September 13, 2019by The Conco Companies

Three Mat Pours Blog Photo Collage - The Conco Companies

Saturday, August 24th was not your typical day for Conco.  While many projects are shutdown for the weekend, this Saturday was one of the busiest Saturdays in Conco’s 60-year history.

The activity began Friday evening in Southern California.  Starting at 9:30 PM, Conco began to pump, place, and finish 10,400 cubic yards in downtown Los Angeles on a project known as The Grand.  The Grand is a mixed-use project with retail, residential and a hotel across the street from the Disney Concert Hall.  The developers for The Grand are The Related Cos. and CORE USA for this Frank Gehry designed structure.

The Grand Concrete Pour

The Grand 10,400 concrete pour was the second of three foundation pours for the structure. Eight concrete pumps were positioned around the foundation to receive concrete at the scheduled delivery rate of 750 cubic yards per hour.  In order to supply concrete at this rate, Calportland, with the assistance of Associated Concrete, utilized five batch plants and over 120 concrete mixer trucks.


In addition to the work performed on The Grand, Conco had another large concrete pour on this day in downtown Oakland, CA.  Working for the Holland Partner Group, the project located at 24th & Harrison, site of the old Acura dealership, will comprise of luxury apartments with retail and other amenities.

Before placing the concrete, Conco was responsible for fabricating and installing all the rebar.  Comprised of mainly #11 bar, more than 4.1 million pounds were needed for the entire mat foundation.

24th & Harrison Concrete Pour

The 24th & Harrison project by the Holland Group was the second of two foundation pours at the site, requiring 7,300 cubic yards of concrete supplied by Central Concrete out of five concrete batch plants. Prior to pouring the concrete, Conco provided the fabricated rebar and installation. The challenging site necessitated that six concrete pumps (five were active at any given time) be used with a scheduled delivery rate of 600 cubic yards per hour being delivered by 120 concrete mixer trucks.  The concrete pour began at 1:00 AM.

950 Market Street Concrete Pour

Furthermore, in addition to the Los Angeles and Oakland pours, a mat foundation pour also took place simultaneously in San Francisco, CA.  The project at 950 Market Street will be a mixed-use development consisting of housing, a hotel, retail, and a dedicated non-profit space.  This project is being developed by Group i, a San Francisco-based real estate development company.  Working for the general contractor, Pankow Builders, Conco also fabricated and installed the rebar for the foundation.  More than 1.7 million pounds were needed to be put in place prior to concrete placement for the entire foundation.

The mat pour for the 950 Market Street project was the first of two for the site and was supplied by CEMEX out of three concrete plants. A total of 3,195 yards of concrete was pumped, placed and finished by Conco through three concrete pumps that were supplied at a scheduled rate of 300 cubic yards per hour.

For the activity in three separate markets to transpire, multiple internal and external meetings were held to discuss every facet of activity associated with making each concrete pour a success.  For Conco, success comes from developing the proper plan and executing that plan.  Items such as safety, concrete mix designs, pump placement, street closures, individual company responsibilities, and contingencies are just a few of the details that must seamlessly be ironed out.

The resources that were used and vital statistics for Saturday, August 24, 2019 were:

The Grand
Los Angeles
24 & Harrison
950 Market
San Francisco
Concrete Placed 10,400 7,300 3,195 20,895
Concrete YPH Placed 750 600 300 1,650
Square Feet Finished 41,000 44,800 18,000 103,800
Mixer Trucks Used 120 140 60 220

With the combined effort of Conco, our customers and suppliers, all three projects finished on time with only 5 extra yards of concrete for all three projects combined.   More importantly, all were completed without so much as a first aid claim.

Large mat foundation pours require extensive planning and collaboration with customers, suppliers, public agencies and various other third parties.  Conco’s success is dependent on everyone doing their part and we at Conco are thankful to work with great customers and suppliers day in and day out, who give us the opportunity to succeed.


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