LOCATION			San Francisco, CA
START DATE			June 2002
COMPLETION DATE			June 2003
CONTRACT			$7,661,944
ARCHITECT			GEZ Architects Engineers
OWNER				Norcal Waste Systems

Nibbi Brothers is proud to be building Norcal Waste Systems’ new integrated Material Recovery Facility (iMRF), which will house all operations of this complex, innovative recycling facility. The 45,000 SF steel frame building which is being erected over the existing sort line, will allow enough space to house second a state-of-the-art sorting line. These two sorting lines will expedite the separation and recycling of all usable waste that comes out of San Francisco. Other features of the iMRF include an organic waste separator and a wood recyclable hopper. The organic waste, collected from 1,500 restaurants and households in San Francisco, is used to make compost, which is then sold to area farms, nurseries and vineyards. The wood hopper diverts wood products before they are taken to another site for processing. These operations are all part of the state's goal of recycling 50 percent of the garbage that would otherwise end up in landfill.

This project included challenging site conditions. The site is on a sloped hill which had to be cleared and graded. Nibbi Brothers cut into the hillside which consisted of mostly hard rock. We then excavated approximately 12 feet of T-footing before forming and pouring a 3-ft. thick, 27-ft. high concrete retaining wall was poured in order to support the new slab and building. In addition to providing support for the facility, the retaining wall allowed NorCal to double the size of their usable building pad.

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