2,297 LF of existing trunk sewer should be cleaned and monitored during the next winter season to determine if the surcharging still occurs and to reevaluate the needs and goals of a potential “phase 3” project.

Casa Buena Drive - The Town of Corte Madera is planning future street and right of way improvements on Casa Buena Drive and thus the District has determined that it is beneficial to rehabilitate its underlying infrastructure prior to the installation of the new roadway. Casa Buena Drive sewers collect local area sewage prior to crossing the Highway 101 right of way. The District plans to rehabilitate 1277 lateral feet by pipe bursting for this year’s project.

Alta Terrace Easement - Last winter the District had an overflow at this location, which triggered staff to review the existing conditions and determine the cause. After cleaning and videoing the line, it was determined that the sewer main is in poor condition and in need of immediate rehabilitation. As a result, this project will rehabilitate 262 lateral feet of sewer with this year’s bid project. 

Manzanita Easement Sewer – The District’s Master Plan had identified the Manzanita Easement sewer as very difficult to maintain due to damage at the upstream portion of the sewer, which also serves as a cleaning and maintenance access point. To improve the deficient sewer main and to improve future maintenance operations this line will be rehabilitated by pipe bursting and a new upstream rodhole will be provided.  

Grove Ave- Full Length -  The 2022 Sewer Rehabilitation Project has been underway since July of 2022.  During a recent CCTV inspection of the sewer main that runs through Grove Avenue, Sanitary District No. 2 has determined this section of sewer is in urgent need of replacement ultimately making this a priority for the Sanitary District. Sanitary District No. 2 has shifted our resources to correct this condition and has engaged our Sewer Contractor to initiate the replacement of the sewer main as soon as next week, September  26, 2022.  Work will take place between 8am and 5pm and is expected to last 4 weeks. 

• NOTICE TO GROVE RESIDENTS Mailed Out on 10/24/22: Sanitary District No. 2 is continuing the rehabilitation of the older, existing sewer on Grove Ave. The upper portion of Grove Ave. has been rehabilitated along with the lower laterals and cleanouts.
  Our contractor has performed the lateral investigation for the lower portion of Grove Ave. and during this investigation we’ve discovered that the old sewer main shares a common trench with the water main of Marin Municipal Water District (MMWD). The sewer is located three to four feet below the water main and does not pose a risk to the water main, however, the current code prohibits these utilities sharing the same trench. Our recent discovery will force Sanitary District No. 2 to install the new segment of sewer away from the water main, and will be relocated near the center line of the Grove Ave.  Unfortunately, this unforeseen modification/relocation of the sewer will cause a temporary road closure during the work days (8:00 AM to 5:00 PM) while crews initiate the installation of the new sewer line.
  
  Upper Grove Ave. traffic will be directed down the Harman Ave. alley way to Montecito Dr. during the work day closures. The District contractor will place a new layer of gravel and compact the gravel.
  For the properties directly affected by the road closure on the lower portion of Grove, we ask that you please move your cars before 8AM, to either Montecito Ave. or Menke Park to avoid unnecessary delays associated with the project.
  
  The Sanitary District’s contractor will provide informational door hangers to those residents impacted by the road closures 24 hours prior to the implementation of the closures notices.
  
  

FAQ's

What streets are included in the CIP project? Meadowsweet Drive, Tamalpais, Casa Buena Drive, Alta Terrace and Manzanita Easements.

How do I know when work will take place in front of my home? The contractor will pass out door hangers 72 hours before work begins on a new street in the project. They will also place “No Parking” signs where work will be taking place. An example of the notification can be found here. 

Will the contractor close my road so I will not have access to my home? No, the contractor is required to keep access open to the neighborhood at all times with minor traffic delays. Emergency vehicles will always have access through the work site. On some streets they may have closures to through traffic and a detour, while on other streets with no alternate route, they will leave one lane of traffic open and have alternating traffic control.

Will I have access to my driveway during working hours? The contractor will do their best to keep access open to all driveways during working hours Monday – Friday, 8:00am to 5:00pm. There may be some points where they must work directly in front of a driveway and providing access will take some time. Please speak with the contractor’s staff to coordinate access to your home.

Will the contractor shut off my sewer service? No, the contractor will knock on your door and request you do not use any appliances that use a lot of water before work begins, but your sewer service will not be completely shut off.

When do I need to pressure test and/or replace my upper lateral? Per the notification letter sent to all addresses that are part of the CIP project, homeowners do not need to do any work until the Sewer District’s sewer project is complete (anticipated Fall, 2022). Once the project is complete, the District will send a follow up letter to all residents giving 180 days to pressure test, and if necessary, replace their upper lateral.

Traffic Control Plans  

Click here to review the traffic control plans for each segment of the project.  

Project Schedule 

The following is a tentative construction schedule:

• July 22, 2022 - August 11, 2022 
  • Lakeside Force Main Extension               
  • (Tamalpais Dr. from Sausalito St. to Lakeside Dr.)          

• August 3, 2022 - September 2, 2022 
  • Meadowsweet Drive Open Cut Sewer     
  • (Between Conow St. and Laurel Dr.)       
• August 30, 2022 - September 30, 2022      
  • Casa Buena Drive Pipe Bursting

• August 30, 2022 - October 6, 2022   
  • Alta Terrace Pipe Bursting                        
  • (Easement Between Chapman Dr. & Alta Terrace)

• October 24th, - November 2022  
  • Manzanita Ave Pipe Bursting         
  • (Easement Between Manzanita Ave & Meadowsweet Dr.)

• September 26, 2002- October 21, 2022   
  • Grove Avenue- (Lower Segment)  Pipe Burst  

• October 25, 2022 - November 4, 2022
  • Grove Avenue- (Upper Segment)  Road Closure with Traffic Redirected Down Harman Alley-  (Saw Cut, Trenching, Sewer Replacement-Center of Roadway) 
• November 21, 2022- December 24, 2022
  • Alta Terrace Pipe Bursting
  • (Easement Between Chapman Dr. & Alta Terrace)

Status: Construction by  Cratus, Inc.

Project Type(s): Sanitary District 

Construction Schedule: If you still have questions regarding this work, please contact Fernanda Stefanick at (415) 927-5792 fstefanick@tcmmail.org.