Gravel Products Inc. (GPI) is one of the leading construction aggregates suppliers in the state of North Dakota.

In the late 1960’s, founder William Schriock Jr. recognized the need for a reliable rock, sand, and gravel provider to support the growing Minot area.  By the year 1970 his vision was taking shape and GPI opened its first gravel pit known as “The Main Pit”.  Expansion continued throughout the 1980’s and 90’s with the addition of “The Soo Line Pit” and “The West Pit” along with the acquisition of the redi-mix company; Concrete Mobile. The oil boom of the mid 2000’s led to the addition of two gravel pits in Williston and one near Stanley.  

Over the years, these multiple locations have allowed GPI to provide fast delivery and added product diversity.  They have also proven to be very beneficial to both contractors and individuals alike.  Having quick convenient access to the closest sources of aggregates has saved time and reduced trucking costs for our customers helping them have the best experience possible.

Past projects include providing aggregates for the construction of the Williston International Airport, Minot International Airport, Minot Airforce Base, Coteau and Falkirk coal mines, and countless NDDOT and County road construction jobs.  The company was also instrumental in the fight against the devastating flood that roared through Minot and the surrounding communities in the spring of 2011. 

Supporting our local community, quality products and the ability to “get jobs done” have always been hallmarks of Gravel Products.  The combination of a state-of-the-art NDDOT certified testing facility, modern processing equipment, a fleet of reliable late model trucks, and highly skilled employees ensure that the company’s logo will remain a symbol of excellence for years to come.   







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