American River Group Thursday, April 18Th, 2019 1:30 PM Central Valley Operation Office, Room 302 3310 El Camino Ave

Home , American River, Central Valley Project

American River Group Thursday, April 18th, 2019 1:30 PM Central Valley Operation Office, Room 302 3310 El Camino Ave. Sacramento, CA 95821 Conference Line: 1 (866) 718-0082; Passcode 2620147

JOIN WEBEX MEETING https://bor.webex.com/bor/j.php?MTID=m976285cf88d1078f4d1bdb60a280b92a Meeting number (access code): 907 429 279; Meeting password: CmfUCmGm

1. Participant Introductions (1:30-1:40)

2. Fisheries Updates (1:40-1:55)

Cramer Fish Sciences

Pacific States Marine Fisheries Commission

CDFW

3. Operations Forecast (1:55-2:10)

SMUD

PCWA

Central Valley Operations

4. Temperature Management (2:10-2:25)

Central Valley Operations

5. Discussion (2:25-2:55)

Upcoming Presentations May - Climate Change, Dr. Swain

6. Schedule Next Meeting

The next meeting is scheduled to take place on Thursday, May 16th, 2019

8. Adjourn American River Summary Conditions – March (On-going): • Snowpack is 165% of average for this date. • Flood control diagram now allowing filling of Folsom Reservoir. We are on our way up!

Storage/Release Management Conditions • Releases to manage storage during fill and try to avoid excessive flow fluctuations. • Beginning water storage for next years operational needs. • Will be operating to new Army Corps flood control diagram on an interim basis until new Water Control Manual is signed, per letter from USACE. • MRR for April is 1,750 cfs.

Temperature Management: • Upper Shutters in place on Units 2 and 3. Unit 1 is not in service. Upper shutters will be placed before it is returned to service. American River Operations Group (ARG) April 18st, 2019 Meeting Notes

Attendees: USBR: Spencer Marshall, Levi Johnson, Peggy Manza, Ian Smith CDFW: Jeanine Phillips, Duane Linander, Ken Kundargi Water Forum: Rod Hall SWRCB: Juliana Spector Delta-Mendota/Westlands: Tom Boardman SMUD: Arthur Starkovich, Paul Olmstead PCWA: Ben Barker SARA: Felix Smith CFS: Kirsten Sellheim PSFMC: Eric Bradbury City of Folsom: Marcus Yasutake cbec: Chris Hammersmark DWR: Mike Ford

Handouts: • Agenda • American River Summary Conditions, Storage/Release Management Conditions, and Temperature Management (USBR) • Fisheries Update (CDFW) • Bi-weekly Spawning and Stranding Report (CFS) • Lower American River RST Catch Summary (PSMFC) • Upper American River Project Update (SMUD) • Reservoir Storage and Precipitation (SMUD) • MFP Ops Overview (PCWA) • Middle Fork Project – Snowpack and Reservoir Storage (PCWA) • Lake Spaulding (PCWA) • American River Basin Snow Sensor Index (PCWA) • Daily CVP Water Supply Report (USBR) • Temperature Control Report –January 1 through February 20 (USBR) • Folsom Lake Temperature profiles (USBR) • Folsom Lake Isothermobaths (USBR) • Folsom Cold Water Pool • iCPMM 90% Forecast Modeling • iCPMM 50% Forecast Modeling • 90% and 50% Runoff Exceedance Outlook (USBR) • Sign-in sheet

Fishery Update: • CDFW o Approximately 200,000 brood year 2018 Chinook salmon experimental release from Nimbus Fish Hatchery into the Lower American River took place on April 12. 100% marked (adipose fin clip) and Coded Wire Tagged (CWT). o Experimental release will help to increase survival. • Cramer Fish Sciences (CFS) - Bi-Weekly Spawning and Stranding Report o During spawning surveys conducted the week of April 2, a total of 2 steelhead and 2 lamprey redds were identified. o During the stranding survey conducted on March 19, a total of 30 stranding pools, 90 steelhead, and 3,190 Chinook were identified. • Pacific States Marine Fisheries Commission (PSMFC) - Lower American River RST Catch Summary o Total captures as of April 15 are 14,457 length-at-date (LAD) fall-run, 62 LAD spring- run, and 18 LAD winter-run Chinook salmon, and 41 LAD late fall-run Chinook salmon.

Operations Forecast: • SMUD o SMUD currently operating to meet minimum elevations. o There is less water in reservoir than this time last year because of the current snowpack o There is a high likelihood that flashboards will be installed this year. • PCWA o PCWA operating to keep reservoir levels low to attenuate future snowmelt. o Modeling shows about 30 thousand acre-feet (TAF) of spill. • CVO o Currently about 805 TAF of water in Folsom Reservoir. o CVO operating to make releases as flat as possible to avoid wide swings in flows

Temperature Management: • CVO o No foreseeable temperature management issues in May and June o TCD may need to be adjusted in July o Significant inflows in June expected o Higher releases in August may be required as a result of Fall X2 o September flows selected to avoid potential redd dewatering o Flows near 11,000 cubic feet per second (cfs) may be needed for salinity control o July through September releases selected to meet potential Delta needs o CDFW has requested a model run showing a 56F degree target by November 1st. Reclamation has stated it is not within their capabilities to provide such a model run.

Discussion • Upcoming presentation o May – Climate Change, Dr. Swain

Schedule Next Meeting The next meeting is scheduled to take place on Thursday, May 16th, 2019 at Central Valley Operations Office, 3310 El Camino Ave., Sacramento, CA 95821, in Room 302, at 1:30pm. State of California – Natural Resources Agency GAVIN NEWSOM, Governor DEPARTMENT OF FISH AND WILDLIFE CHARLTON H. BONHAM, Director North Central Region 1701 Nimbus Road Rancho Cordova, CA 95670 www.wildlife.ca.gov

Date: April 11, 2019

To: Distribution List

From: Jay Rowan Senior Environmental Scientist Supervisor-Hatcheries North Central Region

Subject: Planned release of brood year 2018 Chinook Salmon into the Lower American River at Sunrise Boat Ramp.

On April 12, 2019, the Department of Fish and Wildlife will release approximately 200,000 brood year 2018 Chinook salmon from Nimbus Fish Hatchery into the Lower American River at Sunrise Boat Ramp. This release will include 100% marked (adipose fin clip) and Coded Wire Tagged (CWT) fish (Table 1). This experimental early release will help to inform future decisions regarding the timing of in-river releases from the hatchery. For questions concerning this release, please contact Jay Rowan (916) 358- 2883

Table 1 – Planned release summary of Nimbus Fish Hatchery Chinook Salmon.

CWT Code Fork length Date Location Fish/lb. With Mark Total Fish or mark (mm)

Ad Clip 4/12/2019 Sunrise Boat Ramp 110 78 199,965 199,965 06/19/94

Conserving California’s Wildlife Since 1870 Bi-weekly Spawning and Stranding Report

Survey Week Steelhead Chinook Lamprey Unidentified Unknown Test Total 01/07/2019 5 1 0 3 11 0 20 01/21/2019 6 0 0 0 7 2 15 02/04/2019 7 0 0 0 12 1 20 02/18/2019 5 0 0 1 0 0 6 03/04/2019 0 0 0 0 0 0 0 04/02/2019 1 0 1 0 2 0 4 04/03/2019 0 0 0 0 0 0 0 Table 1. Different types of redds identified (Pre-DFA) during spawning survey

Survey Week # of Stranding Steelhead Chinook Pools 02/18/2019 9 5 90 03/04/2019 7 8 142 03/13/2019 24 7 1,367 3/19/2019 30 90 3,190 Table 2. Stranding survey data

Survey Week Steelhead Chinook Lamprey Unknown Test Total 01/07/2019 16 3 0 1 0 20 01/21/2019 11 2 0 0 2 15 02/4/2019 19 0 0 0 1 20 02/18/2019 0 0 0 0 0 0 03/04/2019 0 0 0 0 0 0 04/02/2019 2 0 2 0 0 4 04/03/2019 0 0 0 0 0 0 Table 3. Different types of redds identified (Post-DFA) during spawning survey

The next scheduled spawning survey will occur 16-18 April Lower American River RST Catch Summary Pacific States Marine Fisheries Commission

Charts summarize cumulative catch data through 4/15/2019 on the American river at the Watt Avenue location.

Thus far we have captured a total of 14,457 length-at-date (LAD) fall-run, 62 LAD spring-run and 18 LAD winterrun Chinook salmon, and 41 LAD late-fall run Chinook salmon.

Discharge data obtained from the USGS monitoring station at Fair Oaks

SMUD Upper American River Project Update

Conditions – 16 April 2019:

April precipitation through 4/16/2019 7:00:00 AM is 4.36 in., which is 90% of the April average of 4.84”. Precip for the water year to date is 62.16” which is 124% of average to date (50.00”) and 108% of the entire water year average of 57.32”.

Reservoir storage for Loon Lake, Union Valley and Ice House Reservoirs:

• 286,091 acre feet • 75% capacity • 104% historical average (16 April historical average: 275,969AF / 72.8%) • 4% storage increase since last week

Individual reservoir storage:

• Loon Lake: 34,847 AF • Ice House: 25,014 AF • Union Valley: 226,230 AF

Last year today, storage was at 92.4 % (350,218 AF).

*Total capacity of the three reservoirs is 379,174 acre feet.

March releases:

• 3,328 cfs average flows below Chili Bar • 204,658 total AF released below Chili Bar

April releases (Apr 1-16):

• 3904 cfs average flows below Chili Bar • 116,171 total AF released below Chili Bar

Runoff into the storage reservoir basins is 135% of median to date through Apr 15. The snowpack is 136% of average at selected snow sensors.

Operational notes: recreational (boating) flows on weekends, avoiding spill, snowpack peaked on April 1 (as is typical)

Historical Max. % from Average RESERVOIR Capacity Maximum Reservoir Spill last STORAGE (acre- Capacity Capacity Elevation Elevation week feet) (%) (%)

Loon Lake Reservoir 69,309 49% +5% 59% 6,380.3 6,410.0

Ice House Reservoir 43,496 55% +5% 66% 5,416.6 5,436.5

Union Valley Reservoir 266,369 84% +3% 75% 4,854.7 4,855.0

Total 379,174 74% +4% 71%

A year ago, we were at 91.6% of capacity.

% of Entire Precipitation to Normal Average PRECIPITATION % of average Water Year date (inches) (inches) Average

April 2019 3.81* 4.84 78.7% 6.6%

Water Year 61.61 49.19 125.2% 107.5%

* April precipitation through April 11, 2019 at 7:00 am

PCWA MFP OPERATIONS OVERVIEW for American River Operations Group April 18, 2019

 French Meadows Storage = 69,000 AF of 135,000 AF = ~51% Capacity

o MFAR above FM Inflow (R24) = ~500 cfs

 Hell Hole Storage = 94,000 AF of 207,590 AF = ~45% Capacity

o Five Lakes Inflow (R23) = ~225 cfs

o Rubicon Inflow (R22) = ~325 cfs

 Combined Storage (FM+HH) = 163,000 AF/342,590 AF = ~48% Capacity = ~77% of AVG

o 1975‐2016 AVERAGE for March 21st = 213,000 AF

 MFAR @ R11: Last 8 days AVG= 2,950cfs; peak=3,900cfs; min=2,000cfs

 ROAD CLOSURES:  Blacksmith Flat Road just above Ralston Powerhouse – 2017 slide reactivated – NO ETA  Major Slide 11 Pines Road – Closed ‐ NO ETA

Middle Fork Project – Snowpack and Reservoir Storage Lake Spaulding – Monthly Precipitation Lake Spaulding – Cumulative Precipitation Middle Fork Project – Reservoir Runoff American River Snow Sensor Index UNITED STATES DEPARTMENT OF THE INTERIOR U.S. BUREAU OF RECLAMATION-CENTRAL VALLEY PROJECT-CALIFORNIA DAILY CVP WATER SUPPLY REPORT APRIL 17, 2019 RUN DATE: April 18, 2019 RESERVOIR RELEASES IN CUBIC FEET/SECOND 15 YR RESERVOIR DAM WY 2018 WY 2019 MEDIAN TRINITY LEWISTON 1,392 6,980 310

SACRAMENTO KESWICK 3,140 21,027 5,522

FEATHER OROVILLE (SWP) 2,500 9,500 2,500

AMERICAN NIMBUS 5,534 7,597 3,211

STANISLAUS GOODWIN 1,504 4,003 1,409

SAN JOAQUIN FRIANT 350 496 350

STORAGE IN MAJOR RESERVOIRS IN THOUSANDS OF ACRE-FEET % OF 15 RESERVOIR CAPACITY 15 YR AVG WY 2018 WY 2019 YR AVG

TRINITY 2,448 1,825 1,935 2,144 117

SHASTA 4,552 3,748 4,138 4,064 108

FOLSOM 977 701 785 808 115

NEW MELONES 2,420 1,556 2,060 1,946 125

FED. SAN LUIS 966 752 907 944 125

TOTAL NORTH CVP 11,363 8,582 9,825 9,906 115

MILLERTON 520 322 475 279 87

OROVILLE (SWP) 3,538 2,599 2,291 3,044 117

ACCUMULATED INFLOW FOR WATER YEAR TO DATE IN THOUSANDS OF ACRE-FEET CURRENT 15 YR % OF 15 RESERVOIR WY 2019 WY 1977 WY 1983 AVG YR AVG TRINITY 849 99 1,353 715 119

SHASTA 5,030 1,508 7,667 3,674 137

FOLSOM 2,241 213 3,877 1,710 131

NEW MELONES 731 ---- 1,227 564 130

MILLERTON 778 115 1,793 604 129

ACCUMULATED PRECIPITATION FOR WATER YEAR TO DATE IN INCHES CURRENT AVG % OF LAST RESERVOIR WY 2019 WY 1977 WY 1983 (N YRS) AVG 24 HRS TRINITY AT 34.63 9.27 50.70 28.56 121 0.00 FISH HATCHERY ( 57) SACRAMENTO AT 79.16 11.04 103.04 56.00 141 0.00 SHASTA DAM ( 62) AMERICAN AT 80.19 15.64 94.98 60.16 133 0.00 BLUE CANYON ( 44) STANISLAUS AT 37.88 ---- 41.62 25.07 151 0.05 NEW MELONES ( 41) SAN JOAQUIN AT 50.56 11.50 74.10 37.51 135 0.27 HUNTINGTON LK ( 44) D Mean Daily Temperatures (°F) Release Storage Unit Shuter Position / Load Isobath Plot A Water Air (CFS) (TAF) Percentage T NFA ARP 1 AHZ AWP AWB CSU Nimbus Folsom Unit 1 Unit 2 Unit 3 >70 68-70 66-68 64-66 62-64 E AFD 60-62 58-60 56-58 54-56 52-54 Feb 43.7 43.9 47.1 47.0 47.5 47.9 47.3 10917 03/01 46.7 47.3 46.4 46.2 46.5 47.0 52.8 20047 592 T 5 T 47 T 48 50-52 48-50 46-48 <46 03/02 47.1 47.7 46.7 46.5 45.9 47.2 51.2 15900 591 T 5 T 47 T 48 03/03 47.2 49.0 46.7 46.8 45.9 47.6 54.4 15961 601 T 5 T 47 T 48 03/04 46.6 49.2 46.6 46.6 46.7 47.6 54.2 16083 615 T 5 T 47 T 47 03/05 46.7 48.5 47.0 46.9 46.4 47.6 53.1 16118 619 T 5 T 47 T 47 03/06 47.2 49.3 46.6 46.7 46.7 48.0 55.6 16165 627 T 5 T 47 T 47 Spillway Crest 03/07 46.7 48.8 47.3 46.9 46.9 47.7 51.9 16079 649 T 5 T 47 T 47 03/08 46.5 48.5 47.4 47.2 47.7 48.1 48.3 15940 659 T 5 T 47 T 47 All Shutters Lowered (A) 03/09 46.0 47.1 47.5 47.1 47.7 47.7 47.2 15985 659 T 5 T 47 T 47 03/10 45.9 47.0 47.2 47.5 48.4 48.3 50.8 15277 654 T 5 T 47 T 47 03/11 46.0 46.4 48.2 47.9 48.9 48.7 52.9 15456 645 T 5 T 47 T 47 03/12 46.3 45.7 47.9 48.0 49.1 49.0 53.5 12722 639 T 5 T 47 T 47 03/13 45.9 45.6 47.9 47.7 48.7 48.6 52.0 10459 634 T 5 T 48 T 47 Top Shutter Raised (T) 03/14 45.6 45.5 47.8 47.9 49.0 48.9 52.5 8647 631 T 5 T 47 T 48 03/15 46.1 45.8 47.8 47.9 49.2 49.2 53.6 7564 629 T 5 T 47 T 47 03/16 46.6 45.9 47.9 48.2 49.5 49.5 55.9 6684 630 T 5 T 48 T 47 Middle Shutter Raised (M) 03/17 46.9 46.0 47.8 48.4 49.8 49.9 ? 57.3 5873 633 T 5 T 48 T 47 03/18 47.7 46.6 47.7 48.4 50.0 50.1 59.8 5302 636 T 5 T 47 T 48 03/19 47.5 46.5 47.5 48.3 49.9 50.0 60.7 4916 642 T 5 T 47 T 47 Bottom Shutter Raised (B) 03/20 47.6 46.9 47.3 47.8 49.3 49.5 55.6 4804 642 T 6 T 47 T 47 03/21 47.5 47.8 47.8 47.6 49.2 49.4 53.6 4707 655 T 5 T 48 T 46 03/22 46.8 46.6 47.9 49.0 49.3 49.2 51.9 4869 660 T 5 T 47 T 48 03/23 47.0 47.9 47.9 49.0 49.6 49.8 54.8 5000 672 T 5 T 47 T 47 03/24 47.0 47.3 48.0 49.3 49.9 50.0 53.3 4887 681 T 5 T 47 T 47 03/25 46.6 46.3 47.7 49.1 49.5 49.5 54.7 4809 687 T 5 T 47 T 47 03/26 47.2 47.1 48.3 49.0 49.8 50.0 58.1 4810 692 T 6 A 51 A 43 03/27 47.8 48.6 48.1 49.8 50.2 50.3 56.6 4822 697 T 5 A 47 A 48 03/28 46.8 48.7 48.5 49.3 49.8 50.0 51.7 4815 707 T 5 A 47 A 48 03/29 46.8 48.2 49.2 49.7 50.2 50.2 53.4 4942 717 T 5 A 47 A 48 03/30 47.3 47.7 49.4 50.6 51.1 51.3 56.5 4948 725 T 5 A 47 A 47 Lower River Outlet 03/31 48.0 47.9 49.4 50.9 51.7 51.9 59.9 4810 735 T 5 A 45 A 49 Mar 46.8 47.3 47.7 48.1 48.8 49.1 54.1 9658 03/01 03/31 Total AF 593850 Legend Notes

? = 1-9 hours of data missing A = All Shutters Lowered 1 AFD is a weighted average using hourly flow values ! = 10 or more hours of data missing T = Top Shutter Raised 2 # = Station out of service M = Middle Shutter Raised 3 = Monthly Averages B = Bottom Shutter Raised 4 O = Unit Outage 5 6 D Mean Daily Temperatures (°F) Release Storage Unit Shuter Position / Load Isobath Plot A Water Air (CFS) (TAF) Percentage T NFA ARP 1 AHZ AWP AWB CSU Nimbus Folsom Unit 1 Unit 2 Unit 3 >70 68-70 66-68 64-66 62-64 E AFD 60-62 58-60 56-58 54-56 52-54 Mar 46.8 47.3 47.7 48.1 48.8 49.1 54.1 9658 04/01 48.6 47.7 49.5 51.0 51.4 51.5 59.5 4767 741 T 5 T 47 T 48 50-52 48-50 46-48 <46 04/02 48.5 48.6 49.0 50.6 51.1 ? 51.2 56.6 4798 754 T 5 T 47 T 48 04/03 48.0 49.5 49.0 50.3 51.0 51.1 57.7 4840 770 T 5 T 47 T 48 04/04 48.4 48.6 49.7 50.3 50.6 50.5 58.6 7955 778 T 5 T 47 T 48 04/05 48.2 48.3 49.8 50.9 51.1 50.9 55.5 9691 782 T 5 T 47 T 48 04/06 48.1 49.0 50.0 50.9 51.3 51.2 59.6 9658 782 T 5 T 48 T 47 Spillway Crest 04/07 ! - 49.7 50.0 51.4 52.0 52.1 63.8 9417 783 T 5 T 48 T 47 04/08 50.3 49.7 49.8 51.5 52.2 52.3 64.5 9402 787 T 5 T 48 T 48 All Shutters Lowered (A) 04/09 49.2 50.4 50.2 50.9 51.5 51.8 60.2 9330 798 T 5 T 48 T 47 04/10 47.1 49.7 51.6 52.6 52.7 52.3 ? 59.8 9379 804 T 5 T 48 T 48 04/11 47.2 48.2 51.1 52.7 53.1 53.0 60.8 9399 807 T 5 T 48 T 48 04/12 47.5 47.9 51.3 52.5 52.9 52.8 ? 61.3 9279 807 T 4 T 49 T 48 04/13 48.6 48.1 51.2 52.8 53.4 53.3 62.5 9133 805 T 5 T 48 T 48 Top Shutter Raised (T) 04/14 49.7 48.4 50.4 52.4 53.1 53.2 60.8 9122 804 T 5 T 48 T 48 04/15 49.6 48.1 50.2 50.9 51.3 51.3 53.0 9056 804 T 5 T 48 T 48 04/16 48.8 48.9 51.0 51.9 52.2 52.0 57.6 8638 806 T 5 T 47 T 48 Middle Shutter Raised (M) 04/17 49.7 49.0 51.1 52.7 53.3 53.4 61.6 7597 808 T 5 T 48 T 48 04/18 04/19 Bottom Shutter Raised (B) 04/20 04/21 04/22 04/23 04/24 04/25 04/26 04/27 04/28 04/29 04/30 Lower River Outlet - Apr 48.6 48.8 50.3 51.5 52.0 52.0 59.6 8321 04/01 04/30 Total AF 280582 Legend Notes

460

440 Spillway 420

400 Top - Top Shutters

380

360 Top - Middle Shutters

340 Top - Bottom Shutters

320 W S Intake

300 Power Penstocks Pool Elevation (Feet, msl) (Feet, Elevation Pool 280

260 Upper Tier River Outlets

240

220 Lower Tier River Outlets 200 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 Water Temperature (˚ F)

Site A Site B Site C Site D Site E Site Dam Folsom Lake Isothermobaths - 2019

1000 (Water Temperature, in ˚ F)

950

900

850

800 >70 750 68-70 700 66-68

650 64-66 62-64 600 60-62 550 58-60 500 56-58 54-56 Storage, in TAF 450 52-54 400 50-52 350 48-50 300 46-48 250 <46

200

150

100

0 1/1 1/22 2/12 3/5 3/26 4/16 5/7 5/28 6/18 7/9 7/30 8/20 9/10 10/1 10/22 11/12 12/3 12/24 Date Folsom Cold Water Pool

Folsom Reservoir: Cold Water Volume

Profile Date Volume less than 58oF (TAF) 04/16/19 795

Penstock Volume (TAF) Approximate Elevation (ft) Max. Temp (F) 47.8 327 83

Proposed Power Generation Bypass/Lower River Outlet for Temperature Management

Date Bypass/Lower River Temperature not to Cumulative Use of Outlet (cfs) exceed downstream Cold Water Pool of Nimbus Dam (oF) Volume (TAF)

5/2/2019

Temperature Schedule = 26 Apr 2019 Updated Apr Inflow 90%-Exceedance Outlook 9/30 - CWP<60˚ (TAF, Constraint = 0) = 130 9/30 - Folsom Storage (TAF) = 631 USBR Pred. Number of Excursions = 4 Max. Target Temp. = 66˚

A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-S A-A-A-S A-A-A-S A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-1-N A-1-1-N A-1-1-N A-1-1-N 1-1-1-N 1-1-1-N 1-1-2-N 1-1-2-N 1-2-2-N 1-2-2-N 2-2-3-N 2-2-3-N 2-2-3-N 2-2-3-N 2-3-3-N 2-3-3-N 2-3-3-N 2-3-3-N 2-3-3-N 2-3-3-N 2-3-3-N 2-3-3-N 2-3-3-N 2-3-3-N 3-3-3-N 3-3-3-N 3-3-3-N 80 16000 All Down 1 Up 2 Up 14000 3 Up Spillway 70 Upper 12000 Lower Shortage 10000 Total Folsom Storage CWP60 Buffered Temp. Target 60 8000 Target Temp. - Watt Ave. Modeled Temp. - Folsom Modeled Temp. - Nimbus 6000 Modeled Temp. - Watt Ave. Air Temp. 50 4000 (°F) Temperature

2000 Release (cfs) / Volume (TAF) (cfs) / Volume Release 0 40 1/7 2/4 3/4 4/1 4/8 5/6 6/3 7/1 7/8 8/5 9/2 9/9 1/14 1/21 1/28 2/11 2/18 2/25 3/11 3/18 3/25 4/15 4/22 4/29 5/13 5/20 5/27 6/10 6/17 6/24 7/15 7/22 7/29 8/12 8/19 8/26 9/16 9/23 9/30 10/7 11/4 12/2 12/9 10/14 10/21 10/28 11/11 11/18 11/25 12/16 12/23 12/30 Date 5/2/2019

Temperature Schedule = 22 Apr 2019 Updated Apr Inflow 50%-Exceedance Outlook 9/30 - CWP<60˚ (TAF, Constraint = 0) = 104 9/30 - Folsom Storage (TAF) = 742 USBR Pred. Number of Excursions = 6 Max. Target Temp. = 65˚

A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-N A-A-A-S A-A-A-S A-A-A-S A-A-A-S A-A-A-S A-A-A-S A-A-A-S A-A-A-S A-A-A-N A-A-A-N A-A-A-N A-A-1-N A-1-1-N 1-1-1-N 1-1-2-N 1-1-2-N 1-1-2-N 1-1-2-N 1-2-2-N 1-2-2-N 2-2-3-N 2-2-3-N 2-2-3-N 2-2-3-N 2-2-3-N 2-2-3-N 2-2-3-N 2-2-3-N 2-3-3-N 2-3-3-N 2-3-3-N 2-3-3-N 2-3-3-N 2-3-3-N 2-3-3-N 2-3-3-N 2-3-3-N 2-3-3-N 80 16000 All Down 1 Up 2 Up 14000 3 Up Spillway 70 Upper 12000 Lower Shortage 10000 Total Folsom Storage CWP60 Buffered Temp. Target 60 8000 Target Temp. - Watt Ave. Modeled Temp. - Folsom Modeled Temp. - Nimbus 6000 Modeled Temp. - Watt Ave. Air Temp. 50 4000 (°F) Temperature

90% Runoff Exceedance Outlook:

Inflow based on 90% historical average runoff for all months.

Federal End of the Month Storage/Elevation (TAF/Feet) Apr May Jun Jul Aug Sep Folsom 735 871 932 966 852 667 611 Elev. 456 462 465 454 436 430 Monthly River Releases (cfs) American 7500 6000 4000 3634 4653 2500 MRR 1750 1750 1750 1750 1750 1750

50% Runoff Exceedance Outlook:

Inflow based on 50% historical average runoff for all months.

Federal End of the Month Storage/Elevation (TAF/Feet) Apr May Jun Jul Aug Sep Folsom 735 841 927 938 904 715 704 Elev. 453 461 462 459 441 440 Monthly River Releases (cfs) American 8000 9000 6000 3000 4835 2000 MRR 1750 1750 1750 1750 1750 1750

Please note: CVP actual operations do not follow any forecasted operation or outlook; actual operations are based on real-time conditions.

CVP operational forecasts or outlooks consider general system-wide dynamics and do not necessarily address specific watershed/tributary details. CVP releases represent monthly averages. CVP operations are updated monthly as new hydrology information is made available December through May. Shaded area represents less confident hydrologic inputs of the future water year.

4/18/2019