SUPPLEMENTARY ENVIRONMENTAL IMPACT ASSESSMENT (SEIA) STUDY OF UPPER MARSYANGDI-2 HYDROELECTRIC PROJECT (327MW), MANANG AND LAMJUNG, GANDAKI PROVINCE, NEPAL Submitted to Ministry of Forests and Environment (MoFE) Through Investment Board of Nepal (IBN) Submitted By: Prepared By: M/s Himtal Hydropower Company Pvt. Ltd. Nepal Environmental & Scientific Services (P) Ltd. Thapathali, Kathmandu, Nepal. GPO Box 7301, JitjungMarg-26, Thapathali, Kathmandu, Ph: 4247237977-1-4784026 Nepal Fax: + 977 1-4780994 Tel: 977-1-4244989/4241001; Fax: 977-1-4226028 E-mail: [email protected] E-mail: [email protected]; Web: www.ness.com.np May, 2021 SEIA Study of Upper Marsyandgi-2 Hydro-Electric Project (3 x 109 MW) sfo{sf/L ;f/fz+ !=) k[i7e"ld dflyNnf] d:of{ª\bL–@ hnljB't cfof]hgfsf] k|:tfjs lxdtfn xfO{8«f]kfj/ sDkgL k|fO{e]6 lnld6]8 /x]sf] 5 . ;g\ @)!@ sf] :jLs[t jftfj/0fLo k|efj d"NofÍg cg';f/ of] cfof]hgfsf] Ifdtf ^)) d]ufjf6 lyof] . xfnsf] ;DefJotf cWoog / cfof]hgf lgdf{0fsf] lgSof]{naf6 of] cfof]hgf Ifdtf #@& d]ufjf6 dfq sfod ul/Psf] 5 . o; k"/s jftfj/0fLo k|efj d"NofÍg k|ltj]bgdf xfnsf] kl/jlt{t cfsf/, k|sf/ ;+/rgf, Ifdtf, k|efjx? cflbnfO{ k"j{ :jLs[t jftfj/0fLo k|efj d"NofÍg k|ltj]bg;Fu bfFh]/ tof/ ul/Psf] xf] . dflyNnf] d:of{ªbL –@ hnljB't cfof]hgf 5f]6f] ;dosf] nflu kfgL y'gL aGg] cfof]hgf xf] . of] cfof]hgf (Peaking Run of River with diurnal storage) klZrd g]kfnsf] cGgk'0f{ kbdfu{ cGtu{t d:of{ª\bL vf]nfsf] lsgf/fdf l:yt 5 . ^)) d]=jf=af6 #@& d]=jf= df cfof]hgfsf] pTkfbg Ifdtf 36fP tfklg of] cfof]hgf k"j{ :jLs[t rf/ lsNnf aLrdf g} /x]sf] 5 t/ cfof]hgfsf] ;+/rgf / tLgn] rlr{g] hldgsf] If]qkmndf kl/jt{g ePsf] 5 . Dimension @=) cfof]hgfsf] cjl:ylt / kx'Fr If]q M dflyNnf] d:of{ªbL @ hnljB't cfof]hgf 5f]6f] ;dosf] nflu kfgL y'gL aGg] – (Peaking Run of River with diurnal cfof]hgf xf] . o; cfof]hgfsf] x]8js{ u08sL k|b]zsf] dgfË lhNnfsf] gf;f]+ uf=kf j8f g= ! storage) (headwork) tfn ufpFdf / ljB'tu[x ndh'Ë lhNnfsf] d:of{ª\bL uf=kf j8f g= $ :ofªu] ufpFdf cjfl:yo x'g]5 . cfof]hgfsf] rf/ lsNnf @*)@@ )$ @*)@( #% / *$)@! #) *$)@% )# /x]sf] 5 . ’ ”– ’ ” N ’ ”– ’ ” E of] cfof]hgf sf7df08f}af6 s/Lj @!% lsnf]ld6/ klZrddf kb{5 . cfof]hgf :yn;Dd k'Ugsf] nflu k[YjLdfu{df kg]{ 8'd|]af6- h'g sf7df8f}Faf6 !#) ls ld / d'lUngaf6 @% ls ld /x]sf] 5 _$# ls ld a];L;x/;Dd hf]8\g] af6f] / . a];L;x/af6 @& ls ld sRrL df]6/af6f] x'b} :ofªu] ufpF ;Dd -hnljB't u[x_ / ToxfF af6 cfem !% ls ld . df]6/af6f] x'b} l;/fg tfn;Dd -afFw :yn_ k'Ug ;lsg] 5 . #=)= cfof]hgfsf] ljj/0fM ljBdfg dflyNnf] d:of{ªbL @ hnljB't cfof]hgf xf] . – high head Peaking Run of River with diurnal storage o; cfof]hgf !)( d]=jf pTkfbg Ifdtf ePsf] tLgj6f OsfO{df ljeflht 5g\ h;sf] s'n hl8t Ifdtf #@& d]=jf /xg] 5 . jflif{s laqmL of]Uo phf{ !*)^ sf] /xg] 5 . cfof]hgf lgdf{0f cjlwsf] nflu % aif{ nfUg] ck]Iff GWh ul/Psf] 5 . of] ;'Vvf ;dodf b}lgs klxnfsf] !=^^ 306f kfgL ;+rfng ug{ cw{ hnfzoo'Qm cfof]hgf xf] / cfjZos hnfzosf] dfqf ) @% /x]sf] 5 . o; cfof]hgfdf #^ ld6/ . MCM concrete barrage with a spillway of /xg] 5 . ljB'tu[x ;+/rgf d:of{ªbL vf]nfsf] bfofF lsgf/fdf :ofªu] ufpF glhs three radial gated openings /x]sf] 5 . tflnsf g+=!: cfof]hgfsf] t'ngfTds ljj/0f ljz]iftf -#@& d]=jf=_ k"/s jf=k|=d" cWoog -^)) d]=jf=_ O{=cfO{=P @)!@ @)@) != ;fwf/0f cfof]hgfsf] gfd dflyNnf] d:of{ËbL @ xfO8«f] O{n]lS6«s k|f]h]S6 - – gbL d:of{ËbL vf]nf cfof]hgfsf] k|sf/ cw{ hnfzoo'Qm cjl:ylt k|b]z u08sL lhNnf dgfË / ndh'Ë cfof]hgfsf] rf/ lsNnf Proponent: Himtal Hydro Power Company Pvt. Ltd. Consultant: Nepal Environmental & Scientific Services [NESS] Private Limited i SEIA Study of Upper Marsyandgi-2 Hydro-Electric Project (3 x 109 MW) cIffz+ ) ) ) @* @@’)$” pm b]lv @* @(’#%” pm @* @@’)$” pm b]lv ) @* #)’))” pm b]zfGt/ ) ) *$ @!’#)” k" b]lv *$ @%’)#” k" glhsdf /x]sf] dfgjj:tL a];Lzx/, ndh'Ë 8'd|] a];Lzx/ ;8s v08, k[YjL /fhdfu{ kx'Fr af6f] - @= ;+:yf k|j4{s QYEC International Co., Ltd. Tractebel Engineering S.A. #= hn lj1fg÷k|jfx hnfwf/ If]q @@^* !!)$ ls=dL@ @@&^ !!)^ ls=dL@ (total/snow) / / l8hfOg jxfa %( ^ !!# . m3/s (Q40) m3/s ;/b/ jflif{s k|jfx ($ # . m3/s jflif{s lyu|fg b/ @(#( @%)) t/km2 t/km2 $= e"–ue{ If]lqo e" ue{ – From North to South, STDS, MCT & MBT d'Vo r§fgsf] k|sf/ gneiss %= ;+/rgfx? afFw (dam) afFwsf] k|sf/ Non-overflow concrete gravity dam Rock fill dam with gated spillway afFwsf] nDafO{ !!^ dL= !$% dL= k"0f{ Ifdtf ljGb" !&@) !&)@ masl masl afFwsf] prfO{ #& dL= #@ dL= j9L kfgL aUg] af6f] (spillway) pRrtd ljGb" !&@@ !&)% masl masl j9L kfgL aUg] af6f]sf] cfsf/ * dL= x ( dL= ( dL= x !@=% dL= ;+Vof @ # d'xfgsf] ;+/rgfx? (Intake) k|sf/ Submersible hole afFw;Fu}sf] 5]psf] d'xfgsf] ;+Vof ! # cfsf/ ^ dL= x @& dL= %=% dL= x !$ dL= O{Ge6{ ljGb" !^(% masl !^*@ masl !&@@ !^&& Sill Level masl masl lyu|fg ;+/rgf k|sf/ e"ldut ;+Vof @ cfsf/ D- cfsf/sf] lyu|fgsf] cfsf/ )=!% mm ;'?Ë k|sf/ 3f]8f h'Qf cfsf/df pTvgg\ 3f]8f h'Qf cfsf/df pTvgg\ cfGtl/s Jof; #=(* $=** dL= %=#$ %=^( dL= ^=& dL= (W x H) – x – nDafO{ (=@ ls dL= !@.)& ls dL= lgdf{0f cl86 ;+Vof ^ ;+Vof $ ;h{ zfˆ6 Proponent: Himtal Hydro Power Company Pvt. Ltd. Consultant: Nepal Environmental & Scientific Services [NESS] Private Limited ii SEIA Study of Upper Marsyandgi-2 Hydro-Electric Project (3 x 109 MW) k|sf/ Two-compartment e"ldut cfl/lkm; Jof; !! dL= prfO{ &! dL= (& dL= cl86sf] ;+Vof @ k]g:6s ljeflht x'g' cl3sf] nDafO{ *#) dL= (*(.$ dL= cfGtl/s Jof; #=* dL= ^=&) dL= (m) No.of adit ! @ k|sf/ l:6n ljB't u[x k|sf/ e"ldut cfsf/ ^# @$ $$ (^ dL= !@$ @@ @@=%) dL= (L x W x H) x X . x x k|lt OsfO{ hl8t Ifdtf !)( d]=jf !%) d]=jf . OsfO{ # $ 6]n/]z k|sf/ ;'?Ë Jof; & dL= %=% dL= cfsf/ ^=& % dL= & & dL= (B x H),D-shaped X X nDafO{ ^*$ dL= ^#(.)@ dL= n]jn !)^*=@ masl !)^*=%) masl ^= 6/jfO{g k|sf/ k]N6g ;+Vof # $ x]8 ^!%=* dL= ^)!=&% dL= k|lt OsfO{ k|jfx !(=*% @*=@% m3/s m3/s 6/jfO{gsf] n]jn !)&)=$) masl !)&@ masl bIftf (! Ü ().% Ü &= h]g]/]6/ k|sf/ Vertical Shaft, synchronous, suspended Ifdtf !)( d]=jf= !%) d]=jf= kfj/ ˆofS6/ )=*% )=( ef]N6]h !#.* s]=le cfa[lt (Hz) %) Hz O{sfO # $ pT;fx k|0ffnL l:y/ k|sf/ l:k8 ### ## . rpm *= 6«f;km/d/ k|sf/ OFWF Oil-immersed # ! Number of phase O{sfO{ ;+Vof !) !# ( 1 spare) ( 1 spare) ef]N6]h cg'kfn @@)÷!#=* -s]=le_ $))÷!#=* -s]=le_ cfa[lt %) (Hz) Hz 6«f;km/d/ bIftf ((Ü (*Ü !)= k|zf/0f nfOg ef]N6]h :t/ @@) s]=le $)) s]=le ;'? cGTo g]kfn :ofªu] ef/t ~ Switchyard of UM2HEP ~ ~ Proponent: Himtal Hydro Power Company Pvt. Ltd. Consultant: Nepal Environmental & Scientific Services [NESS] Private Limited iii SEIA Study of Upper Marsyandgi-2 Hydro-Electric Project (3 x 109 MW) ljB't k|lws/0fsf] k|:tfljt v'bL ;a :6]zg !!= zlQm / phf{ Hl8t Ifdtf #@& d]=jf $)) d]=jf Gross head ^$(=^ dL= ^#) dL= s"n jflif{s phf{ !*)%=^! @@*@ GWh GWh ;'Vvf dlxgfsf] phf{ %^@=** GWh $*& GWh jvf{ dlxgfsf] phf{ !@$@=&# GWh !)*# GWh !@= hldgsf] cfjZostf ;/sf/L #&.$@ x] %&.&@ x] lghL @*=(%* x] @*.)* x] c:yfoL #%.&% x] @!.@& x] :yfoL @(.&% x] ^%.$@ x] cfof]hgfn] k|efljt kl/jf/ -3/w"/L_ !$@ !^# cfof]hgfn] k|efljt hg;+Vof &%( ($$ !# h}ljs jftfj/0f cfof]hgfsf] nflu sfl6g] ?vsf] ;+Vof @#^! #@^& jgIf]qsf] hldg cfjZostf #&.@^ x] $(.@$ x] !#= ljlQo ;'rs s_ s"n nfut Aofh afx]s -cd]l/sg 646 millions 8n/df_ - Debt / capital ration 80:20 - Project internal rate of Return 11.14 % - IRR on capital 15.2 % - Cost per kWh (NPR @ 110) 40 NPR/kWh - Cost per kW (NPR @ 110) 221,713 NPR/kW - $=) t'ngfTds ljBdfg jftfj/0fLo cjl:yltM ef}lts jftfj/0f g]kfnsf] If]qLo ef}uf]lns ;+/rgfsf] b[li6sf]0fjf6 cfof]hgf If]qx? kxf8L If]q x'b} pRr kfxf8L If]q ;Dd km}lnPsf] 5 . cfof]hgf If]qx?sf] prfO{df lgs} ljljwtf 5 h;sf] prfO{ !%)) ld6/ b]lv ^))) ld6/ ;Dd /x]sf] 5 . hldg sRrf / lg/Gt/ ?kn] km]/jbn e}/xg] vfnsf] 5 . cfof]hgf If]qsf] df};d pk pi0f b]lv ;dzLtf]i0f leq kb{5 . cfof]hgf If]q j/k/sf] jflif{s ;jf{lws tfkqmd qmdz @% l8u|L /x]sf] 5 . cfof]hgf If]qsf] jftfj/0f lr;f] 5 / cf};t dfl;s ;fk]lIft cfb|tf && b]lv !)) k|ltzt /x]sf] 5 . cf};t dfl;s ;jf{lws jfo"ult * * lsdL . k|lt 306f /x]sf] 5 . cfof]hgf :ynsf] cf};t jflif{s jiff{ @%))–#))) ld=ld sf] ljrdf /x]sf] 5 / *) k|ltzt jiff{ dg;'gsf] dlxgfdf x'g] ub{5 . d:of{ªbL gbL cfof]hgf :ynsf] d"Vo gbL k|0ffnL xf] h'g rflx ;Kt u08sL gbL k|0ffnLsf] Pp6f ;xfos gbL xf] . of] gbLsf] d"Vo ;|f]t lxdfnsf] lxpm tyf dg;'gL jiff{ xf] . of] gbL jif{e/L juL/xg] gbL xf] / jxfjsf] lgsfzsf] k|s[lt rflx d"Vo?kdf 8]g8«Ll6s lgsfz k|s[ltsf] 5 .