CORPORATE HEADQUARTERS Colorado Springs Office: Mining Exchange Building 8 S. Nevada Ave. - Suite 515 Colorado Springs, CO 80903 (719) 477-6850 Fax: (719) 477-0818 Tom Duchen, President email: tduchen@rivoaks.com Denver Office: 6860 S. Yosemite Ct. Suite 200 Centennial, CO 80112 (303) 721-0653 Fax: (303) 721-1746 Bob Duchen, Vice President email: bduchen@rivoaks.com