PERMFILE54221

• Permit No: C1984062
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 3 ‎(Set 2B)‎ SEDIMENTATION POND DESIGN ENERGY MINE NO 3
• Media Type: D
• Archive: No

arcs arc uocY ne. . I nr deter mining Ilu• delivery cniu in unlcr In obtain scdi-
~icld.
'roeedu« •c were aka p«n~nlyd in Ihr p«•L iuus ca'Iion titr nunlil ving the USLI~.
nntl fur deposition bctwrcn the lirld and a Jclinal drainage channel. 14c called
ualion the Ueposilirnt Mudilird 1151.1[. If Ihic equation is aced to pn•d ict ero-
a drlivery ratio Jil(e«n1 from Ih;ll using the ciinplc 115 LI( aill he necJed.
fn Ihic scclirnt. Jrlivcry ralios art disalssrd :uul factors assigned fnr acing cadt
J. II should be pointed aul Ihal our Jcg«•e of undcrcl;nuling of cedintt•nl
ry ralios is probably Icsc Iltan atry• other area of «•d inu•ulalion.
ing Uclivcry Ratios
As the walersheJ size increases, the length of the ;n•rrage flow path Ihmugh the
)ed oleo ins teases. Since the number of opporlanitics tot drpucilion will
Ily inc«•asc with the length of Iluw path, the size of the walcahcJ is :m intpor-
vanu•ICr affecting the delivery ratio. Olhcr haralllCll'r$ aft CCIIIII! the delivery
arc the degree of ch:umcli~;lliun p«sent in the w;ltershed, size of the eroded
al and vegetation pn•scnt in the Bow path.
r
N'c propose :I nnllliplicalive «lalionship for prt•J ie ling the st•dinlenl delivery
r sad eroded from surface mines. ur
D = I)~ ~ Uy ~ UI~ ~ Up (5.73)
L
17~ is the Paranu•ler which drurihex the arty effect rnt delivery ratio, Dy is
ranle•!er Ibal dreL'r ihoc 16c cl iirl n(crdimrui nappi nip nl vegcla lion nn tlclivt•t )'
I)r~ is the par;unclcr Ihal decclibcs the clfcels of cliamlclizaliun nn dclivcn•
nd I)p is Ihr paruneler Ihal dclinec the clfec is of Je position in Ibe pit and
Il:Itil ¢anl delcolinn Iota lions ul her Ihau the scJilnr nl delrnlinn «'crn•uir on
ry ratio. 11'hcn using the Urpustl intt AluJnicJ USLI ,each ul Ihr ti nos is
ipcl srlil'I m, auJ I)"' is the ninJil ieJ drlicely ratio.
W IivclV It:IIjII Rrlaliunship+
Lkint: the Sian plc ILS LI~.. i1n rxamtdc of the a«•a rlli•e lc on sclhlnenl deliver)
v- shown in higun• 5.73. P: rocinn pn•Ji: (ions uceJ in drvcioping the curves were
mt Ihr xinq,lc l1SLli. (•nnciJrralde scatter is prt•cL•nl in the data: howrvcr, Ihr
11 In•nJ inJic:des a strung alli•cl ul area un delivery laliu. Uifle«necc exist in
~iu~)I'eurves fur dilli•renl arctic. 'I hr« litre. it is decirahle, where pnacihle, to ob-
Seurve specilie for a given area.
Using the Ikpocilion ModilieJ 1151,1 ~..lhe Ik•pnciliun Ivludil icd IIS LI~. prctlicls
dintcnt dcliven•d to a Jcfincd drainage channel. The«f~re, most of the area
s un ccdintenl yield h;rve been n•J need nr slim inaled. Snntc deposition m;n•
in lhr rhanncl. bnl ;unnunls ccnulJ be Jillicull In prod icl. Fur Ihic «•acun, vsc
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DRSIFIO[ SILO 1 SOUSNE YICFS )
I~igurc 5.73. Scdin«nl~l sliver}' r:d iu versus site ul Llralllage a«:1. Up. WIICrC
pocsihlr, silt specific Jala should be used. (Boyce. 1475)
Ubviuusly, equation 15_'•7) «p«•centc the exl« nlc.
Vegetative Trapping I~ Ili•e le, I ly
Using the Simple US LII. l~hr ;nnuunl of sediment trapped between the field
and a stream channel mua be aavunteJ tor. Sunte of this elfecl hoc already been
accoimtcd for in the Ih•livcrc Italia-Arco «hllimtship. \1'hal is nrrdcd is carialions
Irrnn the mean. llnlurtun:ucly~sludics conducted lu dale have simply IlnnpeJ vegela-
lice and oleo n•la liuncll il,c iota Ibe came Parameter.(hu•alrh «•)aliunchip by Ilnlbergt•r
cl al. (I`I76t pn q,uccs Ihal

'r
W
where 1, is Ibe Ic ng.Ih ul the Rocs Palk Ilvough the vegelateJ area in fret. They found
Ibal cqu:d il,li 15, 'sl .liitlu h' ocel plydirlcd dchcrly Ialioc for cundnleliun si«e, Iml
N'Je I:Ir sllpellUr lu other p«•d it lore Incl. <~auliuu should hr cxcrcicrJ w the ucr ul
elLialion I5.~51 since iI does nut aeonl nl lur clops clli•e le. Uhvunlely, al Acre stapes,
Ihr ellrrle ul vercl:Itinn un drlivrly rally arc tedurcd.
Gx pcric ncc is nccdrd by the a«•r when concirlrring both equallons (5.251 and
the ord in:nc nl I~igu« 5,'.4, II the Ilow p:dh is normal ccgrlalion, we w•oulJ sup;rri
usnlg the luvicer value ul I~igu« 5.73 ur equation 15.751 :unl «•I ling the other valor
equal to one. If very drnce vege Ldiun (i.e. dense fescue) is prescnl, we woulJ suggest
Ihal the combined prnducl of 1'igu«• 5.73 and equation 15.75) chrndd be hclwccn the
prnducl of Ihr hce' and the single solar of the lute est of Ihr Iwv. Only in cast of very
dcusc vegetation and highly aggrcgalcd exrylccd soils wotdd we suggest using the
pruJ uel ul equation IS.'_5) and the orJ ina«• of I~igu «• 5.'_3 fnr the combined 1),1 . 1)y,
Using the Urpncilinn \Indificd l1SLli. In the analysis of ccdimcnlatiun using
the Ucposilinn Modil irJ l~Sl I , filtration by segctalinn hoc al«ady bean rancidereJ.
16rn•fon•, uc alggrcl