Gor don L ake Mine Site s: MVL WB T e c hnic al Pr e se - PowerPoint PPT Presentation

Gor don L ake Mine Site s: MVL WB T e c hnic al Pr e se ntation Pr e par e d for the Mac Ke nzie Valle y L and and Wate r Boar d Se pte mbe r 15, 2016

Purpo se o f Pre se nta tio n 1. Pr e se nt site loc ation and summar y 2. R e vie w de tails of the r e me diation pr ogr am 3. Pr ovide update on the r e me diation pr ogr am 4. Addr e ss c ompone nts of the Pe r mits – Pr e , dur ing, and post r e me diation pr ogr am

Site L o c a tio ns a nd Summa rie s T ry Me Burnt I sla nd Go o dro c k Murra y L a ke Ca mla re n Sto rm Pro pe rty K idne y Po nd T re a c y We st Ba y

Site Summar ie s • Burnt I sla nd • Go ld mining fro m 1930s to 1990s • Ca mla re n • Go ld mining fro m 1930s-1991 • One la rg e ta iling s c o nta inme nt a re a • Go o dro c k • Go ld a nd tung ste n mining fro m 1930s to 1970s • K idne y Po nd • Go ld mining fro m 1944-1995 • Murra y L a ke • Go ld e xplo ra tio n 1930s to 1940s a nd sma ll e xplo ra tio n pro je c ts 1980s to 1990s

Site Summa rie s • Sto rm Pro pe rty • Go ld a nd tung ste n e xplo ra tio n fro m 1940-1975 • T re a c y • Go ld mining fro m 1945-1953 • T ry Me • Go ld e xplo ra tio n to o k pla c e fro m 1938 -1941 with no a dditio na l wo rk until 1989 whe n a drilling pro g ra m wa s c o nduc te d • We st Bay • Go ld o pe n pit mining during 1982-1984 a nd a g a in in 1990 due to a dditio na l re so urc e s o f g o ld in the o pe n pit a re a

Re vie w Re me dia tio n Pro g ra m Ha za rd Ca te g o rie s: • Co -Ming le d I mpa c te d So il – pla c e d in T SCA o r WRSCA • Me ta ls I mpa c te d So il – pla c e d in T SCA o r WRSCA • PHC I mpa c te d So il – L a ndfa rm a nd c o ve r o n T SCA o r WRSCA • Mine Ope ning s – a ddre sse d o n individua l b a sis c o nside ring sa fe ty • Unde rg ro und Wo rking s – a ddre sse d o n individua l b a sis c o nside ring sa fe ty • T re nc he s – a ddre sse d o n individua l b a sis c o nside ring sa fe ty • Ab a ndo ne d I nfra struc ture – de mo lish a nd pla c e d in wa ste fa c ility

Re vie w Re me dia tio n Pro g ra m Ha za rd Ca te g o rie s c o nt: • Ab a ndo ne d Site Building s – de mo lish a nd pla c e d in wa ste fa c ility • T a iling s – pla c e d in T SCA o r WRSCA • No n-Ha za rdo us Wa ste – c o lle c te d a nd pla c e d in wa ste fa c ility • Unfire d E xplo sive s - a sse sse d b y e xplo sive s e xpe rt during re me dia tio n a nd a ddre sse d b a se d o n re c o mme nda tio ns • Ha za rdo us wa ste – c o lle c te d a nd dispo se d o f o ffsite a t lic e nse d fa c ility • Se dime nt – no a c tio n re q uire d a t this time • I mpa c te d Wa te r – disc ha rg e d to surfa c e Portal Seep - 2014

Re vie w Re me dia tio n Pro g ra m Ha za rd Ca te g o rie s c o nt: • Wa ste Ro c k • Hig h risk ha s de mo nstra te d po te ntia l to c a use do wng ra die nt impa c ts a nd is pre se nt a t Ca mla re n, K idne y Po nd, T re a c y a nd We st Ba y with a to ta l vo lume o f 41,214 m 3 • Mo de ra te risk ha s de mo nstra te d minima l po te ntia l to c a use do wng ra die nt impa c ts a nd is pre se nt a t Burnt I sla nd, Go o dro c k, K idne y Po nd, Murra y L a ke , a nd Sto rm Pro pe rty with a to ta l vo lume o f 1,089 m 3 • Hig h risk wa ste ro c k a t Ca mla re n will b e dispo se d o f in the T SCA • Hig h risk wa ste ro c k a t K idne y Po nd a nd T re a c y will b e dispo se d o f in the WRSCA • Ma y pla c e mo de ra te risk wa ste ro c k b e lo w wa te r ta b le a t Go o dro c k, Murra y L a ke , Sto rm Pro pe rty a nd T re a c y de pe nding o n me tho d o f mine o pe ning c lo sure • Mo de ra te risk wa ste ro c k is sub je c t to mo nito ring

Wa te r L ic e nc e T rig g e rs • Ma jo r site s ha ve trig g e rs • T SCA - Ca mla re n • WRSCA – K idne y Po nd • Ca mps – pro po se d a t Ca mla re n a nd K idne y Po nd • L a ndfa rm – pro po se d a t Ca mla re n • Mino r site s c urre ntly la c k trig g e rs due to sc a le a nd type o f pro po se d wo rk • Burnt I sla nd, Go o dro c k, Murra y L a ke , Sto rm Pro pe rty, T re a c y, T ry Me , We st Ba y

Re vie w Re me dia tio n Pro g ra m - Upda te • K idne y Po nd Po rta l Se e p Wa te r Ma na g e me nt Syste m no lo ng e r pro po se d • T o po g ra phy sug g e sts tha t the wa ste ro c k pile s like ly dra in into the we tla nd, c o ntrib uting to the b ulk o f Co C lo a ding s • T he wa te r q ua lity in the Po rta l sho we d lo we r Co C c o nc e ntra tio ns whe n c o mpa re d to sa mple s c ha ra c te rizing wa ste ro c k disc ha rg e • L imite d disc ha rg e fro m po rta l • We st Ba y wa ste ro c k re q uire s no a c tio n • I mpa c ts no t o b se rve d in Go rdo n L a ke o r we tla nd tha t a re no t a ttrib ute d to b a c kg ro und c o nditio ns • Wa te r q ua lity will b e mo nito re d a s pa rt o f Mo nito ring Pla n • De sig n ro b ustne ss • F ina l fo rm o f T SCA a nd WRSCA b e ing re vise d to a c c o mmo da te 1:1000 ye a r sto rm e ve nt

Pe rmit Co mpo ne nts Prio r to c o nstruc tio n (60 da ys o r e a rlie r) • Co ntra c to r will sub mit (a nd I NAC to pro vide to MVL WB): • E ro sio n, Se dime nt a nd Dra ina g e Co ntro l Pla n • Upda te d Spill Co nting e nc y Pla n (if re q uire d) • Upda te d Wa ste Ma na g e me nt Pla n (if re q uire d) • L a ndfa rm lo c a tio n (pro po se d lo c a tio n sub je c t to c ha ng e ) • Ca mp lo c a tio ns (pro po se d lo c a tio ns sub je c t to c ha ng e ) • F ina l e q uipme nt list • A L a nd Use Pe rmit a nd Wa te r L ic e nc e will b e re c e ive d (pe nding a ppro va l)

Pe rmit Co mpo ne nts During re me dia tio n pro g ra m • I nspe c tio ns • Co nstruc t fa c ilitie s • T SCA – prima rily ta iling s pre se nt a t Ca mla re n, a nd a dde d wa ste fro m Burnt Isla nd, Ca mla re n, Go o dro c k, Murra y L a ke , Sto rm Pro pe rty, T ry Me • WRSCA – prima rily wa ste ro c k pre se nt a t K idne y Po nd a nd a dde d wa ste fro m T re a c y, K idne y Po nd a nd We st Ba y • L a ndfa rm – hydro c a rb o n impa c te d so il fro m a ll site s, ide a lly c e ntra lly lo c a te d (inc luding mo nito ring we lls a t la ndfa rm fa c ilitie s) • T ra nspo rt impa c te d ma te ria l b e twe e n site s • T o b e de te rmine d b y c o ntra c to r, like ly b y truc k o n winte r ro a d o r b a rg e • Ba c kfill mine o pe ning s • Mo de ra te risk wa ste ro c k b e lo w wa te r ta b le • I nde pe nde nt third pa rty c o nfirma to ry sa mpling a nd c o nstruc tio n mo nito ring

Pe rmit Co mpo ne nts Po st re me dia tio n pro g ra m • L o ng te rm mo nito ring pla n will b e pre pa re d during re me dia tio n • Pro vide d to MVL WB 6 mo nths prio r to pro je c t c o mple te d • Pe rfo rma nc e mo nito ring o f c o nstruc te d fa c ilitie s • Risk ma na g e d a re a s (c e a se mo nito ring o nc e a ssumptio n o f lo w risk c o nfirme d) • Do wng ra die nt wa te r q ua lity mo nito ring • SNP sta tio ns pro po se d a t: • Ca mla re n (T SCA), K idne y Po nd (WRSCA), disc ha rg e sumps

Wa te r L ic e nc e Spe c ific Co mpo ne nts During re me dia tio n pro g ra m • Wa te r use • Ca mps, winte r ro a d po rta g e c o nstruc tio n, dust suppre ssio n, e q uipme nt de c o nta mina tio n • Disc ha rg e s • Ca mp wa ste wa te r (tre a te d, to so a k-a wa y pits)), e q uipme nt de c o nta mina tio n (tre a te d if re q uire d), mine o pe ning de wa te ring (pre c e de nt fo r so a k-a wa y pits fo r mino r q ua ntitie s), la ndfa rm (tre a te d if re q uire d) • Wa ste fa c ilitie s • T SCA a nd WRSCA: dry c o ve r (g e o me mb ra ne a nd so il la ye rs) syste ms with inte rio r a nd e xte rio r (do wng ra die nt) mo nito rs

Clo sing Co mme nts…. () Stantec