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 62 of 167. I I I I I I I I I I I I I I ~ I i I I I 1l114/l-MRS Nov 26, 1983 37_ ----------- ---------------------1 (4 I (5 ) Low pr'oduction r<ltcs are !:"equircd to maintain (. schargc due to the effect of aql:.ifer bou!1dary condition on ra t+:> 0 [ drawdown, and limi ted ?ump submergence. The aquifer is more amenable to pu..."7tping at low r es for extended periods r rather than short pe:!.iods (.l"l I1H:-:h discharge. These factors suggest that, in p~actice, it is prcferabl.e to .]110\<r' t11C boreficlds to operate at low net discharge rotc's for extended. periods I storing water i:1 the p!."ocess rCSCrVOl.r - rather ~har'., deplete the process rese~voir storage, and then attempt to provide the .. ~ocess wate= deficit from qroundwatcr by heavy pum?':'ng. Prom.; ,"",:tc"r conscrvat.io:l viewpoint this approach is 1 ne f f H .. : le:lt bcc<1:uSC a qrcatc~ propo!:"tion of 'dater pu:nped lS lost through cVl!poration end lcak<.1qe. HOlrleVr, f1"om a prC1ct~c<.ll viewpoint low discharge rates spread throughout the ':'t..'.1 r arc more mJn,J,c;eablc, dnd less cupital i:1 ::ensi "ve. It l~ r,_'com.-nc:1ded thdt when water manaqcmc:lt ?olic.:i..cs a!:"e 1 nrmu l d tl.;d r t.,; r:-<.a- t~ ;should be m2de to main tain cor:l!Jincd 1,-; i thdr,lW.1t t~()m C.<roundwdtc't" .1''';' le.;:;:-; t:Vl.rl 2(1 l/s(;c. 'nt.d~ I 1!I ..... r',',~!-;iHq ~'nH.;I.!:S.:-.; rl!~;L:.t'"vuir ..'-;lU~.ltK~. This ra.i!'! Cnroful ul~r~~ion of the potable ~orcfield (Area 3) will also he ~~;~ulrcd to ensure arsc~ic concentrations arc maintained lJe>]ot,.; :It) mQ/1. I. MINE DEWATERiNG 7 _ ! The p:r0:-:imit..y of the' !'roposed 0t'C:r-:. c~t Lo the exist..inq ?inc C'rc{'k t(lWn ~)()rC'ric'ld ~uiscs Cl. nlli-nbe:- o[ :';.iSUCS ':'n r-cldt.i..on tu t h~:- eff(,,:t nf mine:- dC\oJ.:lterinq on the safety 0: the town supply. Durtnc; ll.uQust 2983 fic'ld studi"s were conducted with a view t('") assC'sSl:1q both mine dcwat{~ring rec;uircment.=:; and its likely .lntlucncc on the town borcficld. These studies ':'ncludcd i 1) a review of the geological and structural aspects t!\(' ,~rc<1, [rom rJ. hyd::.:-oqcologicnl viewpoint (2) measurcmcat of water 1 evels in c.:xisting holes and r..;hd f t..s .in t..he m..'.nc ,J.rca of ( 3 ) 'test ~1umpiny of a.n existing bore ;:N20703, located c-:d.l<..1cent to the Stuart Highi,oia.y, bctHcen the minesite .. !I1d the town Dorcficld " I 'a--J