The design of Taylor Yard Village encourages mode-shift in all of its details – with strong, safe pedestrian connections between homes and the other amenities in the community, with access to bike and walking trails, and, ultimately, with access to the region through Metro’s transit system.
The Taylor Yard Transit Village project presented unique stormwater retention and treatment challenges due to the project’s close proximity to the Los Angeles River and the complexities with regards to its history as a rail yard. We needed to meet local stormwater retention sizing requirements while maximizing the green open space available to the community. The City of Los Angeles promotes Low Impact Development (LID) design so we evaluated infiltration/ground water recharge to meet the stormwater regulations first, however infiltration was not a viable option for some portions of the site, therefore it was determined that rainwater harvesting would be utilized to retain the water onsite. This had the long term benefit of reducing the potable water demand for the site’s drip irrigation system, which is especially beneficial in light of the current drought conditions in the region.
Ultimately, we designed a unique hybrid rainwater harvesting/detention system with pretreatment and overflow treatment. A rainwater harvesting system was installed beneath an open space park on-site that includes a 120-inch diameter steel reinforced polyethylene cistern that is designed to hold 168,300 gallons of harvested rainwater. A second watertight 144-inch diameter aluminized metal pipe cistern with a watertight coating that holds 36,375 gallons of water was installed beneath the adjacent open space park. The harvested rain water will be used for drip irrigation on-site. Both systems have pretreatment units that remove sediment, trash, oil, and grease from stormwater runoff.
If the cistern and detention system became full, water overflows to the peak diversion storm filter where it receives polishing treatment before discharging to the public storm drain system. The system works by passing polluted stormwater runoff through filter cartridges designed to remove trash, sediment, oil, nutrients and heavy metals from stormwater runoff.
The rainwater harvesting system was designed to irrigate roughly 50,000 square feet of landscaping and save more than 248,650 gallons of potable water per year.
The Taylor Yard Transit Village is a LEED-Neighborhood Development pilot program which integrates the principles of smart growth, urbanism and green building into the first national system for neighborhood design. The program emphasizes elements that bring buildings and infrastructure together and relates the neighborhood to its local and regional landscape.
Eugene Lee, Chief of the California Department of Housing and Community Development (HCD) was impressed with what the team accomplished. He said he is going to promote this project as a “showcase” for what HCD wants included in future publicly-funded housing projects in California. |