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November 30, 2023by The Conco Companies

SACRAMENTO, CALIFORNIA – The American River Bridge on the Capital City Freeway connects commuters to medical centers, employment opportunities, and activity hubs in downtown and eastern Sacramento. This multi-span, 1.5-mile bridge was constructed in 1954 and widened in 1965 to six 12-foot northbound and southbound lanes, with minimal inside and outside shoulders.

  

Today, the bridge has a deteriorated concrete deck that is in need of repair and in need of additional lanes to allow pedestrians to cross the American River. Because of this, the California Department of Transportation (Caltrans) spearheaded a $200 million bridge rehabilitation project that includes removing and replacing the existing concrete deck, widening the bridge, and adding a bike and pedestrian path.

Construction began in 2022 and is expected to be completed in 2026. Conco Pumping began working with American River Construction (ARC) to pour the four piers for the bridge that are located in the American River in late 2022 and expects to begin pouring the new deck in late 2023 or early 2024.

 A difficult setup

Due to financial considerations, the project required ARC to install floating work platforms, or barges, to facilitate construction activities within the river. To accommodate this unusual setup, ARC selected Conco Pumping as their concrete pumping contractor. Conco chose two Putzmeister boom pumps for this complicated project: the 39Z-Meter truck-mounted concrete boom pump and 38Z and 36M placing booms that were used in different phases of the job.

ARC and Conco set up the Putzmeister placing boom equipment on a barge and pumped across a 700-foot gangway built between coffer dams from a trussell with a 39Z boom truck equipped with Putzmeister’s high performance pump kit. The 39Z is equipped with the 13 HPD pump kit and was chosen due to its robust design to withstand high-pressure high-rise job site conditions, as well as long-distance pumping that was required for this project.

A close partnership

ARC engineers collaborated with Putzmeister’s engineering department to design and implement a specialized setup, attaching the placing boom to the barge. Once Conco and ARC received confirmation that the plan was viable, it took approximately six days to construct and set up the equipment on the custom-made framework on the barge.

Another challenge faced by Conco and ARC involved building around 700 feet of pipeline to facilitate the concrete pumping from the trussell to four different pier locations. Con Forms provided a delivery line comprising a robust 5-inch, 0.25-inch thick pipe, heat-treated for a high-pressure rating and low wear resistance. Con Forms also supplied all the necessary clamps, hold-down brackets, and diverter valves required to couple and anchor the delivery line to the trussell and gangway, connecting the concrete pump to the placing boom.

Concrete Pours

The Conco ARC team successfully executed three pours for each of the four piers. The initial pour involved a 150-yard slurry seal at the base of the coffer dam, facilitating dewatering and creating a dry area for footing construction. The second pour comprised an 180-yard footing application. The third and final pour necessitated approximately 350 yards of concrete for the pier wall, executed at a continuous rate of around 30 yards per hour over 12 hours starting at 1 am to achieve a consistent flow of ready mix. Undertaking the work during the nocturnal hours capitalized on lower temperatures, thereby reducing the concrete’s set time within the pipeline.



October 30, 2023by The Conco Companies

We are thrilled to announce that Conco, has been honored with the UCON Safety REAL Award in the 1,000,000+ man hours category. This recognition highlights our unwavering dedication to promoting a culture of safety, awareness, and leadership within our organization. We are incredibly proud to receive this esteemed award and would like to express our sincere gratitude to the UCON Safety Committee for this recognition.

Safety First Safety Always: At Conco, safety is at the core of everything we do. We firmly believe that every employee deserves to work in a safe and secure environment. This belief has driven us to implement comprehensive safety measures, ensuring that the well-being of our employees remains our top priority.

Looking Towards the Future: As we celebrate the UCON Safety REAL Award, we are reminded that our journey towards safety excellence is an ongoing process. We remain steadfast in our commitment to continually improve our safety practices and raise awareness within our organization. By doing so, we aim to set new benchmarks and drive a positive safety culture not just within Conco, but also as an example for the industry as a whole.

UCON Safety Award 2023 

UCON Safety Award 2023



September 19, 2023by The Conco Companies

Conco is Pre-Qualified with Hoop Welding for Caltrans, a process which can take up to a year to achieve through many stringent testing criteria.  Conco has invested in the time, people, and the proper equipment to meet this qualification process for Caltrans and a lot more.

With Conco Reinforcing at our Benicia Rebar fabrication shop and Rail yard facility now being able to meet the Caltrans criteria, we are fabricating welded hoops. 

  An Example of this is the current Caltrans Project 01 – 366004 Eureka Slough.  This Project consists of 120 caissons (Piers drilled into the ground, filled with welded rebar hoops, vertical rebar, and concrete).  Depending on varying depths and widths each caisson can contain 300 or more certified welded Rebar hoops.  There are around 18,000 Certified welded rebar hoops on this job alone.

This added Caltrans welding certification along with the newly renovated Benicia Reinforcing facility has increased the capability to diversify what Conco is now able to do in its Pre-fabrication yard with its outdoor overhead cranes.  With Conco’s Hoop welding equipment 1 operator can weld up to 250 Certified hoops in one shift.  Conco currently has over 34,000 hoop welds on the books. 

We are thankful for the investment from Conco’s management and the hard work of the employees at our Benicia Facility that made this possible to be a pre-qualified hoop welding facility. We look forward to continuing to meet the industry demands along with a high quality of service. (YouTube VIDEO)


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Heat Illness Prevention

Every summer we encounter heat exhaustion that can sometimes keep our workers out of commission for hours or even days.  In preparation for the coming summer heat, two portable cooling stations have been procured in our Southern CA region.  These cooling stations have an oscillating mist blown that, according to our field crew, “helps recharge your energy with only a few minutes [of exposure]”.  We are hopeful this, in addition to shade and water, will aid in avoiding such negative heat-related experiences, thereby providing an overall better experience for our workforce!

 

 

 

 

 

 

 

 

 

 

 

Daniel Varelas seen in the picture above, receiving a brief cooldown before continuing his work on

the structure foundations at the USC Pasadena Medical Office Building.


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Conco is currently working on THE CONFIDENTIAL: a 29 story, cast in place tower in Seattle’s Belltown neighborhood. Partnering with Exxel Pacific as the General Contractor, Conco is helping to bring this mixed-use building to completion by providing concrete pumping and placing, shotcrete and reinforcing. With over 22,000 CY of concrete planned to be poured, we anticipate topping out the tower in November of 2023. This project will demand over 4 million pounds of rebar that we will fabricate at our state-of-the-art rebar facility in Rochester, WA. In the end, THE CONFIDENTIAL will contain 375,000 square feet of deck and we are thankful to RPM for their support on the rebar installation and Cadman for their readymix supply.

As noted by Superintendent Bill Lessard, “This crew came off of what could be called a mega project at Building X (a Facebook project) so it’s kind of nice to get back to the basics of a rinse and repeat tower while they’re still firing on all cylinders.  It’s a great crew, the core of which have been together 8 years. It’s always a privilege and a pleasure to be charged with such a competent crew who work so well together”.  This is the third tower project for Bill with Conco, and the whole team benefits from his expertise.

   

 Left: Spencer Jones (Carpenter), installing elevator embeds. Right: Jon Estrada (Carpenter) and Desmond Upulasi (Laborer), pouring columns. Photos by Jacob Christian, General Foreman.

THE CONFIDENTIAL, inspired by the work-from-home impacts of the pandemic, will feature larger units that have dedicated workspaces. Most units will also have a balcony for outside space. This unique approach will result in less occupants of the building and the hope is that it will encourage a sense of community amongst the residents. Developed by Security Properties, this project will contain four levels of below-grade parking in addition to the 29 levels of mixed use above; including commercial/retail, additional parking, office, residential and amenity levels. This building is sure to be a fantastic addition to the Belltown neighborhood and Conco looks forward to this next project with Exxel Pacific!


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