Resource Efficiencies

Reducing energy use is a priority at Summit Materials. Since 2012 we have initiated several impactful programs across Summit that have demonstrated improvements in efficiencies and overall footprint. Many of our companies have also taken steps to improve the sustainability of their business on an individual basis. We are proud to include all of these projects into our portfolio, thereby decreasing our energy footprint. Below you can find out more details about what measures we are taking to reduce our energy and resource use.
  

Natural Gas Usage at Our Asphalt Plants

Since 2012 we have reduced our greenhouse gas emissions at our asphalt plants by switching from burner fuel, mainly recycled used oil to natural gas at a majority of our operations. This reduction allows our plants to maintain the same levels of production with a cleaner burning fuel that emits less CO2. Between 2012 and 2015 at our hot mix asphalt plants we have reduced our CO2 emissions by 42%, or 19,198 tons in 4 years.
  

Alternative Energy Use at Our Cement Plants

We operate one of three cement plants in the nation at our Hannibal MO facility that co-process solid and liquid hazardous waste to fuel our cement kiln. This energy source offsets fossil fuel usage and is a safe and efficient method of destroying these hazardous materials. In 2015, the Hannibal plant consumed 41% of their total energy from waste, which equates to 80,000 tons of hazardous waste.
 
Our cement plant in Davenport IA also co-processes alternative fuels as an energy source in their cement kiln. Davenport reported 38% of their total energy use to be derived from alternative fuels in 2015. These are materials that would otherwise be disposed in landfills, including expired seed corn and beans, rejects from recycling of cardboard, baled plastic from a curbside recycling center, automobile scrap carpet, and byproduct from pet food production. In 2015 Davenport used 32,092 tons of solid alternative fuel. To put our waste usage into perspective, the average American generates an estimated 1,606 lbs of garbage each year (EPA, 2013), therefore our use of these materials offset the amount of garbage that nearly 40,000 Americans generate in a year.
  
Our cement plant in Davenport IA also co-processes alternative fuels as an energy source in their cement kiln.  Davenport reported 38% of their total energy use to be derived from alternative fuels in 2015.  These are materials that would otherwise be disposed in landfills, including but not limited to, expired seed corn and beans, rejects from recycling of cardboard, baled plastic from a curbside recycling center, automobile scrap carpet, and byproduct from pet food production.  In 2015 Davenport used 32,092 tons of solid alternative fuel.  To put our waste usage into perspective, the average American generates an estimated 1,606 lbs of garbage each year (EPA, 2013), therefore our use of these materials offset the amount of garbage that nearly 40,000 Americans generate in a year. 
  

Vancouver Quarry switches from Diesel Generator to Hydro Electric Grid

Mainland Sand and Gravel has operated their Jamieson Quarry since 2002. By 2012, the business had grown enough to be comfortable starting the process of obtaining Hydro Electric power to replace the large trailer mounted generators that powered the crushing equipment.
 
Getting line power to the site was no simple task. After extensive work to improve driving thoroughfares, and choosing the least impactful method of installing the power lines, the power was turned on in the early part of 2016. Since that time Jamieson has reduced their CO2 output by 383 metric tons/year, which is the CO2 equivalent that 80 passenger vehicles would produce in a year. We have also reduced the noise decibels, generators run around 90 decibels at the exhaust, which is now completely eliminated. This change improves safety, health, and the general working and living conditions of our employees and neighbors. Finally, we’ve seen an impressive cost reduction associated with this project, being on the grid has halved our energy costs at this location, which amounts to a 6 figure savings year over year.
  

Water Filter Press Saves 3 Million Gallons Annually in Columbia, MO

Con-Agg is a ready mix and aggregate producer in Columbia, who has installed a water filter press at their high volume ready mix facility. Ready mix concrete is composed of cement powder mixed with water to activate the product, sand and gravel. These materials are loaded into drum mixer trucks and mixed en route to customers, when returning each truck must be washed out at the end of each day to keep the concrete from solidifying in the drum. This wash out water can be recycled many times through this new filter press. The water will also be used for dust control on site. This device will save an estimated 3 million gallons of water on an annual basis.
 
We are incredibly proud of all of the achievements and efforts our companies have made to reduce our energy footprint, increase resource efficiencies and decrease our greenhouse gas emissions. Each of these stories provide local examples for all of our stakeholders to see the improvements we have made across the company. We plan to continue working on projects of this nature to better our company, our communities, and our footprint.

 

  


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