DOWNTOWN PROJECT UPDATE
June 18, 2020
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The Downtown Project will focus on upgrading the infrastructure – below and above ground – in the Downtown area.
The project’s goals are to repave the roadways, repair the sanitary sewer system, make drainage improvements, and upgrade pedestrian curb ramps.
The project began in April and is estimated to finish in September 2020.
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Weekly Progress Report*
Last week, the City's Contractor, KJWoods, conducted:
- West Blithedale Ave.- Closed-circuit TV inspection
- Sunnyside Ave.- Pipe burst sewer repair work and sewer lateral work
This week, KJWoods conducted the following:
- Corte Madera Ave.- Curb ramp work (see article below), closed-circuit TV inspection
- Throckmorton Ave.- Trench restoration, Closed-circuit TV inspection
- West Blithedale Ave.- Curb ramp work (see article below), closed-circuit TV inspection
- Sunnyside Ave.- Closed-circuit TV inspection
- East Blithedale Ave.- Closed-circuit TV inspection
In upcoming weeks, KJWoods will conduct the following:
- West Blithedale Ave.- Trench restoration
- Sunnyside Ave.- Sag repair, trench restoration
- East Blithedale Ave.- Sag repair, trench restoration
- West Blithedale Ave.- Curb ramp work, sewer abandonment (see article below),
- Corte Madera Ave.- Curb ramp work, sewer abandonment (see article below),
- Lovell Ave – Curb ramp work.
- Gardner Street, West Blithedale and Corte Madera Avenues – Paving work estimated from July 13 – 24 (see article below for information)
* All estimated timelines are tentative and subject to change.
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What is Sewer Abandonment?
When an old underground sewer pipe system is replaced or no longer needed due to an upgrade, the project engineer may wish for the existing pipe to undergo a process called "sewer abandonment" where the pipe is filled with low density grout containing cement and lightweight cellular foam. The fill prevents the pipe from caving in causing potential settlement issues.
Abandoning pipe is an economical method of sealing off the unused pipe and less expensive than complete removal. Many of the City's sewer lines are made of clay tile and subject to deterioration, cracking, and breaking, making the pipes in this location good candidates for abandonment.
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Ongoing Work:
Curb Ramp Work – June 15 – 26*
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The curb ramp work continues this week and into next week. Workers are demolishing and rebuilding 15 curb ramps to bring them up to ADA standards, making them accessible for all users. The work is taking place on West Blithedale and Corte Madera Aves, Lovell Ave, with a phased schedule to allow access for pedestrians during construction.
Residents and businesses should expect impacts such as construction equipment, noise, dust, and sidewalk closures and pedestrian detours while the work is in progress. For details, please see the image above and click here for a
click here for a larger version
.
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Upcoming Work: Paving – July 13 – 24*
The City contractor will use a method known as "Grind and Overlay" to pave segments of Gardner Street, West Blithedale and Corte Madera Avenues. Work is scheduled to begin July 13 and take approximately 10 weekdays to complete.
"Grind and overlay" is a process to replace old pavement by grinding it down around 2" and then replacing it with a new layer of asphalt. This is a cost-effective way to maintain our roadways, as reconstructing the streets can cost up to three times as much.
Residents and businesses should expect impacts such as construction equipment, noise, dust, lane closures, limited driveway access and parking restrictions while the work is in progress.
The Contractor will post no-parking signs 48 hours prior to starting the work. To help ensure a safe and successful project, we request that you observe all no parking signs, traffic control signs, flagmen and vehicle/pedestrian barriers.
* All estimated timelines are tentative and subject to change.
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Mitigating Construction Impacts
City and Construction Management staff are making every effort to mitigate impacts during construction.
Mitigation measures include:
- “Trenchless” construction methods wherever feasible.
- Traffic control to keep one lane open with flagger directing traffic whenever possible
- Pedestrian traffic control to safely direction pedestrians.
- Providing staging areas for the contractor at the Corporation yard and City Hall to minimize on-street impacts
- Employee parking at City Hall will be eliminated during the project, making those spots available for community members and project staging
- Proactive, early notification for residents and businesses in the project area
- Public access to driveways at all times where feasible
- Coordinate business access for delivery trucks with local business
- Sidewalk and street sweeping daily
- Dust control measures
- Regular communication and coordination with the Chamber of Commerce, Downtown stakeholders and the wider community
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Downtown Businesses Update
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Where can I learn more about the project?
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City and Construction Management staff are available to answer questions and review concerns.
Construction Management:
Phone: (916) 806-0278
Construction and Design:
Phone: (415) 384-4755
Public Outreach and Communications:
Linn Walsh, Senior Management Analyst | Email:
[email protected]
| Phone: (415) 388-4863
Please also check out the Project Website:
Stay Informed
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Thank You for Your Patience During Construction
The City of Mill Valley would like to send out a special thank you to the Mill Valley community for your patience during construction.
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