Ortonville Twp 15 is a privately owned rockfill dam located in Big Stone, Minnesota, along the Minnesota River. The dam serves multiple purposes, including fire protection, stock watering, and creating a small fish pond. With a height of 27.1 feet and a storage capacity of 15.2 acre-feet, this dam plays a crucial role in water management in the area.

Managed by the Minnesota Department of Natural Resources, Ortonville Twp 15 is regulated, permitted, inspected, and enforced to ensure its safety and functionality. Despite being classified as a low hazard potential structure, regular inspections are conducted every 8 years to assess its condition. The dam has not been rated for its current condition, but emergency action plans may be in place to address any potential risks.

Located in a picturesque setting in Ortonville, this dam provides a valuable water resource for the community while also supporting wildlife habitats. As water resource and climate enthusiasts continue to monitor and protect such structures, Ortonville Twp 15 stands as a testament to the importance of sustainable water management practices in Minnesota.