Builders Sand & Gravel founded by Hans Koos in Davenport, IA.

Builders Sand & Gravel is a key material supplier for the construction of the Rock Island Arsenal.

John Henry Hahn purchases property off Stewart Road in Muscatine

Hahn Bro's Commission Merchants Begins as an agricultural sales company in Muscatine, founded by John Henry Hahn, George Hahn, and Henry Hahn.

W.G. Block is founded in Davenport, IA as a coal and Ice supplier.

Hahn Bros enters the lumber business, and then exits by 1895.

Hahn Bro's, Inc. is the largest supplier of cabbage to the U.S. military in WWI.

Henry Hahn and family start dredging sand from the family farm. At some point, Robert Hahn invents the world's first roller-bearing mounted centrifugal sand pump, and refuses to patent it.

Builders Sand & Cement acquired by Miss Ethel Delarue.

Builders enters the ready mix concrete industry.

Edwards Ready Mix founded in Geneseo, IL.

Robert Hahn and his son Tom set up Hahn's first ready mix concrete batch plant in Muscatine.

After Miss Delarue's passing, Builders is sold to Alter Corp.

Hahn Bros Sand & Gravel reincorporates as Hahn Ready Mix

Tom Hahn sets up Hahn's first automated batch plant in Muscatine.

Hahn Ready Mix acquires Grunder & Sons Ready Mix with locations in West Liberty, Wilton, Durant and Walcott.

Hahn acquires Mercer County Ready Mix in Aledo, IL.

Alter Corp sell Builders Sand & Cement to Ira Weindruch.

Hahn sets up their first portable batch plant to service the construction of the IPSCO Steel Plant in Blue Grass, IA. The project consisted of over 90,000 cubic yards of concrete.

Builders Sand and Cement acquired by Brian Hahn.

W.G. Block Co. and Edwards Ready Mix acquired by Brian Hahn.

Block Ready Mix Group And Builders Sand & Cement merged into Hahn Ready Mix.

Hahn Ready Mix is selected to supply the concrete for the new I-74 Bridge in the Quad Cities. Hahn supplied over 215,000 cubic yards to the project over four and a half years.

The I-74 Bridge project and Hahn team wins the International ACI Excellence in Concrete Award for top Infrastructure Project.