The Company was organized in St. Louis, Missouri under the authority of Major General John C. Frémont.
The company was intended to provide engineering and pioneer support to the Army of the West operating at that time in the state of Missouri.
While the company was subsequently consolidated with other organizations, it appears to have continued to carry out specialized engineering functions, at least thought the end of 1862 and possibly later.
Attached to Army of the West and Unattached District of Southwest Missouri, Dept.
At least some of the members of Company "I" were subsequently transferred to the 1st Regiment Missouri Volunteer Engineers.