References

Weholite Rainwater Harvest System at Los Angeles Federal Courthouse, United States

Weholite Rainwater Harvest System at Los Angeles Federal Courthouse, United States

Los Angeles (LA) has experienced four years of statewide drought following which large scale rainwater harvest systems are being utilized to address growing water scarcity and to meet the LA Department of Water and Power’s  “Stormwater Capture Master Plan.”

Reference report as PDF

Project:

Los Angeles (LA) has experienced four years of statewide drought following which large scale rainwater harvest systems are being utilized to address growing water scarcity and to meet the LA Department of Water and Power’s  “Stormwater Capture Master Plan.”

Challenge:

As a General Services Administration (GSA) Design Excellence Project, sustainability was a key element of the project's design. The LA Federal Court House project sought to achieve Leadership in Energy and Environmental Design (LEED) platinum certification and lead the industry by providing an environmentally friendly project to address potentially severe water scarcity challenges.

The New Los Angeles Federal Courthouse is located at 107 South Broadway in the center of downtown Los Angeles.  The new building occupies the majority of the available site and space for an underground rainwater storage system was limited to a 170-foot long by 60-foot wide area at the corner of Broadway and West First Street. Underground storage vessels are soil-structure interaction systems that rely upon uniform soil loading. Because the rainwater system was planned to be situated snuggly between the building and the existing road, the system’s layout needed to account for both the horizontal site constraints and the vertical zone of influence associated with the building’s foundation loads.

Site logistics, staging, excavation and backfill considerations were also factored into the system’s design.  With the new building expected to be in place at time of delivery, there was extremely limited room to store excavated soil, select backfill, or the system itself.

Project Information

Country
USA

Website

Completion
2015

Project Type
Renovation

Size
106,000 Gallons of Rainwater Storage, 150 LF of 11-foot Diameter Weholite Cistern, 19-foot Deep Vertical Pump Station, Hydrodynamic Primary Pre-filtration, Integral Filtration Riser, 100 Micron Post Filtration, Variable Frequency Drive Pump, Human Machine Interface Control Panel

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