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Russian River Hydrologic Report June 25, 2021 - July 1, 2021

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Russian River Hydrologic Report June 25, 2021 - July 1, 2021 State Water Resources Control Board Temporary Urgency Change Order (6/14/2021) Russian River Hydrologic Report June 25, 2021 - July 1, 2021 Prepared as a requirement of the Order approving Sonoma Water's Petition for Temporary Urgency Change in Permits 12947A, 12949, 12950, and 16596 (Applications 12919A, 15736, 15737, and 19351). Instream Flow Requirements as of July 1, 2021 Basis Reach Instantaneous (cfs) 5-day Average (cfs) Modified Per Order: Critical Condition Upper Russian River 15 25 D-1610: Dry Condition Dry Creek 25 - Modified Per Order: Critical Condition Lower Russian River 25 35 Upper Russian River and Lower Russian River based on criteria as established in the Order issued 6/14/2021. Lake Mendocino Lake Mendocino Storage 2015 - 2021 and Storage Curve 120,000 100,000 80,000 feet - 60,000 Acre 40,000 July 01, 2021 30,586 Acre-feet 20,000 2015 2016 2017 2018 2019 2020 2021 Storage Curve Major Deviation Curve Emergency Regulation Storage Threshold 0 3/1 4/1 5/1 6/1 7/1 8/1 9/1 1/1 2/1 10/1 12/1 11/1 Storage July 1, 2021 30,586 (acre-feet) Total Average Daily Rate Change in Storage Last 30 days -4,337 -145 (acre-feet) Last 7 days -1,112 -159 Min 7 Daily Inflow Last 7 days Max 24 (cfs) Mean 15 Min 82 Release (cfs) Last 7 days Max 84 Mean 83 Release Flow Change Ramping Rates : Approved Adjusted Rates Event Requested: 3/1/2021 Purpose: California Department of Fish and Wildlife (CDFW) and National Marine Fisheries Service (NMFS) has requested the discharge from Coyote Valley Dam be increased from 25 cfs to 100 cfs to facilitate the second and final release of steelhead smolts from the Coyote Valley Fish Facility. The increase in discharge is necessary to volitionally push the smolts out into the river to reduce the risk of predation. Consultation: Staff from Sonoma Water, CDFW and NMFS met on February 26th to discuss the smolt release and associated ramping schedule in light of the very low storage levels in Lake Mendocino. Based on that discussion, Sonoma Water, CDFW and NMFS agreed on the ramping schedule shown below starting on or around March 13th. On March 4th, CDFQ requested the flow changes to occur as soon as possible due to the Coyote Valley Fish Facility experiencing operation challenges. Fow increases will occur incrementally following a ramping rate of 25 cfs per hour. Flow decreases will follow a ramping rate of 25 cfs every eight hours. Date Time ∆ cfs New Set Point (cfs) 7-Mar 9:00 AM +25 50 7-Mar 10:00 AM +25 75 7-Mar 11:00 AM +25 100 9-Mar 12:00 PM -25 75 9-Mar 8:00 PM -25 50 10-Mar 4:00 AM -25 25 Page 1 Lake Sonoma Nathan Baskett, March 3, 2021 Lake Sonoma Storage 2015-2021 350,000 300,000 250,000 200,000 feet - Acre 150,000 July 01, 2021 129,812 Acre-feet 100,000 50,000 2015 2016 2017 2018 2019 2020 2021 0 1/1 3/1 4/1 5/1 6/1 7/1 8/1 2/1 9/1 10/1 11/1 12/1 Storage July 1, 2021 129,812 (acre-feet) Total Average Daily Rate Change in Storage Last 30 days -9,484 -316 (acre-feet) Last 7 days -1,781 -254 Min 0 Daily Inflow Last 7 days Max 0 (cfs) Mean 0 Min 101 Release (cfs) Last 7 days Max 107 Mean 105 Page 2 Acre-feet 10,000 20,000 30,000 40,000 50,000 60,000 70,000 80,000 90,000 0 1/1 1/8 1/15 *Inflow calculation based on criteria established in D1610 in established calculation *Inflow criteria onbased 1/22 1/29 PVP DiversionPVP (acre-feet) 2/5 Parameter Inflow* 2/12 (cfs) 2/19 2015 2/26 3/4 3/11 3/18 Lake Pillsbury Storage 2015Lake Pillsbury 3/25 2016 4/1 4/8 4/15 4/22 2017 4/29 5/6 2021 1, 20201, July October - 5/13 Project Potter Valley 5/20 2018 - DateRange 20211, July 2021 and Target Storage Scenarios Storage Target and 2021 Last 7 days 7Last 5/27 Lake Pillsbury 6/3 Page 3 6/10 (Target 78,353) C 32,653 Acre 32,653 2019 6/17 2021 July 01, 6/24 7/1 7/8 - feet feet 7/15 2020 7/22 7/29 8/5 8/12 Cumulative 2021 8/19 87,593 200 8/26 9/2 9/9 9/16 A Target 9/23 9/30 30 10/7 Daily Average Daily 10/14 321 Target B Target 10/21 29 10/28 11/4 11/11 11/18 11/25 Target C Target 12/2 12/9 12/16 12/23 12/30 Russian River Flows (June 25 - July 1, 2021) 24-hr Average Flow (cfs) Gage Jun 25, 2021 Jun 26, 2021 Jun 27, 2021 Jun 28, 2021 Jun 29, 2021 Jun 30, 2021 Jul 1, 2021 The Forks* 84 84 84 84 84 84 82 Talmage 70 70 70 69 70 70 67 USGS 11462080 Hopland 64 66 68 67 63 61 59 USGS 11462500 Cloverdale 62 63 64 66 64 62 61 USGS 11463000 Healdsburg 30 30 30 33 32 31 31 USGS 11464000 Hacienda 46 47 48 59 64 54 50 USGS 11467000 *West Fork (USGS 11461000) + East Fork (Coyote Valley Dam Release) Russian River Flows Increased flows at Hacienda due to lowering Rubber Dam height. 90 80 70 Hacienda 60 Healdsburg Cloverdale 50 Hopland Flow (cfs) Flow 40 Talmage 30 The Forks 20 10 0 6/26/2021 6/27/2021 6/28/2021 6/29/2021 6/30/2021 7/1/2021 Page 4 Lake Mendocino Water Quality Vertical Profiles (June 25 - July 1, 2021) LM Dam - Vertical Temperature Profile - 2021 Temperature (°C) 6 8 10 12 14 16 18 20 22 24 26 28 30 0 10 20 3/4/2021 4/7/2021 30 4/22/2021 5/6/2021 5/20/2021 40 6/3/2021 Depth (ft) Depth 6/17/2021 50 7/1/2021 60 70 80 LM Dam - Vertical DO Profile - 2021 Dissolved Oxygen (mg/L) 0 2 4 6 8 10 12 14 0 10 20 3/4/2021 4/7/2021 30 4/22/2021 5/6/2021 5/20/2021 40 6/3/2021 Depth (ft) Depth 6/17/2021 50 7/1/2021 60 70 80 LM Dam - Vertical Turbidity Profile 2020 - 2021 Turbidity (NTU) 0 5 10 15 20 25 30 35 40 45 50 0 10 20 3/4/2021 4/7/2021 30 4/22/2021 5/6/2021 5/20/2021 40 6/3/2021 Depth (ft) 6/17/2021 50 7/1/2021 60 70 80 Page 5 Russian River Water Quality (June 25 - July 1, 2021) Provisional Data Subject to Revision East Fork Below River Diversion Calpella Hopland Cloverdale* Jimtown* Diggers Bend Hacienda Bridge Johnsons Beach* Parameter Lake Mendocino System at Mirabel* SCWA USGS 11461500 USGS 11462500 USGS 11463200 USGS 11463682 USGS 11463980 SCWA USGS 11467000 SCWA Min #N/A 66.9 61.3 67.6 65.7 70.9 #N/A 70.7 #N/A Temperature 77.5 70.5 78.1 75.9 81.9 #N/A 76.5 #N/A (°F) Max Mean 72.9 66.3 72.4 70.4 75.9 #N/A 73.9 #N/A Specific Min 277 260 #N/A 344 349 #N/A 229 #N/A Conductivity Max 294 267 #N/A 353 356 #N/A 238 #N/A (µS/cm) Mean 284 265 #N/A 348 353 #N/A 234 #N/A Dissolved Min 6.4 6.9 7.0 4.7 5.3 #N/A 7.5 #N/A Oxygen Max 9.4 11.9 9.8 10.2 11.1 #N/A 10.4 #N/A (mg/L) Mean 7.5 9.0 8.2 7.1 7.9 #N/A 8.4 #N/A Dissolved Min 69 70 75 50 59 #N/A 84 #N/A Oxygen Max 114 133 119 121 139 #N/A 124 #N/A (% Saturation) Mean 85 97 93 80 93 #N/A 98 #N/A Min 7.8 7.6 #N/A 7.2 7.8 #N/A 7.4 #N/A pH Max 8.4 8.7 #N/A 7.5 8.5 #N/A 8.1 #N/A Mean 8.1 8.1 #N/A 7.3 8.1 #N/A 7.6 #N/A Min 1.2 1.6 #N/A 0.2 0.3 #N/A 0.8 #N/A Turbidity 42.7 20.0 #N/A 1.2 2.2 #N/A 2.5 #N/A (NTU) Max Mean 2.2 2.6 #N/A 0.6 1.0 #N/A 1.5 #N/A *Station operated seasonally Water Quality Mean Values River Diversion System Calpella Hopland Cloverdale* Jimtown* Diggers Bend at Mirabel* Hacienda Bridge Johnsons Beach* 380 10.0 360 340 9.0 320 300 8.0 280 260 7.0 240 Turbidity Temperature 6.0 220 200 5.0 180 160 4.0 140 120 3.0 100 pH, Oxygen, Dissolved Specific Conductivity, Specific Conductivity, 80 2.0 60 40 1.0 20 0 0.0 Specific Conductivity (µS/cm) Temperature (°F) Dissolved Oxygen (mg/L) pH Turbidity (NTU) Russian River Water Quality (March 1 - July 1, 2021) Provisional Data Subject to Revision Calpella (East Fork Russian River) Calpella Water Quality Trend 13.5 28 12.5 24 11.5 20 C) ° 10.5 16 9.5 12 8.5 8 Termperature ( Termperature DO DO (mg/L) and pH 7.5 4 6.5 0 3/1 3/5 4/6 5/4 5/8 6/1 6/9 3/9 4/2 6/5 3/13 3/17 3/25 3/29 4/10 4/18 4/22 4/30 5/16 5/20 5/28 6/13 6/21 6/25 3/21 4/14 4/26 5/12 5/24 6/17 6/29 DO pH Temperature Calpella- Difference between Daily Maximum and Minimum for DO and pH 300 4.0 3.5 250 3.0 200 2.5 150 2.0 Flow (cfs) Flow 1.5 100 1.0 50 0.5 0 0.0 in (mg/L)DO pH and Difference 3/1 3/9 4/6 5/4 5/8 6/1 6/5 3/5 4/2 6/9 3/13 3/17 3/25 3/29 4/10 4/14 4/22 4/26 5/12 5/20 5/24 6/13 6/17 6/21 6/29 4/18 4/30 5/16 5/28 6/25 3/21 Flow pH DO Page 6 Flow (cfs) DO (mg/L) and pH Flow (cfs) DO (mg/L) and pH 100 150 200 250 300 350 400 450 100 120 10.5 11.5 12.5 13.5 50 20 40 60 80 6.5 7.5 8.5 9.5 0 0 10 11 12 13 14 6 7 8 9 3/1 3/1 3/1 3/1 3/5 3/5 3/5 3/5 3/9 3/9 3/9 3/9 3/13 3/13 3/13 Mendocino) Lake (Below River Russian Fork East 3/13 3/17 3/17 3/17 3/17 3/21 3/21 3/21 3/21 3/25 3/25 3/25 3/25 3/29 Hopland 3/29 3/29 3/29 4/2 4/2 4/2 4/2 Russian Water (March 1, River Quality 2021) 1 - July East Fork Russian River (Below Lake Mendocino) Water QualityRussian Fork Mendocino)Trend River East (Below Lake Water 4/6 - 4/6 Difference between Daily Maximum and Minimum for DO and pH DO and for Minimum and Daily Maximum between Difference 4/6 4/6 East Fork Russian River (Below Lake Mendocino) (BelowLake River Russian Fork East 4/10 4/10 4/10 4/10 Provisional Data Subject to Revision 4/14 4/14 4/14 4/14 4/18 4/18 Trend Quality Water Hopland 4/18 4/18 DO DO 4/22 4/22 4/22 - 4/22 Difference between Daily Maximum and Minimum for DOpH andMinimum andfor Maximum Daily between Difference Flow Flow 4/26 4/26 4/26 4/26 pH pH Hopland Page 7 4/30 4/30 4/30 4/30 pH pH Temperature 5/4 5/4 5/4 Temperature 5/4 DO 5/8 5/8 DO 5/8 5/8 5/12 5/12 5/12 5/12 5/16 5/16 5/16 5/16 5/20 5/20 5/20 5/20 5/24 5/24 5/24 5/24 5/28 5/28 5/28 5/28 6/1 6/1 6/1 6/1 6/5 6/5 6/5 6/5 6/9 6/9 6/9 6/9 6/13 6/13 6/13 6/13 6/17 6/17 6/17 6/17 6/21 6/21 6/21 6/21 6/25 6/25 6/25 6/25 6/29 6/29 6/29 6/29 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 0 4 8 12 16 20 24 28 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 0 4 8 12 16 20 24 28 Difference in DO (mg/L) and pH Termperature (°C) Difference in DO (mg/L) and pH Termperature (°C) DO (mg/L) and pH Flow (cfs) Flow (cfs) 100 200 300 400 500 600 0 10 11 12 13 200 250 300 350 400 100 150 DO (mg/L) and pH 4 5 6 7 8 9 50 10.5 11.5 12.5 13.5 0 4.5 5.5 6.5 7.5 8.5 9.5 3/1 3/1 3/1 3/1 3/5 3/5 3/5 3/5 3/9 3/9 3/9 3/9 3/13 3/13 maximum gauge gauge 3/13 exceeded stream 3/13 Flow cfs 3/17 3/17 3/17 400 3/17 .
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