Lewis & Clark Development Group Share: Visit Website Request Info 200 1st Avenue NW Suite 100 Mandan, ND 58554 (701) 667-7600 (701) 255-7228 (fax) Facebook Hours: M - F 7:45 a.m. - 4:30 p.m.Closed Weekends About Map About CWND is a non-profit with the mission of providing affordable housing and development opportunities to revitalize communities and improve the standard of living and quality of life across North Dakota What's Nearby? Distance: 5 10 15 20 25 50 mi.