Adopt a Resolution Approving the
First Addendum to the Certified
East West Connector Final
Environmental Impact Report for
Quarry Lakes Parkway -Phases
(Segments) 1-4, City Project No.
18-04
Marilou R. Ayupan, Public Works Director
City Manager Report- Item 5.1
April 28, 2026 - City Council Meeting
2 Station District and Quarry Lakes Parkway
3 History of East West Connector/Quarry Lakes Parkway
§ 1986: Caltrans Historic Route 84 project identified in 1986 Measure B § 2003: ACTA becomes Project Sponsor for Route 84 Options, which becomes the East-West Connector (EWC) project.
§ 2009: Alameda CTC certified Environmental Impact Report (EIR) for EWC § 2018: Alameda CTC approved Union City as new Project Sponsor and Lead Agency for CEQA
§ 2019: Union City executed the Caltrans PSA for development of former Caltrans property (Gateway Site) and CTC approves in 2021 transfer of property to City
§ 2020-2026: The Quarry Lake Parkway, Phases 1-4 roadway design has been revised to improve access for transit, bikes, pedestrians and connections to neighborhoods, parks, businesses, and to reduce environmental impacts
4 Approve the First Addendum of the EWC Final EIR for
Quarry Lakes Parkway, Phases 1-4
2009 Certified EWC EIR
The First Addendum to
evaluates changes in the
project related to:
• Roadway Design
• Drainage Infrastructure
• Biological Mitigation
5 QUARRY LAKES PARKWAY, PHASES 1-4
Old Alameda
Creek
Alameda Creek
Flood Control
Channel
Line M
Line M
6 Quarry Lakes Parkway, Phase 2
Key Changes to Roadway, Drainage and Mitigation
• Relocated Water Quality Treatment
basin next to Old Alameda Creek and
relocated Hydromodification basin to
the underutilized Old Alameda Creek
• Evaluated other onsite mitigation
locations options incl. an offsite
mitigation option
• Realigned QLD closer to Old Alameda
Creek and realigned QLP parallel to
Osprey Drive
Redesign approved by RWQCB, ACWD,
ACFCD and other agencies
7 Approve the First Addendum of the EWC Final EIR for
Quarry Lakes Parkway, Phases 1-4
Other Roadway Changes
• Removed street connection
• ANR/Lotus Pond Intersection Mod New multiuse trails along 7 th
Street and Mission Blvd
Foothill
Glen
8 Line M
• Proposed Bypass Pipeline reduced to an Overflow Pipeline • Revised locations for Water Quality Treatment & Hydromod Basins • Construct 3-foot weir at the downstream end of OAC for Hydromod • Combined locations of outfall pipelines into OAC
Drainage Infrastructure Changes
9 Proposed Biological Offsite Mitigation
Location of the High Value
Mitigation Site in
Livermore Foothills (north
of I-580) within Alameda
Creek Watershed
Manning Ranch (Eagle Ridge Preserve) and
Cayetano Creek borders the counties of
Alameda and Contra Costa
10 Proposed Biological Offsite Mitigation
(Manning Ranch and Cayetano Creek)
Create Wetlands
Areas
Create Grassland
Habitat
Creek
Restoration
11 Proposed Biological Offsite Mitigation
• The First Addendum will
address the proposed
biological offsite mitigation
identified in the Habitat
Mitigation and Monitoring
Plan dated April 2026
• Rocky Ridge, LLC owner
and developer of high value
mitigation area
12 • The Proposed Resolution contains all the finding
necessary for approval of the First Addendum to the East West Connector Final EIR for Quarry Lakes Parkway,
Phases 1-4
• Approval of the First Addendum will allow the City to proceed with obtaining approvals from the regulatory
agencies necessary to advance the construction of Quarry Lakes Parkway, Phases 1 and 2 and enter into an
Agreement with Rocky Ridge, LLC for offsite mitigation.
Approve the First Addendum of the EWC Final EIR
for Quarry Lakes Parkway, Phases 1- 4
13 Approve the First Addendum of the EWC Final EIR
for the Quarry Lakes Parkway, Phases (Segments) 1-4
Staff Recommendation
Adopt a Resolution Approving the First
Addendum to the Certified East West Connector
Final Environmental Impact Report for Quarry
Lakes Parkway-Phases (Segments) 1-4, City
Project No. 18-04
Questions?