TR 53430 Development Project

Update: January 2018

This project is currently on hold until the property owner fully complies with all regional, state and federal agency permitting requirements.

For questions, contact the Community Development Department at (909) 839-7030

Commonly referred to as the “Millennium Development”

The City has received a number of calls and concerns regarding activity which has taken place on undeveloped property within the gated community of the Country Estates. This report, dated February 6, 2018, provides a status of the project.

The project was approved in 2006, but for various reasons did not go forward. The project developer, Millennium Diamond-Road Partners, LLC and Hua Quing Enterprises, LLC, ("Developer") received approval of their Final Map for the development on May 3, 2016. The Final Map approval permitted the Developer to go forward with project development provided it complied with certain conditions. The project consists of 48 single family lots and two common area lots (Lots A and B) within the gated community of the Country Estates. The lettered Lot A has been designated as privately maintained slopes, drainage devices and a sewer lift station. The lettered Lot B has been designated for emergency access roadway purposes. It is the intent of the Developer to create a separate homeowners association within the development to own, operate and maintain the facilities within the two Lettered Lots as well as the overall storm drain and sewer facilities, and roadways within the development.

On December 14, 2017 the Rough Grading and Storm Drain Improvement permits were released to the Developer. On December 15, 2017 the Sewer and Street Improvement permits were released to the Developer. The release of the permits entitled the Developer to begin these construction activities.

The approved grading plans authorize significant grading activities to take place on the site, specifically, 3.9 million cubic yards of cut and 3.9 million cubic yards of fill. Once commenced, rough grading and major storm drain construction activities are expected to take approximately 6-8 months.

Between Friday, December 22 and Wednesday, December 27, 2017, the Developer commenced vegetation removal (“clearing and grubbing”). However, it was determined by the City that the Developer had not met all pre-requisites for doing so, which requirements included having an archaeologist and biologist on site during this activity and implementation of the Stormwater Pollution Prevention Plan (SWPPP) to eliminate or minimize silt and sediment runoff from the development during storm events. Upon discovery that the Developer had not met all the pre-requisites for the clearing and grubbing, the City ordered all clearing and grubbing work to immediately cease and that the SWPPP be implemented and that an archaeologist and biologist be on site. The Developer ceased the clearing and grubbing work and begin implementation of the SWPPP.

In addition to the City of Diamond Bar, the site is subject to permits/approvals and enforcement by the following Agencies:

  • U.S. Army Corps of Engineers (USACE)
    Inquiries and complaints may be directed to: Shannon Pankratz at 
  • California Department of Fish and Wildlife (CDFW)
    Inquiries and complaints may be directed to: Erinn Wilson, Senior Environmental Scientist, at (562) 342-7172 or 
  • South Coast Air Quality Management District (SCAQMD) 
    Air quality related-inquiries and complaints may be directed: (800) 288-7664 or
  • Los Angeles Regional Water Quality Control Board (LARWQCB)
    Inquiries and complaints may be directed to: (213) 620-6370 or (213) 576-6600

As of the date of grading permit issuance, the Developer had a Streambed Alteration Agreement (SAA) from the CDFW to alter the tributaries to Tonner Canyon Creek to accommodate the development of the Millennium Development. CDFW was apprised by the City of the Developer's activities and has inspected the site. The SAA authorized the removal of riparian habitat, including several oak trees, within the project’s grading limits, as shown in the Jurisdictional Map. Some of those oak trees were removed during the clearing and grubbing activities that occurred between December 22 and December 27, 2017. The SAA expired on December 31, 2017. The Developer may submit a new SAA in conjunction with the other remediation measures mandated by the CDFW.

The City is currently working with the regional, state and federal agencies to ensure that the Developer fully complies with all agency permitting requirements prior to allowing further construction activity to commence.

Millennium Project: Vicinity Map

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Millennium Project: Index Map

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