1. Colorado Plateau Colorado Dust-on-Snow Program (CODOS) Chris Landry Center for Snow and Avalanche Studies Silverton, CO

2. Applied science for stakeholder agencies …. Timely, iterative monitoring and analysis of dust effects on snowmelt timing and rates throughout the Colorado mountains … supplemental to CBRFC forecasts. Spring 2009 – From Senator Beck Basin Study Area

3. CODOS Program Funders WY 2007WY 2008WY 2009WY 2010WY 2011 Proposed WY 2011 Colorado River Water Conservation District8,000 10,000 Southwestern Water Conservation District5,000 4,0005,000 Rio Grande Water Conservation District3,0004,0005,000 Upper Gunnison River Water Conservancy Dist.5,0007,500 Northern Colorado Water Conservancy District1,5002,5002,000 Tri-County Water Conservancy District1,000 1,5002,500 Animas-La Plata Water Conservancy District500600 750 Dolores Water Conservancy District600 750 Denver Water2,500 5,000 Bureau of Reclamation – Western Colorado Area5,0007,500 Bureau of Reclamation – Lower Colorado Region7,50010,000 Bureau of Reclamation – Eastern Colorado Area2,500 Bureau of Reclamation – Albuquerque Area2,500 Western Water Assessment – Univ of Colorado20,072 Colorado Water Conservation Board28,03415,00025,000 City of Grand Junction2,500 TOTAL 16,50024,50054,57281,73475,70086,500

6. Dust-on-Snow Events Documented per Month, by Winter Senator Beck Basin Study Area at Red Mountain Pass – San Juan Mountains OctNovDecJanFebMarAprMayJunTotal 2002/2003213 2003/2004213 2004/20050000012104 2005/20060010113208 2006/20070010113118 2007/20080000033107 2008/200910101450012 2009/20101000014309 2010/201100001334011 32 Rigorous DOS Event Monitoring

7. Products

10. CODOS Monitoring Sites

11. Silverton April 3, 2009

12. Below Treeline – April 22, 2009 Above Treeline – April 24, 2009 Senator Beck Basin: March 22, March 29, April 3, April 8, April 15 2009 layers

13. Snow Albedo Measurement Senator Beck Study Plot 12,200’

15. Snow Profile #24 - June 14, 2011 Swamp Angel Study Plot

16. Snow Profile #25 - June 21, 2011 Senator Beck Study Plot Dust Layers #11-4, merged Storm #34 – June 20, 2011

17. April 17, 2009 – Berthoud Pass

18. April 18, 2009 – Willow Creek Pass

19. June 5, 2010 –Senator Beck Stream Gauge at 26 cfs

20. | March | April | May | June |

21. Rio Grande at Del Norte WY 2010

23. Center for Snow & Avalanche Studies PO Box 190, Silverton, CO 81433 Phone: (970) 387-5080 Email: clandry@snowstudies.org Web: www.snowstudies.org