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  CCCSD Collection System Operations FacilityCCCSD Collection System Operations Facility


Calpo Hom & Dong Architects
2120 20th Street, #1, Sacramento, CA 95818

General Description

Location: Walnut Creek, California
LEED® Gold Pending
Date Bid: Oct 2009 Construction Period: Feb 2010 to Feb 2012
Total Square Feet: 30,108* Site: 4.74 acres. Number of Buildings: One.
Building Size: First floor, 11,441; mezzanines, 1,430; second floor, 11,378; covered loading/unloading area, 4,410; covered material bins/storage, 1,449; total, 30,108*.
Building Height: First floor, 20’; mezzanines, 10’; second floor, 14’6"; covered loading/unloading, 32’; covered material bins/storage, 24’; floor to floor, 20’; penthouse/mechanical screen, 8’6”; total, 43’.
Basic Construction Type: New/Structural Steel/Concrete/Tie.
Foundation: Cast-in-place, pier & grade beam, reinforced, slab-on-grade. Exterior Walls: Cast-in-place, precast, curtainwall, metal siding. Roof: SBS membrane, SBS garden membrane, tapered insulation, metal. Floors: Concrete, structural steel, metal deck. Interior Walls: Concrete, metal stud drywall.

Construction Team

Structural Engineer: Buehler & Buehler Structural Engineers - 600 Q Street, #200, Sacramento, CA 95811
General Contractor: Bobo Construction, Inc. - 9728 Kent Street, Elk Grove, CA 95624
Mechanical Engineer: Sigma Engineering - 3517 Marconi Avenue #204, Sacramento, CA 95821
Electrical Engineer: Capitol City Design - 1751 Cebrian Street, West Sacramento, CA 95691
Cost Estimator: Bleckmann Construction Estimating - 2421 Rio Bravo Circle, Sacramento, CA 95826
Civil Engineer & Landscape Architect: RBF Consulting - 500 Ygnacio Valley Road, Walnut Creek, CA 94596

The Central Contra Costa Sanitary District (CCCSD) was formed in 1946, and currently serves a 146 mile area of Contra Costa County, in Northern California. Centrally located within the District, is the Collection System Operations (CSO) Department, responsible for the cleaning, maintenance, and repair of the District's 1,500 miles of underground pipeline.

The original CSO Facility was constructed in 1956. The 5.15 acre site, with a 70-foot elevation change, is bounded by the I-680/24 Highway Interchange, the Bay Area Rapid Transit (BART) District, and by Springbrook Road, a public street leading to a residential area. Overhead High Voltage transmission lines bisect the site east-to-west.

The facility includes Crew Operations, Warehousing, Administration, Training, and Lockers and Showers. The Secure Site includes Vehicle Storage, Covered Material Bins and Loading Area, Yard Storage, Fueling Stations, and Training areas. A separate, existing Vehicle Maintenance Facility shares the site. The original facilities no longer met the operational, spatial, and technological needs of the District and the CSO Department. A new CSO Facility was designed to accommodate present and future operations and technology needs, improved site circulation, training facilities, site storage, and a Secondary Emergency Operations Center (EOC) for the District.

The new CSO Facility consolidates the Crews, Administration, and Warehousing in a single, two-story building. Due to the topography of the site, the yard is divided into Lower, Middle, and Upper Yards; the new CSO Facility is nestled into the hillside separating the Lower and Middle Yards. A central Second Floor Crew Room, which also serves as Training Rooms and EOC, with adjoining Kitchen, provides a gathering place for the Crews to plan and collaborate on their daily work schedules, and opens onto the Middle Yard. Adjacent to the Crew Room are separate Workrooms for the Construction and Cleaning Crews, and the Technical Services support areas. Mud Rooms, Locker Rooms, and Showers are provided for the Crews returning at the end of the day. Administration Offices and the Warehouse are located on the First Floor, and opens onto the Lower Yard. Public Entry is situated mid-level between the two floors, due to the topography.

The CSO Facility utilizes a concrete slab with drilled pier and pad foundations, a 20-foot high Tie-Back Retaining Wall to retain the hillside, and structural steel framing with concrete and metal decks. Concrete Wall Panels envelope the Warehouse area. Roofing is a reflective SBS Membrane Roofing, with Metal Sunshades. The metal exterior cladding with the curtain wall and concrete invoke the clean lines of the building.

The CSO Facility is LEED-registered, and is pursuing LEED-Gold. Environment and Energy Planning includes High-Efficient HVAC Equipment, Hydronic Floor Heating and Low-Velocity Fan, Low-Flow Plumbing Fixtures, Site Stormwater Filtration through Pervious Pavement, Bio-Swales, and a Roof Garden. Windows are abundant throughout, with exterior Sunshades, and an automated interior Shading System, to provide views and daylighting, and are complimented by Energy-Efficient Light Fixtures, with motion sensors. Polished Concrete Floors and Recycled Countertops are used throughout the facility, and Low-emitting Materials on all interior finishes.

LEED® Points Achieved         42 Total
Sustainable Sites                    8
Water Efficiency                   3
Energy & Atmosphere             7
Materials & Resources             8
Indoor Environmental Quality  14
Innovation & Design Process    2

Product Information
Metal Siding: Metal Sales Roof: Soprema, Metal Sales
Curatin wall, Entrances & Storefronts:
US Aluminum
Daylighting/Skylights: Solatube Flooring: Bentley Carpet Tile, Retroplate Polished Concrete
Gypsum: National Paint: Dunn-Edwards Lighting: Daybrite, Williams Finelite, Emergilite   Elevator: ThyssenKrupp


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