DMC ENTERPRISES

DMC Enterprises Brings Down Nine Buildings at Camp Pendleton 1st Marine Division Operations Complex

By Brian Hoover, Senior Editor

Above: Loading concrete for processing on Camp Pendleton demo project.

Naval Facilities Engineering Systems Command (NAVFAC) South recently awarded Harper Construction Company, Inc. of San Diego a $42.6 million contract for the design and construction of a division operations complex at Marine Corps Base (MCB) Camp Pendleton. Construction will include a new 58,931 square foot Division Command Post Headquarters, an 11,538 square foot Battalion Command Post Headquarters and parade field. Other project features include paving and other site improvements such as new paving, parking areas, curbs, gutters, sidewalks, landscaping, trash enclosures and signage.

Before any new construction could take place on this Camp Pendleton project, the existing nine single-story concrete buildings and nine temporary trailer buildings had to be demolished and removed. Harper Construction Company subcontracted all of the demolition and grading responsibilities to DMC Enterprises (DMC) out of Vista. Tim Mountney has been overseeing all demolition and grading operations on the project, serving as estimator, project manager and project engineer. “Our contract for demolition and grading began in Sept. 2021 and will be complete by the end of Feb. 2022,” says Mountney. “We started by removing trees and other landscape material. Next, we moved on to the surface demolition to include parking lots, sidewalks, curb and gutter and other outside structures. In all, we demoed around 80,000 square feet of space that made up the nine existing concrete barracks buildings.”

DMC then moved to the interior, where their crews essentially removed everything but the concrete. The removal of asbestos and other hazardous materials was subcontracted to another contractor, while DMC performed all further demolition and material segregation. “The buildings were all concrete exterior, including the roof. Our crews first removed all of the wood, drywall, copper, and

Above: DMC crews processing rebar with Cat 335F excavator and shear at Marine Corps Base Camp Pendleton.

other wiring and fixtures before going after the concrete,” says Mountney. “These nine structures were built much like a parking structure with precast girders and trusses. In all, we demoed around 30,000 tons of concrete, all crushed onsite to be used later as base material. We also removed and processed close to one thousand tons of rebar and 500 tons of copper and other metals.

Mountney points out that while most of the walls were around 12-inches thick, other sections like the slab were up to 4 feet thick. “There were around 180 3-foot-thick pad footings throughout the nine buildings and 6-inchs of concrete roof on each structure. That is a lot of concrete with a ton of rebar that had to be separated and trucked offsite,” says Mountney. “Separating all of the materials is always a challenge. For instance, take the roof that had 4-inches of Styrofoam glued to the concrete. This required special treatment where our crews shaved off and disposed of the material without any fragments flying away in the wind.”

In addition to demolition, DMC was also contracted to perform the mass and fine grading on this project. “We moved around

Below: DMC Enterprises using their Volvo ECR305CL excavator to load chunks of concrete into RM mobile crusher and pulverizer. DMC will crush and process more than 30,000 tons of concrete on this Camp Pendleton demolition project before jobs end.

Above Left: Cat D8T dozer helping to move more than 40,000 cubic yards of earth at Camp Pendleton Marine Corps Base.

Above Right: DMC Enterprises using their Cat 633E scraper for mass grading on Camp Pendleton project.

Right: Cat 140M motor grader performing finish grading.

40,000 cubic yards of earth and performed a 5-foot remove and recompact for the new building pads. It was around a 12-acre site, so we had plenty of room to move around without space restrictions,” says Mountney. “We were also required to leave the site with 95% compaction on everything, which is definitely not typical.”

DMC maintains a large fleet of equipment, and they utilized a full variety on this Camp Pendleton project. “For the grading work, we used motor graders, Cat 633 and 623 scrapers, and a Cat D8T dozer with GPS. It was all flat and easy with nothing over a five-foot cut,” continues Mountney. “We also made use of three excavators, including a Cat 336FL, a Cat 335FL and a Volvo ECR305CL. One machine was equipped with a concrete processor, another with a thumb attachment for loading and separating material, and one with a conventional bucket for loading. We also had two Cat 966 wheel loaders with a skeleton bucket on one machine and a 4-n-1 bucket on the other for separating material. Our operators and laborers did a fantastic job bringing down and processing these nine buildings, and they deserve a lot of praise and recognition.”

DMC Enterprises is also busy right now on a massive grading and earthwork project at UC Riverside, where a new school of medicine is being constructed. Additionally, DMC is working for the City of San Diego Airport Authority, where they are doing both demolition and grading on a new sewer treatment plant project. DMC Enterprises was formed in 2012 by Danny Milosavijevic, who learned his trade from his father and grandfather, who started in the grading and excavating business back in the 70s. For more information on DMC Enterprises, please visit www.dmc-ent.com or call their Vista headquarters at (760) 908-6148. Cc

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