Dingee Pressure Zone/Estates Improvements
Older
Facilities Require Upgrades
Schedule
Alternate Design
Concepts
Preferred Alternative
Notice of Preparation For The Estates Reservoir Replacement Project
Applicable Seismic Studies
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EBMUD is planning to reduce the storage volume in Estates Reservoir and eventually remove Dingee Reservoir from service to improve water quality and meet current seismic standards.
Older Facilities Require Upgrades
The work at Estates and Dingee reservoirs is part of a larger Central Oakland Hills Cascade (COHC) Pressure Zone Improvements Project, which includes 13 planned improvements over the next 20 years for water distribution facilities in the Oakland Hills south of Highway 24 and north of the Oakland/San Leandro border.
The Pressure Zone Improvements Project will:
- Improve water supply reliability through redundancy delivery systems.
- Improve water quality by increasing turnover in neighborhood reservoirs.
- Avoid rehabilitation costs for facilities that could be removed from service.
Work at Estates and Dingee reservoirs specifically includes:
- Installing two concrete storage tanks (2.8 million gallon capacity each) inside the footprint of the existing Estates Reservoir basin.
- Eventually removing Dingee Reservoir from service upon completion of the two replacements tanks at Estates Reservoir.
- Adding landscaping to Estates where facilities have been removed.
Several alternatives were considered when designing improvements to the part of the water system that includes Estates and Dingee reservoirs, including rehabilitating existing storage facilities. The improvements described above were selected because they provide the most cost-effective means of improving water quality and seismic safety.
The Estates Reservoir site
was identified as the optimum site for locating the new water storage reservoirs
because it can accommodate both tanks, has fewer construction impacts than
locating new tanks in the Dingee Reservoir footprint, has adequate space for
construction staging, and maintains the existing Montclair Pumping Plant.
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A Draft Environmental Impact Report (EIR) for the Estates Reservoir Replacement Project will be available for community input in the winter of 2009. EBMUD’s Board of Directors is expected to consider the Final EIR for certification in spring 2009. Design will follow with construction expected to begin in 2011.
The Pressure Zone Planning Program Study is available below as a PDF file
that can be viewed and printed through Adobe Acrobat Reader, a free software 
Facility Vicinity Map (30 kb)
Pressure Zone Planning Program Study (3 MB)
Click here for information regarding
the five alternative design concepts that have been developed for the Estate
Reservoir Improvement Project.
Preferred Alternative
A preferred alternative design concept for the Estates Reservoir
Improvement Project was presented at a June 25 public meeting held in Oakland.
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Notice of Preparation For The Estates Reservoir Replacement Project
The Notice of Preparation for the Estates Reservoir Replacement
is available as a PDF file that can be viewed and printed through Adobe Acrobat
Reader, a free software .
The Estates Seismic Study (Volumes 1 and 2) and the Dingee Seismic Study are available below as PDF files.
These can be viewed and printed through Adobe Acrobat Reader, a free software
Estates Seismic Final Report, Vol 1: Main Report (20.35 MB)
Estates Seismic Final Report, Vol 2: Appendices (10.12 MB)
Dingee Seismic Report (40.70 MB)
If you have questions or concerns, please contact Michelle Blackwell at mblackwe@ebmud.com or (510) 287-2053.