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  • Home
  • About Us
    • Mission
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    • Board of Directors & Staff
    • Gratitudes
    • Yorba Linda Defense
    • Videos
    • Contact Us
  • Projects
    • Active Threats
      • Brea Canyon Road Widening
      • Esperanza Hills
      • Hidden Oaks
      • Hsi Lai Monastery Expansion
      • Olinda Landfill Expansion
      • Prado Raceway
    • Sidelined Threats
      • Shell-Aera
      • Tonner Canyon
      • 91 Freeway
      • Pacific Heights
    • Resolved Threats
      • Carbon Creek Restoration
      • Cielo Vista
      • Edison Settlement
      • Edison’s TRTP
      • Madrona
      • National Monument Designation
      • Whittier Oil Drilling
  • Donate
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    • Magazines
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      • Mammal Studies
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      • Corridor Studies
      • Herpetofauna & Amphibian Studies
      • Wildfire Studies
        • Updated Fire Study
        • 2012 Fire Study
      • Other Studies
    • Archived News
    • Email Newsletter Archive
  • Visitor’s Guide
    • Chino Hills State Park
      • Discovery Center
      • Access
      • Recreation
      • Trail Map (PDF)
    • Puente Hills Preserve
      • Access
      • Recreation
      • Trail Map (PDF)
  • The Corridor
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    • Saving Open Space
    • Acquisitions
  • Get Involved
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    • Write a Letter to the Editor
    • Contact Elected Officials

Active Threats

Brea Canyon Rd. Widening

Brea Canyon Rd. Widening

by Melanie Schlotterbeck on November 10, 2020 with No Comments

See the proposal to widen Brea Canyon Road above Brea Blvd./Central from two lanes to four lanes. The project has the potential to sever the Puente-Chino Hills Wildlife Corridor if not planned and built correctly. Learn more about the Brea … Read More

Active Threats City of Brea, OC Waste and Recycling, Olinda Alpha Landfill, Olinda Landfill
Esperanza Hills

Esperanza Hills

by Melanie Schlotterbeck on November 10, 2020 with No Comments

See the proposal to fill two canyons in fire- and landslide-prone hills above Yorba Linda to make room for 340-units. Esperanza Hills abuts Chino Hills State Park and is in Orange County territory. The project proposes one access onto Stonehaven. Learn … Read More

Active Threats County of Orange, Esperanza Hills, Yorba Linda
Hidden Oaks

Hidden Oaks

by Melanie Schlotterbeck on November 10, 2020 with No Comments

The developer of the 537 acre property submitted a revised project that reduces the footprint of the project and number of units from 107 to 53. However, the site is now owned by a new developer and the new site plans … Read More

Active Threats Carbon Canyon, City of Chino Hills, Hidden Oaks
Hsi Lai Monastery Expansion

Hsi Lai Monastery Expansion

by Melanie Schlotterbeck on November 10, 2020 with No Comments

The International Buddhist Progress Society has proposed an expansion of its Hsi Lai Temple in Hacienda Heights. The project, a monastery, is being processed through the County of Los Angeles. Learn about the Hsi Lai Monastery Expansion.

Active Threats Hacienda Heights, Hsi Lai Monastery, Hsi Lai Temple, Puente Hills
Olinda Landfill

Olinda Landfill

by Melanie Schlotterbeck on November 10, 2020 with No Comments

Though set to close in 2021, the Olinda Landfill may well be extended since it has not reached capacity. The extension would only be in duration of operation, not elevation and the footprint would not be expanded. Learn more about … Read More

Active Threats Brea, OC Waste and Recycling, Olinda Landfill
Prado Raceway

Prado Raceway

by Melanie Schlotterbeck on November 10, 2020 with No Comments

An off road vehicle park has been proposed just off the 71 Freeway in Riverside County near the San Bernardino County line. Concerns have been raised with the property owner about impacts to Chino Hills State Park. Learn more about … Read More

Active Threats Chino Hills State Park, County of Riverside, Prado Raceway

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