Kolker Law Office Address: 102 N Main St, Groton, SD 57445 Phone: (605) 397-8464 Hours: Mon: 9am-5pm Tue: 9am-5pm Wed: 9am-5pm Thu: 9am-5pm Fri: 9am-5pm Lawyers Other Businesses: Red Horse Inn Restaurant at 2 W Highway 12 & Highway 37, Groton, SD 57445