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Revised Platinum Triangle Expansion Project

The City of Anaheim is the Lead Agency responsible for preparing Draft Subsequent Environmental Impact Report No. 339 (DSEIR No. 339) to analyze the impacts of increased development intensities in the Platinum Triangle.  The Platinum Triangle consists of approximately 820 acres in the City of Anaheim (“City”) in Orange County, California and is located generally east of I-5, west of the Santa Ana River channel and SR 57, south of the Southern California Edison easement, and north of the City limit.  The Platinum Triangle encompasses Angel Stadium of Anaheim, the Honda Center, and The Grove of Anaheim; the surrounding light industrial buildings, industrial parks, distribution facilities, offices, hotels, restaurants and supporting retail uses; and, several mixed-use and residential developments in various stages of entitlement and construction.


The proposed project (the “Revised Platinum Triangle Expansion Project”) includes a General Plan Amendment, amendments to the Platinum Triangle Master Land Use Plan (MLUP) and Platinum Triangle Mixed Use (PTMU) Overlay Zone and Zoning reclassifications to expand the boundaries of the PTMU Overlay Zone and increase permitted residential, office, commercial and institutional development intensities within the PTMU Overlay Zone as indicated in the table below:

Proposed Development Intensities in The Platinum Triangle PTMU Overlay Zone

Land Use




Residential Units




Commercial Square Feet




Office Square Feet




Institutional Square Feet




 In 2007 the City embarked upon a process to increase the development intensities within the Platinum Triangle to up to 18,363 residential units; 5,657,847 square feet of commercial uses; 16,819,015 square feet of office uses; and 1,500,000 square feet of institutional uses (the “Platinum Triangle Expansion Project”).  The City prepared and approved an environmental impact report (FSEIR No. 334) in connection with this project.  However, following the project’s approval, a lawsuit was filed challenging the adequacy of FSEIR No. 334.  In October 2008, City Council repealed the approval of FSEIR No. 334 and the Platinum Triangle Expansion Project and directed staff to prepare a new EIR.  The City took this direction because the City has very rarely been challenged based on alleged non-compliance with CEQA, and because the City desired to assuage any concerns held by the public concerning the adequacy of FSEIR No. 334.

In comparison to the Platinum Triangle Expansion Project analyzed by FSEIR No. 334, the new Revised Platinum Triangle Expansion Project has reduced the proposed maximum amount of office development by nearly 2.5 million square feet and the amount of commercial development by almost 750,000 square feet and increased the amount of residential development by 546 units. 


The proposed project includes upgrades to existing infrastructure to serve the proposed increased intensity of land uses.  These upgrades include roadway improvements, sewer upgrades, two new water wells, a new electrical substation, natural gas infrastructure improvements and an additional fire station.


A Notice of Availability (NOA) for DSEIR 339 was distributed on August 12, 2010 to Trustee Agencies, the State Clearinghouse and parties that had requested such information (“interested parties”).  The NOA was published in the Orange County Register on August 13, 2010.  The public review period for DSEIR ends on September 27, 2010 at 5:00 p.m.  A public hearing before the Anaheim Planning Commission is scheduled for October 11, 2010 at 5:00 p.m. and tentatively scheduled before the City Council for November 9, 2010 at 5:30 p.m.  Both public hearings will be held in the Anaheim City Council Chamber, 200 South Anaheim Boulevard, Anaheim.

For additional information, please contact Susan Kim at (714) 765-4958 or

Document Links:

The Revised Platinum Triangle Expansion Project Subsequent Environmental Impact Report No. 339 (SCH#2004121045)

Platinum Triangle Web Page