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A partnership in 1920 between Edward F. Regenhardt and the Harrison brothers led to the establishment of a series of construction and materials companies that would eventually become the Delta Companies Inc.

This first partnership performed work throughout Missouri, Illinois, and Kentucky, building roads and performing other concrete construction projects.

In the 1930s, Regenhardt’s three sons, Edward Jr., Ted, and William Sr., entered the partnership. Later, Ted and Edward Jr. sold their parts of the business to their brother, leaving William Sr. as a partner with the Harrison brothers.

Bob Harrison eventually bought out his brothers and the partnership then consisted of Harrison and Regenhardt Sr. In the late 1940s, these two enterprising men expanded the company into coal mines, highway construction, and levee building. In 1948, they started a quarry, Southern Illinois Stone Company in Buncombe, Illinois.



Joe Regenhardt (TL); Bill Regenhardt (TR); Tom Regenhardt (BL); D. L. Harrison (BR)

Delta Companies performed work on Interstate and State highways in Missouri and Illinois. In the 1950s, William Regenhardt Jr. and a company mechanic invented the Concrete Form Paving machine for concrete paving on the State highways. This machine was first used on Illinois Route 37 in Whittington, Illinois.

The Regenhardt brothers sold their share of the Regenhardt Construction Company to the R.B. Potashnick Company and D.L. Harrison in 1959, thus forming the D.L. Harrison Company.

The D.L. Harrison Company continued to expand into the concrete paving business. In August 1959, the D. L. Harrison Company became only the ninth highway-paving contractor in the nation to pave over one linear mile in one day while performing work on I-57 in Scott County, Missouri.

As the Interstate program wound down in the area, the company began converting from a predominately concrete construction company into the vertically-integrated company it is today. Don Harrison and the Regenhardt brothers purchased land in southern Cape Girardeau and formed Southeast Missouri Stone Company, which began providing aggregates locally.

In 1962, Don Harrison started a separate company based in Cape Girardeau, Missouri called Delta Asphalt Inc., with the establishment of the Cape Girardeau Asphalt Plant. This company was joined in 1964 by Girardeau Contractors, Inc., an asphalt paving company operating in Missouri. Around the same time, the Regenhardt brothers began Southern Illinois Asphalt Company in Illinois.


In 1966, the D.L. Harrison Company began construction operations in Central America, where the company would build roadway projects in the republics of Guatemala and El Salvador, including two sections of the Pan American Highway.

In the early 1980s, Delta Asphalt performed asphalt paving and road construction work in the famed French Quarter in New Orleans, Louisiana in preparation for the 1984 Louisiana World Exposition. In 1987, Delta Concrete, Inc. was formed in Cape Girardeau for the production and sale of ready mix concrete and expanded to cover all of southeast Missouri.

The Delta group of companies became part of Colas Inc. in 1992. Based in Morristown, New Jersey, Colas Inc. operates a network of companies from Alaska to Florida and Maine to Southern California providing solutions in the areas of preservation, maintenance, and expansion of infrastructure and transportation projects.

The Company continued to expand its involvement in all phases of highway construction, specializing in hot mix asphalt and aggregates.

In 2009, Delta returned to the liquid asphalt business, leasing terminals in New Madrid, Missouri and Memphis, Tennessee. These operations primarily supply the needs of the Delta group. The operation is known today as Heartland Asphalt Materials Inc.

In an effort to consolidate its position in the Bootheel of Missouri, Delta executed two solid business moves in the fall of 2017. Those decisions were to purchase the Heartland Materials Quarry in Jackson, Missouri, and to divest of all the assets of Delta Concrete, Inc. The acquisition of the quarry allows Delta to provide aggregates to a larger footprint in southeast Missouri.


Delta Asphalt, Inc. and Apex Paving Co., subsidiaries of the Delta Companies Inc., acquired all of the assets of ASA Asphalt, Inc. in the state of Missouri in March 2018. This acquisition enables Delta to further serve the private, commercial, and industrial sector throughout southeast Missouri.

ASA Asphalt

Today, Delta works in Missouri, Arkansas, and Illinois with operations in road construction, asphalt plants, quarries, and liquid asphalt production and sales. The number of employees ranges from 250 to 400 over the calendar year, with peak employment from April to October due to the seasonal nature of construction operations.

Delta Companies Inc. is one of the few firms in today’s construction industry with the level of experience, expertise, and longevity to carry forward successfully throughout the 21st Century. By combining strong project management with the latest technological advances and cutting-edge construction methods, Delta Companies Inc. has established a reputation for safely completing projects to specification while meeting time and budget constraints.



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