Water Operations Report Murray-Lower Darling June 2018 Dam Storages

Dartmouth Dam Storage 2013/14 2014/15 2015/16 2016/17 2017/18 110%

100%

90%

80%

70%

60%

50%

40%

30%

20%

10%

0% Jul Aug Sept Oct Nov Dec Jan Feb Mar Apr May Jun

June 2018 Murray – Lower Darling Water System Operations Report 2 Dam Storages

Hume Dam Storage 2013/14 2014/15 2015/16 2016/17 2017/18 110%

100%

90%

80%

70%

60%

50%

40%

30% Year-to-date Inflow: 20% - Unregulated – 1,135 GL 10% - Dartmouth Transfers – 134 GL

0% Jul Aug Sept Oct Nov Dec Jan Feb Mar Apr May Jun

June 2018 Murray – Lower Darling Water System Operations Report 3 Dam Storages

Lake Victoria Storage 2013/14 2014/15 2015/16 2016/17 2017/18 110%

100%

90%

80%

70%

60%

50%

40%

30%

20%

10%

0% Jul Aug Sept Oct Nov Dec Jan Feb Mar Apr May Jun

June 2018 Murray – Lower Darling Water System Operations Report 4 Dam Storages

Menindee Lakes Storage 2013/14 2014/15 2015/16 2016/17 2017/18 110%

100%

90%

80%

70%

60%

50%

40%

30%

20%

10%

0% Jul Aug Sept Oct Nov Dec Jan Feb Mar Apr May Jun

June 2018 Murray – Lower Darling Water System Operations Report 5 Supplementary Access

There has been one event in 2017/18

Murray River Dates Available Total Usage Colligen/Neimur System Dates Available Total Usage to Yarrawonga Weir Not Available Above Colligen Creek Regulator Not Available Colligen Creek Regualtor to Yarrawonga Weir to Barmah Bridge Not Available Not Available Barmah Bridge to Torumbarry Weir Not Available Barham/ Rd Torumbarry Weir to Barham Not Available Barham/Moulamein Rd to Mallen School Not Available Barham to Swan Hill Not Available Mallan School to Confluence Not Available Swan Hill to Murrumbidgee Junction Not Available Wakool/Yallakool System Dates Available Total Usage Wakool Offtake to Barham/Moulamein Rd Not Available Murrumbidgee Junction to Wentworth 22-Dec - 26 Dec 0 Barham/Moulamein Rd to Gee Gee Bridge Not Available (Includes Darling Weir pool) Gee Gee Bridge to Coonamit Bridge Not Available Wentworth Weir to Sotuh Australian 22-Dec - 27 Dec 0 Coonamit Bridge to Stoney Crossing Not Available Border Stoney Crossing to Murray Junction Not Available Not Available Yallakool Creek Offtake to Wakool Dates Available Total Usage Not Available confluence Edward River Offtake to Stevens Weir Not Available Merran Creek System Dates Available Total Usage (Including Gulpa Creek) Offtake Regulators to Swan Not Available Stevens Weir to Moulamein Not Available Hill/Moulamein Rd Moulamein to Wakool Junction Not Available Waddy Creek and Cabool System Not Available Swan Hill/Moulamein Rd to Wakool Not Available Confluence

June 2018 Murray – Lower Darling Water System Operations Report 6 2017/18 Water Availability NSW Murray Sum of Sum of Sum of Sum of Share Sum of AWD Sum of Allocation Allocation Sum of Sum of UCF Licence Category Account Component Volume Carryover In Assignments Assignments Usage Usage Balance In Out DOMESTIC AND STOCK 13,756 5,601 13,756 - - - 8,155 - DOMESTIC AND STOCK [DOMESTIC] 1,248 594 1,247 - - - 653 - DOMESTIC AND STOCK [STOCK] 2,068 1,343 2,068 - - - 725 - LOCAL WATER UTILITY 33,497 14,165 33,497 - - 1,358 17,974 - REGULATED RIVER (CONVEYANCE) 330,000 808 230,340 - 71,086 50,554 250,064 -

REGULATED RIVER (GENERAL SECURITY) 1,675,186 559,365 853,627 730,350 541,903 425,348 1,141,838 -

REGULATED RIVER (HIGH SECURITY) 194,458 17,381 184,017 - 82,404 143,191 112,467 - REGULATED RIVER (HIGH SECURITY) [COMMUNITY AND 47 47 47 - - - - - EDUCATION] REGULATED RIVER (HIGH SECURITY) [RESEARCH] 801 801 801 - - - - - REGULATED RIVER (HIGH SECURITY) [TOWN WATER SUPPLY] 3,195 - 3,195 - - - 3,195 - SUPPLEMENTARY WATER 252,579 252,579 252,579 - - - - - TOTAL 2,506,836 852,683 1,575,174 730,350 695,392 620,451 1,535,071 - General Security Available Water Determination Of the total use, 262 GL is use from Date AWD ML/Share Total % July-17 0.13 13% environmental licences – this does not Sept-17 0.15 28% include any e-water use on private Oct-17 0.02 30% landholdings. In addition, the Murray Nov-17 0.05 35% Dec-17 0.11 46% Additional Allowance – 5,812 ML has been 15-Jan-18 0.03 49% delivered in July 2017. 15-Mar-18 0.02 51% Data as at 25 June 2018

June 2018 Murray – Lower Darling Water System Operations Report 7 2017/18 Water Availability Lower Darling

Sum of Sum of Sum of Sum of Sum of Sum of Share Sum of Allocation Sum of Licence Category Account AWD Allocation UCF Component Carryover In Assignments Usage Balance Volume Assignments In Usage Out DOMESTIC AND STOCK 335 267 335 - - - 68 -

DOMESTIC AND STOCK [DOMESTIC] 424 358 424 - - - 66 -

DOMESTIC AND STOCK [STOCK] 612 587 612 - - - 25 -

LOCAL WATER UTILITY 10,135 3,461 10,135 - - - 6,674 -

REGULATED RIVER (GENERAL SECURITY) 79,507 13,066 79,507 65,997 88,363 124,817 92,383 -

REGULATED RIVER (HIGH SECURITY) 7,771 575 7,771 - 768 5,013 2,951 -

SUPPLEMENTARY WATER 250,000 250,000 - - - - - 250,000 TOTAL 348,784 268,314 348,784 65,997 89,131 129,830 102,166 -

General Security Available Water Determination Date AWD ML/Share Total % 1-Jul-16 1 100%

Of the total use, 25.8 GL is use from environmental licences. Data as of 25 June 2018

June 2018 Murray – Lower Darling Water System Operations Report 8 2017/18 Water Availability NSW Murray

June 2018 Murray – Lower Darling Water System Operations Report 9 Resource Assessment NSW Murray

Resource Distribution for 2017-18 15/05/2018 15/04/2018 15/03/2018 15/02/2018 1/02/2018 15/01/2018 15/12/2018 1/12/2018 15/11/2017 01/11/2017 01/10/2017 01/09/2017

Total available resource 2625 2560 2550 2370 2350 2350 2292 2120 2050 1,980 1,740 1,540

Less

Carryover 730 730 730 730 730 730 730 730 730 730 730 690

Rules based environmental water 390 334 309 284 264 264 264 264 264 263 76 76

Essential supplies 54 54 54 54 54 54 54 54 54 54 54 54 (towns, stock, domestic)

Announced high security subcategory 1 1 1 1 1 1 1 1 1 1 1 1 (education, research) AWD

Announced high security AWD 184 184 184 184 184 184 184 184 184 184 184 184

Conveyance 230 230 230 228 228 228 224 215 210 206 202 191

Reserves 61 61 61 61 61 61 61 19 21 7 7 9

Announced general security AWD 854 854 853 828 828 828 774 653 586 535 486 335

2018/19 high priority requirements 121 112 128 ------commencing 1 July 2018

June 2018 Murray – Lower Darling Water System Operations Report 10 IVT Account

June 2018 Murray – Lower Darling Water System Operations Report 11 IVT Account

June 2018 Murray – Lower Darling Water System Operations Report 12 6 Month Rainfall

June 2018 Murray – Lower Darling Water System Operations Report 13 12 Month Rainfall

June 2018 Murray – Lower Darling Water System Operations Report 14 Storage Inflows

Dartmouth Dam - 6 month inflows/statistical 300 inflows 99 percentile Inflows are consistent with rainfall 250 75 percentile trends over the past 6 month 50 percentile 200 period. Actual inflow for the 6 25 percentile 150 Actual Inflow months is 148 GL just below the th 100 50 percentile inflows (168 GL):

InflowVolume (GL) while the minimum is 36 GL. 50

0 Dartmouth Dam - 12 month inflows/statistical Dec-17 Jan-18 Feb-18 Mar-18 Apr-18 May-18 1200 inflows 99 percentile 1000 Inflows are consistent with rainfall 75 percentile 800 50 percentile trends over the past 12 month 25 percentile 600 period. Actual inflow for the 12 Actual Inflow months is 554 GL just below 75th 400 percentile (603 GL): while the InflowVolume (GL) 200 minimum is 166 GL. 0

June 2018 Murray – Lower Darling Water System Operations Report 15 Storage Inflows

Hume Dam - 6 month inflows/statistical inflows 700 99 percentile Inflows are below rainfall trends 600 75 percentile over the past 6 month period. 500 50 percentile Actual inflow for the 6 months is 400 25 percentile th Actual Inflow 253 GL just above the 90 300 percentile inflows (226 GL): while 200

InflowVolume (GL) the minimum is 35 GL. 100

0 Dec-17 Jan-18 Feb-18 Mar-18 Apr-18 May-18 Hume Dam - 12 month inflows/statistical inflows 4000 99 percentile Inflows are below rainfall trend 3500 75 percentile 3000 over the past 12 month period. 50 percentile 2500 25 percentile Actual inflow for the 12 months is 2000 Actual Inflow 1,183 GL just above 90th 1500 1000

percentile (1,050 GL): while the InflowVolume (GL) 500 minimum is 124 GL. 0

June 2018 Murray – Lower Darling Water System Operations Report 16 Storage Inflows

Menindee Lakes - 6 month inflows/statistical inflows 2000 There has been no inflow to 1800 99 percentile 1600 75 percentile Menindee Lakes System in the 1400 50 percentile past 6 months. Actual inflow for 1200 25 percentile 1000 Actual Inflow the 6 months is 0 GL; the 800 minimum is 0 GL, while the 50th 600

InflowVolume (GL) 400 percentile is 428 GL. 200 0 Dec-17 Jan-18 Feb-18 Mar-18 Apr-18 May-18 Menindee Lakes - 12 month inflows/statistical 3500 inflows Inflows over the past 12 months 99 percentile 3000 75 percentile have been very low with 31 GL; 2500 th 50 percentile 50 percentile inflows are 797 GL; 2000 25 percentile while the minimum is 0 GL. 1500 Actual Inflow 1000

InflowVolume (GL) 500

0

June 2018 Murray – Lower Darling Water System Operations Report 17 Tributary Inflows

Total Tribs - 6 month inflows/statistical inflows 4000 99 percentile 3500 Inflows are below rainfall trends 75 percentile 3000 over the past 6 month period. Actual 50 percentile 2500 25 percentile inflow for the 6 months is 1,002 GL, 2000 Actual Inflow between 75th and 90th percentile 1500 inflows (798 – 1,190 GL): while the 1000 InflowVolume (GL) minimum is 275 GL. 500 0 Dec-17 Jan-18 Feb-18 Mar-18 Apr-18 May-18 Total Tribs - 12 month inflows/statistical inflows 8000 99 percentile Inflows are consistent with rainfall 7000 75 percentile 6000 over the past 12 month period. 50 percentile 5000 25 percentile Actual inflow for the 12 months is 4000 th th Actual Inflow 3,031 GL between 50 to 75 3000 2000

percentile (2,266 - 4,223 GL): while InflowVolume (GL) the minimum is 575 GL. 1000 0

June 2018 Murray – Lower Darling Water System Operations Report 18 Storage Forecast

Dartmouth Dam - Forecast Storage Capacity 110%

100%

90%

80%

70%

60%

50%

40% Storage Capacity Storage Capacity (%) Actual 30% Extreme dry scenario 20% (99%) Dry scenario (90%) 10% Near average scenario (50%)

0%

15 16 17

15 16 16 17 17 18

18 16 17

01-Jul- 01-Jul- 01-Jul-

01-Oct- 01-Apr- 01-Oct- 01-Apr- 01-Oct- 01-Apr-

01-Jan- 01-Jan- 01-Jan-

June 2018 Murray – Lower Darling Water System Operations Report 19 Storage Forecast

Hume Dam - Forecast Storage Capacity 110% Actual 100% Extreme dry scenario (99%) 90% Dry scenario (90%) Near average scenario 80% (50%) Wet scenario (25%) 70%

60%

50%

40% Storage Capacity Storage Capacity (%)

30%

20%

10%

0%

15 16 16 17 17 18

16 17 18

01-Oct- 01-Apr- 01-Oct- 01-Apr- 01-Oct- 01-Apr-

01-Jan- 01-Jan- 01-Jan-

01-Jul-15 01-Jul-16 01-Jul-17

June 2018 Murray – Lower Darling Water System Operations Report 20 Storage Forecast

Lake Victoria - Forecast Storage Capacity 110%

100%

90%

80%

70%

60%

50%

40%

Storage Capacity Storage Capacity (%) Actual

30% Extreme dry scenario (99%) Dry scenario (90%) 20% Near average scenario 10% (50%) Wet scenario (25%)

0%

16 17 18

01-Jan- 01-Jan- 01-Jan-

01-Jul-15 01-Jul-16 01-Jul-17

01-Apr-16 01-Oct-15 01-Oct-16 01-Apr-17 01-Oct-17 01-Apr-18

June 2018 Murray – Lower Darling Water System Operations Report 21 Storage Forecast

Menindee Lakes - Forecast Storage Capacity 120% Actual 110% Extreme dry scenario (99%) 100% Dry scenario (90%)

90% Near average scenario (50%) Wet scenario (25%) 80%

70%

60%

50%

Storage Capacity Storage Capacity (%) 40%

30%

20%

10%

0%

16 17 18

01-Jan- 01-Jan- 01-Jan-

01-Jul-15 01-Jul-16 01-Jul-17

01-Oct-15 01-Apr-16 01-Oct-16 01-Apr-17 01-Oct-17 01-Apr-18

June 2018 Murray – Lower Darling Water System Operations Report 22 System Outage Plan

Dam maintenance impacting supply • Planned outage – none

Weirs • Planned outage – Stevens Weir – Winter 2018

Regulators • Planned outage – none

June 2018 Murray – Lower Darling Water System Operations Report 23 System Operations Plan

• Murray – Lake is currently 4.5 m below the normal operating level. The lake is expected to remain around this level until mid-July to manage the invasive water weed Egeria densa. – During June, release from Yarrawonga weir is targeting a minimum flow rate of 4,000 ML/day to benefit native fish. Additional water is being released from Hume Dam, at the request of environmental water holders to maintain this flow target when inflows from the Kiewa and Ovens Rivers are low. – Edward River regulator is currently fully open, while Gulpa Creek regulator is controlling flow when necessary to maintain a maximum of 250 ML/day. This is providing low creek levels to assist National Parks repair works to the Gulpa Creek cutting through the Reed Bed Swamp area. – Stevens Weir is currently undergoing winter maintenance, with the gates raised from the water and the weir pool fully drawdown. Refilling is expected to commence in mid-July. – A winter pulse will be delivered from the Goulburn River in early July at request of environmental water holders. The aim is to provide outcomes for aquatic biota and vegetation along the Goulburn River and downstream to the Murray Mouth. – Torrumbarry Weir and Euston Weir are currently 30 cm below full supply level, and will be raised back to full supply prior to the irrigation season commencing. – Lake Victoria is currently rising, with the capture of water arriving from the drawdown.

June 2018 Murray – Lower Darling Water System Operations Report 24 System Operations Plan

• Lower Darling – Storage is approaching 200 GL total storage – 170 GL in Weatherall and Pamamaroo. – Releases are targeting 140 ML/day at Weir 32 in accordance with operating plan. – Releases from Cawndilla ceased at the end of March, with the storage now holding 35 GL. – Works have been put in place to separate Lake Tandure from Lake Wetherell, and pumping from Tandure to Wetherell has occurred, but has temporarily ceased with the arrival of flow into the storage. – Current inflows are the result of 23 GL of water released from the Border River and Gwydir River. This is forecast to provide 2-4 GL of water into storage. – Drought works – including construction of block banks downstream of Pooncarrie are expected to be delivered in coming weeks. Further in formation of drought management is provided at waternsw.com.au/__data/assets/pdf_file/0006/129831/Lower-Darling- Operational-Plan-December-2017.pdf

June 2018 Murray – Lower Darling Water System Operations Report 25 Prognosis Indicative allocations on 1 July 2018 – Lower Darling • In the absence of significant inflows the management focus in 2018-19 will be to preserve the longevity of water supply through next summer, and ensure town water supply for Broken Hill while the Wentworth to Broken Hill pipeline project is completed. • Full allocation can be expected on 1 July for towns, domestic, stock and high security water licences and access to carryover will be available. • Opening general security allocation is expected to be zero, but will continue to be reviewed based on updated forecasts for inflows. • In the event of low or no inflows to the Menindee system, there will be difficulty delivering resources in the latter part of 2018-19. • In past drought management, access to water has been regulated through statutory water restrictions, limiting use to things like domestic, stock and town water supply. The need for such actions will be constantly reviewed during the year. Indicative allocations on 1 July 2018 – NSW Murray • Full allocation for towns, domestic, stock and sub-category high security water licences and access to carryover will be available. • High security access licences will receive 97% allocation in accordance with the water sharing plan. • Full access to carryover water in private accounts will be available on 1 July. • It is likely that general security allocation will commence at 0%.

June 2018 Murray – Lower Darling Water System Operations Report 26 Prognosis Chances of Improvement – NSW Murray The chances of improved General Security allocation, based on different inflow scenarios are as follows:

NSW Murray Potential Inflow Conditions General Security AWD (%) 1-Sep-18 1-Nov-18

Extreme Dry (99% inflows: 99 0 0 chances in 100) Very Dry (90% inflows: 90 0 8 chances in 100) Dry (75% inflows: 75 1 28 chances in 100) Average (50% inflows: 50 10 40 chances in 100)

June 2018 Murray – Lower Darling Water System Operations Report 27