Graymont is one of the leading suppliers of lime in the northeastern United States.  The Pleasant Gap plant, situated in the State College area of Pennsylvania is the most modern lime plant in the region. The site encompasses a rotary preheater lime kiln (2005), a rotary lime kiln (2008), a vertical twin-shaft lime kiln (2016), two new lime-hydrating plants (2005 and 2018), a pulverized limestone plant (2006), and a robotic bagging and palletizing plant (2018).  

The newest rotary lime kiln incorporates a highly efficient emissions-scrubbing system, along with power generation from a waste heat recovery system - the only system of its kind on a lime kiln in North America.

Pleasant Gap also provides bulk product storage capacity and a multi-mode shipping capability, assuring that when Graymont customers place an order, it will be quickly shipped by rail or truck.

The Superior plant, located on the Lake Superior waterfront in Superior, Wisconsin, is ideally positioned to service the upper Midwestern states and central Canada.

Limestone is not quarried at this site; it comes from quarries in Michigan and is transported by self-unloading bulk freighters to the Superior dock. Finished product is shipped out by truck and rail, often providing return loads for overland carriers who have dropped off commodities for shipping out of the port.

Three types of limestone are calcined at the Superior facility to produce high calcium quicklime, high-calcium hydrated lime, dolomitic quicklime and PCC quicklime.The newest addition to the plant is kiln #5, a state of the art, high-efficiency preheater lime kiln.

In addition to calcined lime products, the plant is also a major supplier of finely ground limestone utilized by various mining and manufacturing customers throughout the Midwest.

Graymont's manufacturing facility in Gulliver, Michigan, produces high-calcium pebble lime in a rotary kiln, from limestone that is quarried on site. Lime from this plant is shipped by rail and truck throughout Canada and the U.S. under the brand name Western High Cal Pebble Lime.

Graymont's manufacturing facility in Green Bay, Wisconsin produces high-calcium pebble and hydrated lime from limestone sourced from quarries in Michigan. The limestone is delivered to the Company's dock by self-unloading lake vessels. Sufficient inventories of stone must be kept on hand in order to maintain full production through the winter months when the ships are laid up and  the quarries are closed.

The Green Bay site includes two rotary kilns and a lime hydrator as well as bulk storage capacity and warehousing space for bags. Calcium oxide is shipped in bulk and hydrate is shipped either in bulk, bulk bags (super sacks) or paper sacks by rail or truck throughout the United States, under the brand names Western High Cal Pebble Lime and Western Pure Cal Hydrated Lime.

Graymont's manufacturing operations at Eden, Wisconsin produce dolomitic pebble lime and 'Type S' pressure hydrated lime from dolomitic limestone quarried on site. In addition to the rotary kilns and hydrator, the company operates a blending plant for lime-based mortars, which are available in more than 250 colors. The Eden plant ships products throughout Canada and the United States under the brand names Western Miracle Masons Lime, Western Type S, N and M gray and Colored Mortar Mixes and Limate, General Purpose Lime. Both the Eden and Green Bay, WI plants are served by the Canadian National Railroad.

Graymont's Faulkner lime plant is located near Moosehorn, Manitoba, within two miles of the shore of Lake Manitoba. The plant consists of a preheater-equipped rotary kiln that can produce both high-calcium quicklime and dolomitic lime. The kiln is fired with pulverized coal and petcoke. Seven silos provide storage for pebbled, pulverized and crushed quicklime or dolomitic lime. The plant is fully equipped with truck load-out equipment. In addition to quicklime production, the plant produces calcium carbonate.

Graymont's Summit lime plant is located in the Crowsnest Pass area of Southern Alberta. The plant produces limestone and aggregates. Lime operations at this site are currently idled.

The Exshaw plant, situated west of Calgary, Alberta, produces a wide range of lime and limestone products, including high-calcium quicklime, hydrated lime, pulverized limestone and screened limestone. Lime is produced in two rotary preheater kilns.

Storage and shipping facilities are designed to provide flexible load-out for both bulk truck and rail transportation of products, making this plant an extremely reliable source of supply. Bagged lime and limestone products are also available from this plant.

This plant/terminal is located on the Blair Waterway in the Port of Tacoma, Washington. The plant produces hydrated lime products in both bags and bulk. Bagging facilities, bin-bag loading and bulk storage are available for both quicklime and hydrated lime products. These products can be loaded into trucks, railcars or sea-born shipping containers at the plant. Finished lime products can be shipped by truck, rail or barge.

Graymont's Cricket Mountain Plant, situated near Delta, Utah, ranks among the largest, most modern and efficient lime plants in the Western United States. High quality limestone and dolomite are quarried in the Cricket Mountains, approximately six and one-half miles west of the plant. The perfect confluence of ore body, rail spur, and highway access enables Cricket Mountain to effectively compete in both the U.S. and Canadian markets.

Limestone is crushed and sized at the quarry and delivered by truck to the plant where five modern coal-fired kilns produce a wide variety of lime products, including bulk high-calcium and dolomitic quicklime, as well as crushed and pulverized limestone. The plant also has blending facilities capable of producing precise blends for a number of specific applications, including use by the steel industry. Storage and shipping facilities at Cricket Mountain are designed to provide a reliable source of supply to both truck and rail-serviced customers.