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 28 of 167. H114/1-M..'<S Nov 26, 1983 14. the pan factor but the hisher concentration of impurities tend to reduce the pan factor. These influences have been assumed to cancel. The area assumed for the process water reservoir of 15 ha is Ulat measured fo~ 60% storage. This was assumed to be appropriate to estimate evaporation over the full year. Leakage has been assessed based on experience with similar work for Jabiluka tailings dams. A leakage of 5 m3/ha/day has been assumed and half of this would be expected to be recovered by cut off measures. This leaves unrecovered losses of 2.5 mJ/ha/day. It ffil.:.,t be recognised that the leakage losses could be larger than those estimated! though the estlmates are considered adequate as the leakage component is a small fraccion of ~he total losses. In production, t)1e mine is ex~ected to produce 2000 tid of dry tailingsrL~~~ the percentage of solids of t!:(! tailing slurry iS~by weiqht (Renison Goldfields :igures reported by \'4LPU {1983). Thi s corresponds to approximately _~ml!year of water leaving the mill in the tailings slurry. IdLPU have suggested a. tailings c.eposited dry density of 1.4 t/m.J which corresponds to 250 Hl/year of wat(''C retained in the tailings. The released water {350 ~n/yeat') will flow tv the decant da.m. Addition<.il los, s from the system of 95 :1..~ __ /Yt:-<...lr have been dssumed Tor mine usage (see Reference p.2) Th~ components of water loss are s~~arised in Table 7. TA.lJLE COV~ONENTS OF ~~~UAL WATER LOSS AREA EVAPORl-.TION (ha) 2020 nun/year (Ml/y) Process Reservoir 15 303 Decant Pond 3 60.6 Wet Tailings 6 121. 2 Nine use Water retained in tailings '" ". 95 HI year 250 141 year NET LE.'L'CAGE (Hl/y) 13.7 2.7 5.5