Keystonedb · Newsroom
Keystone Design Build Enters New Era Under Local Ownership
Sam Kelash and Grant Mumm Bring Fresh Vision, Community Roots, and a Modern Approach to Commercial Construction in Central MinnesotaApril 21, 2026
Sam Kelash and Grant Mumm Bring Fresh Vision, Community Roots, and a Modern Approach to Commercial Construction in Central MinnesotaApril 21, 2026