Northern Nevada Water Supply Outlook Northern Nevada Planning - PowerPoint PPT Presentation

Northern Nevada Water Supply Outlook Northern Nevada Planning Commission Bill Hauck, Senior Hydrologist April 03, 2019 1

Northern Nevada Water Supply Status and Outlook for 2018 2

NRCS River Basin Snow Water Content % Average 3

NRCS River Basin Snow Water Content % Average 4

NRCS River Basin Snow Water Content % Average 5

Percent of Average (%) 100 120 140 160 180 200 220 20 40 60 80 0 1990 1991 1992 1993 1994 Truckee River Basin Snowpack 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 6

Lake Tahoe Basin Snow Water Equivalent 7

Truckee River Basin Snow Water Equivalent 8

Thank you! Questions? Bill Hauck, Senior Hydrologist Email: bhauck@tmwa.com O: (775) 834-8111 M: (775) 250-1333 9

Elevation in Feet Above Sea level Lake Tahoe Elevation (actual and projected through 2019) 6,220.00 6,221.00 6,222.00 6,223.00 6,224.00 6,225.00 6,226.00 6,227.00 6,228.00 6,229.00 6,230.00 10/1/2013 1/1/2014 4/03 NRCS Projected GCR (ft) 50% COE 2.4’ / 180% of avg (APR-HIGH ) 4/1/2014 7/1/2014 10/1/2014 1/1/2015 4/1/2015 7/1/2015 10/1/2015 1/1/2016 4/1/2016 7/1/2016 10/1/2016 1/1/2017 4/1/2017 7/1/2017 10/1/2017 1/1/2018 4/1/2018 7/1/2018 10/1/2018 1/1/2019 4/1/2019 7/1/2019 10/1/2019 1/1/2020 10

NRCS River Basin Snow Water Content % Average 11

The Truckee River System Pyramid Lake CALIFORNIA NEVADA Derby Dam Stampede FALLON Independence Lake Boca RENO/SPARKS Lahontan Prosser Reservoir Donner Lake Carson River Truckee River Lake Tahoe NORTH 12

Truckee River at Farad (actual and projected through 2019) 6,000 4/03 Projected NRCS Volume at CA/NV State Line (50% COE) 540 KAF (207% of avg) Discharge in Cubic Feet Per Second 5,000 4,000 3,000 2,000 1,000 0 10/1/2018 11/1/2018 12/1/2018 1/1/2019 2/1/2019 3/1/2019 4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019 10/1/2019 11/1/2019 12/1/2019 1/1/2020 13

Actual Truckee River Flows at Farad vs. Decree Flows 14

USGS Gage at Farad (CA/NV state line) #10346000 15

TMWA Sources in 2018 Groundwater 16% Surface Water 84% 16

NRCS River Basin Snow Water Content % Average 17

Thank you! Questions? Bill Hauck, Senior Hydrologist Email: bhauck@tmwa.com O: (775) 834-8111 M: (775) 250-1333 18

Thank you! Questions? Bill Hauck, Senior Hydrologist Email: bhauck@tmwa.com O: (775) 834-8111 M: (775) 250-1333 19

Thank you! Questions? Bill Hauck, Senior Hydrologist Email: bhauck@tmwa.com O: (775) 834-8111 M: (775) 250-1333 20