Encyclopedia Dubuque
"Encyclopedia Dubuque is the online authority for all things Dubuque, written by the people who know the city best.”
Marshall Cohen—researcher and producer, CNN
Affiliated with the Local History Network of the State Historical Society of Iowa, and the Iowa Museum Association.
BRICK MANUFACTURING
BRICK MANUFACTURING. Brick Makers. In the late nineteenth century, most brick works were similar. Soak pits were used to prepare and mix clay. Clay was mixed with water and soaked overnight for softening so that it could be shaped into bricks using wooden forms. Once technology began to take over, molding the bricks into the proper shapes became easier by using a soft-mud brick machine. The machine automatically shaped the pieces of clay into the form of bricks. A talented brick maker could produce about 4,000 bricks per day by hand. By the 1890s, some brick machines could even produce up to 5,000 bricks per hour.
The next step was drying the bricks to make them hard and durable. Brick-makers would put the soft bricks into a steam-heated drying room. The drying room was usually the largest area of a brick works facility because they had to handle such a large amount of bricks at a time. Towards the end of the existence of the brick works, the companies used a drying tunnel which allowed the bricks to move through the drying room by a conveyor belt with steam heat blown on them. By using a drying tunnel a much higher quantity of bricks could be dried and finished at a time, achieving higher sales and saved labor. Before the technology of drying rooms and tunnels, brick-makers had to lay bricks outside to dry naturally in the sun.
The last process was to fire the clay in kilns to cook the clay before it went through a final drying process. By cooking the clay, all of the finer elements were fused with one another to create a stronger, more durable, solid mass.
1859
A. Graham corner of Hill and 5th Street
P.S. Wells corner of Hill and 5th Street
1867
John Behrens Division near Lake
Caleb Knapp head of Third
1868-1869
John Blake Mineral near Seventeenth
Anton Heeb south side of Eagle Point Ave. near Couler Ave.
Hughes & Hutton head of Third
Mrs. Harriet Wells north east corner of Fifth and Hill
1870-1871
A. Knapp southwest corner of Julien Ave. and Nevada
Bernard J. O'Neill west side of Hill between Fifth and Pine
1873-1874
John Heim Couler Ave. and 29th
Hildebrand & Ham on Division
August Rober Eagle Point
1874-1875
T.B. Ham 740 High
Platz & Dietrich Division
E. Roeber north side of Lake east of 9th
1875-1876
Hutton & Curry 495 West 5th
A.J. Knapp West end West 3rd
C. Knapp corner of Grandview and Dodge
C.H. Mattox corner of Hill and 5th
J. Platz Division
A. Reper head of Lake
1876
Graham corner of Hill and 5th
1878-1879
August Roeber west side Lake between 6th and 7th
O.C. Knapp near corner Dodge and Grandview
1886-1887
John Dietrich 93 Lincoln
D. Maggenburg east side of Broadway north of Diagonal
1889
William Bentley 204 Delhi
1899
Dietrich Bros 1203 Lincoln
Eagle Point Lime Works Lime near Lincoln
Albert Gasser Grandview and Fremont, 307 Grandview
Mrs. Agatha Heim 3403 Couler Ave.
1909
Dietrich & Beutin yards on hill west of Lincoln and Ann
1911
John Heim Broadway Extension