Water Supply UpdateWater Supply Update

Board of Directors Meeting

February 25, 2020

Water Supply Briefing

• Current Water Supply

• California Water Supply

• Water Supply Projections

2

Current Water SupplyGross Water Production

3

0.04 0.03

0.950.30

2.85

11.30

2.70

0.190

2

4

6

8

10

12

JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN

AverageRainfall Year 2020

Current Water SupplyMokelumne Precipitation

4

Through Feb 23: 18.36” (57% of average)

0.00 0.000.25

0.00

1.25

4.66

1.94

0.000

1

2

3

4

5

6

JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN

AverageRainfall Year 2020

Current Water SupplyEast Bay Precipitation

5

Through Feb 23: 8.10” (43% of average)

6

Current Water SupplyCaples Lake Snow Depth

0

20

40

60

80

100

120

140

160

Oct Nov Dec Jan Feb Mar Apr May Jun

Snow

Dep

th (i

n)

Historical AverageWY2015WY2019WY2020

Current Water SupplySnow

7

Current Water SupplySnow

8

As of Feb. 23, 2020 Cumulative Precipitation

% ofAverage

Caples Lake Snow Depth 44” 60%Caples Lake Snow Water Content 17.20” 67%

Current Water SupplyReservoir Storage

As of 2/23/2020

Current Storage

Percent of Average

Percent of Capacity

Pardee 182,000 AF 100% 89%Camanche 289,440 AF 107% 69%East Bay 129,850 AF 98% 86%Total System 601,290 AF 103% 78%

9

California Water SupplyAutomated Sensor Snow Water Equivalents

10

Caples Lake Snow Water Content54%

48%

44%

Data for: 23-Feb-2020

% Normal for this Date

Statewide Average: 49%

Year% of Normal

on February 23

2018 19%

2019 178%

2020 67%

Water Supply ProjectionsMokelumne Precipitation Rainfall Year 2020

11

10% Exceedance (Wet)

90% Exceedance (Dry)

50% Exceedance (Median)

RY2020 to-date:18.36”

Wettest of Record, 87.1” (RY83)

Average, 48.3”

Driest of Record, 23.0” (RY77)

630 TAF

570 TAF

500 TAF

300

350

400

450

500

550

600

650

700

750

800

Jul-19 Aug-19 Sep-19 Oct-19 Nov-19 Dec-19 Jan-20 Feb-20 Mar-20 Apr-20 May-20 Jun-20 Jul-20 Aug-20 Sep-20 Oct-20

Tota

l Sys

tem

Sto

rage

(TA

F)

Total System Storage WY2020

Water Supply ProjectionsProjected 2020 EBMUD Total System Storage

12

10% and 50% Exceedance

90% Exceedance

13

Questions ?

Elevation +Gain +Gain Elevation Storage Release SpillMOKELUMNE Feet -Loss Ac-Ft -Loss Feet Ac-Ft Cfs Cfs Pardee 557.51 -0.01 181980 -20 567.65 203795 14 0 Camanche 216.87 -0.11 288740 -700 235.5 417120 330 0EAST BAY Briones 570.83 -0.05 55290 -30 576.14 58960 0 0 Chabot 223.65 -0.01 9160 0 227.25 10350 0 0 Lafayette 437.82 0 2920 0 449.16 4250 0 0 San Pablo 303.7 0.02 30070 20 313.68 37915 0 0 Upper San Leandro 451.02 0 32400 0 459.98 38905 0 0

129840 -10 150380

600560 -730 771295

Storage Operating MGMG Capacity Line 1 27.7

331 720 Line 2 35.8321 Line 3 85.9

10 TOTAL 149.4FSCC to MOK AQUEDUCTS (Measured at Brandt), MG

Million Capacity Mok 1 0Gallons MGD Mok 2 0

0 25 0 MG120 190 Cfs

0 30 3470 50 2410 45 14

40.7 90 0330

160.7 4300.4

161.1 Maximum10 Storage Change Capacity

0.9 4637 -30 26560

150.2 16198 81 14185739.4 9668 160 52025

110.8 30503 211 220442

INPUTBriones Res. 0 34San Pablo Res. 0 0 This Season Season SeasonU. San Leandro Res. 0 0 Today Month to-Date to-Date Total

0 0 8.42 18.04 25.33TOTAL 0 34 0 0 11 22.65 32.06REMARKS 0 0 7.77 20.2 28.18

0 0 9.11 16.69 23.020 0 9.28 14.36 21.560 0.14 18.09 30.42 45.51

Today44 Inches

17.1 Inches

PRECIPITATION (Inches)

Total

Lafayette WTP

THROTTLE

Total Change

Walnut Creek WTP

Mokelumne River Natural FlowPardee Reservoir Inflow

RIVER FLOWS AND RELEASES

WATER PRODUCTION

AVERAGE YEARTHIS YEAR

Orinda WTPSan Pablo WTP

Pardee Release to Camanche Res.Sobrante WTP

Pardee Release to JVIDUpper San Leandro WTP

Camanche Release to Mokel. River

Total Previous Day THROTTLE

MOKELUMNE SYSTEM

Today

Total East Bay Res.

AND DEMAND

THROTTLE

231 Cfs

DISTRIBUTION RESERVOIRS AQUEDUCT DELIVERIES

Flow Conditions

TOTAL SYSTEM STORAGE

DISTRIBUTION SYSTEM

WATER SUPPLY ENGINEERING DAILY REPORTMonday, February 24, 2020

RESERVOIR STORAGE AND ELEVATION

STORAGE MAXIMUM CAPACITYWATER SURFACE

East-of-Hills Demand

TOTAL WATER PRODUCTION

Old Reservoirs Change in Distribution System

Lower Bear Res. Salt Springs Res.

Wash Water from Distribution Sys.

RAW WATER TRANSMISSION Ac-ft

PG&E CO. STORAGE (Acre-feet)TOTAL SURFACE PRODUCTION Miscellaneous(Estimated)

West-of-Hills Demand

SYSTEM DEMAND

25.9 Inches

DRAFT

Average

Camp Pardee Salt Springs P.H.

PG&E data as of 4:00 pm previous date.

WID Canal Diversion = 0 cfsMokelumne River below WID = 292 cfs

WTP capacities are sustainable rates.

Walnut Creek WTP

EAST BAY MUNICIPAL UTILITY DISTRICT

All other data as of midnight. Snow Depth Water Content

CAPLES LAKE (7,830 FT) DATA

74 Inches

STATION

Orinda WTP USL WTP

Lafayette Reservoir