Territory Stories

Renison Goldfields Consolidated Limited, Pine Creek Project. Groundwater Investigation Stage 2, Establishment of Borefield and Management Studies. Report H114/3-AA.

Details:

Title

Renison Goldfields Consolidated Limited, Pine Creek Project. Groundwater Investigation Stage 2, Establishment of Borefield and Management Studies. Report H114/3-AA.

Creator

Coffey & Partners Pty Ltd

Collection

E-Publications; E-Books; PublicationNT; Report no. 87/1984

Date

1983-11-01

Notes

Date:1983-11

Language

English

Publisher name

Northern Territory Government

Place of publication

Darwin

Series

Report no. 87/1984

File type

application/pdf

Use

Attribution International 4.0 (CC BY 4.0)

Copyright owner

Northern Territory Government

License

https://creativecommons.org/licenses/by/4.0/

Parent handle

https://hdl.handle.net/10070/228435

Citation address

https://hdl.handle.net/10070/674167

Page content

Technical Report WRD84087 Viewed at 14:07:14 on 29/07/2010 Page 85 of 167. ~ I I I I I I I I I I I , I I I I I I I I I H1l4/1-MRS Nov 26, 1983. 51. 9. Assuming the following values : K ~ 0.4 m/day (across str 1 ke) i ~ 0.014 Go ~ 0.01 the dispersion front is calculated to move eastwaYds at a velocity of 0.5 m/day~ depending on the adopted 90rosity~ At this velocity the main dispersion front ",V'ould move a dis~nce of about 200 metres per annum. 8.2~3 Recoverv Circuit Under present planning the AREA 2 process '...rater borefield will be ext...-.nded northwards as sho'i.'Vn in Figure 16 to provide for the total 9rocess make-up requirement. Under this situation it is expected that the cone of depressio~ created by pUffi?ing downstream 0: the tailing-- dis90sal area will eventually capture seepage water as it moves tn the east. This water ".,ould then be pumped back to the process wat.er reservoir and recycled. At the completion of mining activities the plume nf seepage wat.er will flow past the borefield and move to edst. Depending on final rehabilitation measu~es adopted at the tclilings and waste rock d~~ps, infiltr~tion and percolation of w~ter through tailings could result in continual seepage <J.nd rn0vement of wastewater to the east. As this occurs both c1'spr ion and c~lernical interaction are likely to cause progressive dilution. MINE WATER - FLO\, CHART Figure 26 illustrates the mAin elements of the water supply circuits for the mean and in 5 years ury conditions as discussed in Section 2. For the median year demand on the process borefield is nil (on an annual basis) and there is in fact an annual surplus of 147. In a series of years where rainfall is greater than the median case, there would be discharge from the process water reservoir c.iur ing the wet season. Disposal of the ,,;ater . 'IJuld be by spill into Copperfield Creek.