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August 15, 2016by The Conco Companies

The Conco Companies is providing concrete services for a 40-story apartment building at 970 Denny Way located in the South Lake Union neighborhood in Seattle, Washington. The redevelopment project is from the Holland Partner Group and is a blend of both modern and classic styles. Holland Construction is serving as the general contractor and the Seattle-based architectural firm of Weber Thompson designed the contemporary style building.

Conco successfully completed part of our concrete services when our crews poured 4,900 cubic yards of concrete last month to form the 15,300 square foot mat foundation. In addition to the concrete, the foundation required 1.3 million pounds of rebar. The pour was done over approximately 15 hours and the concrete was supplied by CalPortland.

The core of the mixed-use tower will be constructed of 386 steel fiber-reinforced concrete coupling beams. Once it is completed, the project will consist of 468 apartments in a choice of unit sizes and configurations as well as 15,580 square feet of retail and 4 levels of sub-grade parking to accommodate 359 vehicles. The retail space along with a six-story podium will face Denny and features a brick exterior with steel canopies designed to represent the area’s industrial past. The tower’s curtain wall is designed almost entirely of tinted glass in tones of blue, grey and silver-white.

The project expects to receive LEED Silver certification. Amenities include a terrace and pavilion on top of the podium located on the Denny side of the building that will be covered on three sides to provide a temperature-controlled space. A lush, rooftop garden will offer views of Lake Union, the Space Needle, and Elliot Bay and serve as a gathering space for residents to dine and relax. The location of the building is within walking distance to the downtown Seattle area and transportation hubs. The building is expected to be ready for the first occupants by the summer of 2018.

Seattle Commercial Concrete - 970 Denny
Seattle Commercial Concrete Contractors - 970 Denny
Seattle Concrete Pumping - 970 Denny

At The Conco Companies, we are one of the leading concrete contractors in the Western U.S. and offer a wide range of quality services and products. Our experience includes providing services for commercial, educational, parking and other construction development as well as public works projects. We serve California, Washington State, Oregon, Colorado and Nevada.


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The Conco Companies is providing concrete services for The Mark, a 48-story high-rise tower in Seattle, WA that will consist of 528,000 sq. ft. of Class A+ office space, as well as a luxurious 189-room SLS hotel and spa. Conveniently located in the city’s central business district, the stunning beautifully designed tower will incorporate a wide range of “green” building features such as rain water management, photovoltaic glass and light pollution reduction. Scheduled for completion in April, 2017, the tower will bring to the area first-class office space that is highly divisible and offers 9’ 6” windows for natural light and spectacular views.

Concrete Pumping - The Mark

The 5,000 cubic yard mat foundation pour was completed in June, 2015 and required approximately 500 truckloads of concrete over the course of the day. The project also includes a sub-level parking structure comprised of shotcrete perimeter walls and a concrete elevator core. As of May 2016, Levels 5-11 decks have been poured and the core poured to Level 35. When the elevator core reaches Level 35, the remainder of the building steel will be erected in one continuous phase.

The building’s unique geometric facade provides exterior seismic bracing for structural safety as well as column-free floor plates. Unobstructed by columns or bracing, the 13’ 6” floor-to-floor heights will allow for individualized, open plans or heavy build-outs. The Mark is seeking LEED Gold Certification.  

The SLS hotel will be a collaborative effort from the Founder and CEO Sam Nazarian, renowned designer Philippe Starck, and chef James Beard. The hotel will also include 15,000 sq. ft. of meeting space, a 5,000 sq. ft. ballroom, sky lounge and two restaurants. Adjacent to the SLS Hotel are two historic buildings. A century-old sanctuary building, the First United Methodist Church, and the Rainier Club. Founded in 1888, the Rainer Club has occupied their current building since 1904.

Additional information is available at http://www.themarkseattle.com/.

The Conco Companies - The Mark
5th & Columbia Washington Concrete

The Conco Companies is one of the foremost suppliers of concrete services for the Western U.S. We began operations in 1959 in the Bay Area by offering clients the best value on a broad range of concrete services and products. Since that time, we have taken a leading role as top concrete contractors in the region. We have four regional offices serving California, Oregon, Nevada, Colorado and Washington.


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The Conco Companies bring vast concrete services experience to the Kinects Tower, a new mixed-use 41-story high-rise under construction in the Denny Triangle area of Seattle, WA.  The project is designed by Bumgardner, a Seattle based architectural firm and developed by Security Properties. Once complete, the 500,000 sq. ft. high-rise tower will consist of 356 multi-family units varying from studios to luxury penthouse suites located on the top two floors as well as 4,658 sq. ft. of retail space on the ground level.  The completion is scheduled for 2017.

Conco will be constructing four levels of below grade parking and five levels above to provide the building with 316 parking stalls.  Working 16 hours straight, we recently completed the 6,000 cubic yard concrete mat pour.  Due to our detailed pre-planning and highly experienced management, the pour was a very routine event, which was exactly the result we wanted.

Furthermore, we are proud to report that we received positive feedback from the City of Seattle’s DOT.  They have told us this was the best-coordinated and smoothest run mat pour that they can remember.  During the course of the project, Conco will place 30,470 cubic yards of concrete, 3,106 tons of rebar and 671,500 ft. of PT cable.

Bumgardner explains that the 440 ft. tall tower was designed to serve as a “highly visible gateway to downtown Seattle, and will reconnect the Capitol Hill neighborhood to downtown with a strong street level presence.”  The building’s unique shape of three sides sloping outward means it will have more square footage on the upper levels than below.  In addition the Tower will feature a rooftop swimming pool, lounge and observation deck.

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The-Kinects-Tower-Pour-The-Conco-Companies

The Conco Companies are a leading supplier of concrete services for the Western U.S. and  was started in the Bay Area in 1959 by offering clients the best value on a wide range of concrete services and products.  Since that time, we have taken a leading role as one of the top concrete contractors in the region. We currently serve California, Washington, Oregon, Nevada and Colorado.


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On March 13th, the Local 433 Steel and 416 Rebar Ironworkers celebrated the “topping out” of the U.S. Federal Courthouse that is currently under construction in Downtown Los Angeles. The steel erection of the final two levels started in February, and according to Clark Construction, who is providing the design-build services on the project, presented “some of the more complicated assembly requirements.” The Conco Companies are providing various concrete services for the project.

The Conco Companies New Los Angeles Federal Courthouse Steel Topping Out The Cube

Known as the “Cube” for its unique shape, the $400 million project will be one of the safest buildings in terms of bomb threats or earthquakes with an innovative design that permits the cubic volume to “float” over a stone base. The project broke ground on August 2013 and is scheduled for completion in 2016. Located on a 3.6-acre site, the 10-story courthouse will include 24 courtrooms and 32 chambers for judges as well as housing district judges, jury assembly facilities, and offices for the U.S. Marshals.

The Conco Companies New Los Angeles Federal Courthouse Steel Topping Out

The project has already earned a Green Good Design award for Green Architecture in 2014. The nomination was submitted by the building’s architect, Skidmore, Owings & Merrill, LLP (SOM). Designed to earn LEED Platinum certification, SOM included numerous sustainable features such as “a serrated façade that reduces solar heat gain by nearly fifty percent and a sky-lit central courtyard at the structure’s core, which will provide natural light and circulation to the building’s interior spaces.” Furthermore, the courthouse is designed with water and electricity conservation strategies as well as a roof-mounted 400 kilowatt photovoltaic array.

The 630,000 GSF building will also have one level of below-grade parking. In addition seismic design was a part of the structural engineering process because of the building’s location. SOM designed and engineered a state-of-the-art roof truss system to control lateral drifts.

Additional Photos:

The Conco Companies New Los Angeles Federal Courthouse Steel Topping Out 2
The Conco Companies New Los Angeles Federal Courthouse Steel Topping Out Employees
The Conco Companies New Los Angeles Federal Courthouse Steel Topping Out Group Shot
The Conco Companies New Los Angeles Federal Courthouse Steel Topping Out Employee Signatures 2
The Conco Companies New Los Angeles Federal Courthouse Steel Topping Out Employee Signatures

When your project demands exceptional services and the best value, Conco can deliver. We have been offering premium concrete services throughout the Western U.S. since 1959, and have four region offices serving California, Oregon, Washington, Nevada and Colorado. With state-of-the-art equipment and modern facilities, we work diligently to meet goals and stay within budget.


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The Conco Companies are currently providing concrete services for the new 6-story Stadium Tech Center, in Santa Clara, CA. Located in the heart of Silicon Valley, the speculative Class A office building broke ground in March, 2014 and is expected to be completed in October, 2015. Spear Street Capital, the San Francisco-based real estate investment company is developing the property and ARC TEC is the architect. The South Bay Construction Company is the general contractor.

Stadium Tech Center Project Conco Companies

As a part of the project, Conco is constructing the parking structure, which will have one level of podium parking and 3 levels below grade for a total of 1,084 parking stalls. In addition we will provide 442,165 square feet of cast-in-place slabs, 169,014 square feet of slab-on-metal deck, and 35,054 cubic yards of concrete. Floors will have a slab-to-slab height of 14′ – 16′.

The new Center will incorporate cutting edge architectural details and feature 35,000 – 38,000 sq. ft. floor plates and a flexible open plan with 226,500 sq. ft. of column free space. Also the building’s floor to ceiling glass will offer 360 degree views. The energy-efficient design is prequalified for LEED certification.

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Located on a 12.35 acre site, the Center has direct access off Highway 237 and is just a short walking distance from the new 49ers Levi Stadium and Joe Montana’s “Centennial Gateway” luxury hotel and entertainment complex. Highlights of the building include a state-of-the-art lifestyle fitness center and café as well as full access to the existing campus amenities such as a full-service cafeteria, bocce ball court, outdoor recreational areas and jogging trail.

We are a leading supplier of concrete services for the Western U.S. and got our start in the Bay Area in 1959 by offering clients the best value on a wide range of concrete services and products. Since that time, we have taken a leading role as one of the top concrete contractors in the region. We currently serve California, Washington, Oregon, Nevada and Colorado.


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