July 1857
The second reformatory State institution (House of Refuge / State Reform School) was located at Waupun.
The regionGrade A · 1 independent source
The evidence
“This was located at Waupun in July, 1857. On September 30, 1876, there were 266 inmates.”
1879-history-of-rock-county/04-wisconsin-railroads-commerce-health-statistics.md, PDF p. 238 / book p. 242
Butterfield, C. W., et al. The History of Rock County, Wisconsin: its early settlement, growth, development, resources, etc. Chicago: Western Historical Company, 1879. Cornell University Library via the Internet Archive, archive.org/details/cu31924028871585.
Grade A: Found on a page of one of our sources
On the printed page (PDF p. 238 / book p. 242) · open the whole page