29 October 2021
Bellevue Gold – Licence Renewal Request for Information
Thankyou for your letter dated 28 th October 2021. I have attached a copy of the formal approval for Amber Stanton (BGL Company Secretary) to sign the application. I have also attached a copy of the latest ASIC company extract.
For the third point, a copy of the proposed water balance from 2020 has been included, along with the actual water discharge data for the period and the water balance for the 2022 year. The figure of
59,000KL is a typing error and there remains 89,000kl capacity within the pits. The planned water balance matches closely with the actual data, and Bellevue has demonstrated that over the discharge period, water can be managed in a sustainable manner.
For this licence renewal Bellevue plans to discharge water to the Henderson, Westralia and Vanguard Pits. There is a plan at some stage in 2022 (subject to EPA referral determination) to dewater the Vanguard pit, and to store water within a newly created pond. These plans do not form part of the current licence application, and were included for information only, rather than being requested for approval.
The licence being applied for at this stage will be the same as the current licence, with the annual dewatering volume the same, as well as the proposed dewatering RL. The new licence will enable Bellevue to undertake maintenance dewatering only, while the Project is undergoing EPA assessment (assuming a level of assessment is set).
Should the Project require further dewatering infrastructure, such as the pond, this will be applied for when required. But for the purpose of this licence renewal, there are no changes planned to the current approved dewatering system. The annual dewatering volume will remain the same and the depth to dewater will also remain the same.
The capacity of each pit for storage is included within the water balance. The proposed vs actual dewatering has shown that the ongoing dewatering for maintenance can be done in a manner that is sustainable, given the high rates of evaporation in the area. The Project is also actively managing dust across the roads and waste dumps which is being undertaken as per the past approval. For clarity and as shown in the water balance table attached, dewatering the approved volume requirements over the period can safely be stored within the current available capacity of the pits.
In the diagram on Page 3, the turkey’s nest is included as a discharge point, because it forms part of the
dewatering pipeline infrastructure. No water from the underground is sent to this turkey’s nest, and this
is currently fed from an adjacent bore that it utilised as required. The capacity of the turkey’s nest is around 20Kl and does not form part of the greater dewatering infrastructure.
Table 1 – Volume discharge November 2020 to October 2021
Table 2 – Volume discharge November 2020 to October 2021
Please contact me if you have any queries.
Yours sincerely
Date Henderson Westralia Vanguard
3/11- 19/11 38,318 31/01-8/02 21,902
9/2- 13-02 9,865
14/02- 19-02 12,621
20/02- 25/04 122,183
26/-04- 27/04 4,322
28/04- 24/05 50,871
25/05- 10/06 31,399
11/06- 7/07 46,263
8/7- 24/7 27,020
57/07- 12/08 30,076
13/08- 31/08 30,857
1/9-10/09 13,034
11/09- 18/09 9,994
19/09- 28/09 13,573
29/09- 30/09 950 1/10- 26/10
27/10-28/10 1,666
Total Per Pit 323,004 87,669 54,241 Total To Date 464,914
Pump Off
Nov-21 Dec-21 Jan-22 Feb-22 Mar-22 Apr-22 May-22 Jun-22 Jul-22 Aug-22 Sep-22 Oct-22 Nov-22
31
31 28 31 30 31 30 31 31 30 30 30 Storage (kL)
Henderson Pit 314,000 314,000 314,000 314,000 314,000 314,000 314,000 314,000 314,000 314,000 314,000 314,000 314,000 Westralia Pit 147,000 147,000 147,000 147,000 147,000 147,000 147,000 147,000 147,000 147,000 147,000 147,000 147,000 Vanguard Pit 166,000 166,000 166,000 166,000 166,000 166,000 166,000 166,000 166,000 166,000 166,000 166,000 166,000 Total 627,000 627,000 627,000 627,000 627,000 627,000 627,000 627,000 627,000 627,000 627,000 627,000 627,000 Storage Capacity 26,317 27,950 29,160 33,210 41,754 39,665 44,645 31,239 16,950 22,224 62,814 106,817 164,254 Pit Balance (kL)
Henderson Pit 306,000 306,000 306,000 306,000 306,000 287,652 314,000 314,000 314,000 314,000 314,000 314,000 314,000 Westralia Pit 142,000 140,367 139,157 135,107 126,563 147,000 147,000 147,000 147,000 147,000 147,000 147,000 147,000 Vanguard Pit 152,683 152,683 152,683 152,683 152,683 152,683 153,164 166,570 180,859 175,584 134,995 90,992 33,555 Underground Dewatering
Abstraction from Underground (kL) 5,000 10,000
To maintain water level (kL) 36,900 38,130 38,130 34,440 38,130 36,900 38,130 36,900 38,130 38,130 36,900 36,900 36,900 Pit Water Movement (kL)
Rainfall - 532 8,067 1,609 10,462 859 36 415 230 1,040 387 1,040 - Evaporation 13,773 14,607 14,982 10,828 11,238 7,974 4,495 3,261 3,370 4,495 6,525 10,112 13,773 Seepage 15,000 15,500 15,500 14,000 15,500 15,000 15,500 15,000 15,500 15,500 15,000 15,500 15,000 Total Loss 28,773 29,575 22,415 23,219 16,276 22,115 19,959 17,846 18,640 18,955 21,138 24,572 28,773 Usage (kL)
Dust Suppression 5,000 5,000 5,000 5,000 5,000 5,000 5,000 5,000 5,000 5,000 5,000 5,000 5,000 Construction Water 10,000 15,000 15,000 15,000 15,000 15,000 20,000 55,000 55,000 65,000 40,000 Total Usage 15,000 20,000 20,000 20,000 20,000 20,000 5,000 5,000 25,000 60,000 60,000 70,000 45,000 Net Water Movement - 1,633- 1,210- 4,050- 8,544 2,089- 4,980 13,406 14,289- 5,275- 40,590- 44,003- 57,437- 36,638 EOM Water Balance (kL) 599,050 597,840 593,790 585,246 587,335 582,355 595,761 610,050 604,776 564,186 520,183 462,746 426,108 EOM Surplus Water - - - -
