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• r:-tderyround coal mining eo~rat:ors within ttt~ surf:ice xarpt general at~a <br />include: <br />(i) A ~~ ?'ine <br />,?•-. <br />(2) Eagle !!5 and i9 F1in2S <br />(?) iaiddle Czeek ,~?ine <br />(.1) Trout Creel: Ftl ne <br />Descripticr. o.` the Ex_sr:n:7 Frvironmer.t - Sur:~ac_S•%ar°t <br />:':e `ol_'owing descrioticr. of the baseline ;tudrnlcg~; -~ summ,~rize~ pt: marilu <br />f_em information submitted by the applicant in /nl umr. I_ cf tha Ut-,h Ir.ter- <br />natioral Trapper ~~?ine pernit application. <br />Flow to the Fampa River depends primari'y on mFit water from .*.Y,e w_nter snow- <br />paci: on t1;e high mountain sloes surrouniny the ;ai2ey. ?'he Sow~t ,:ntarmittent <br />and ephemeral drainages produce only a shall tart n° i-he total :Dater yield cf <br />the basin (COiorado S/ater Gcnservatior. 5oer.d, _j69;. Timi::<; of _`lo•.a from the <br />valley demonstrates the irap:;rtance of snoc.anelt runoff to water pie!:1. F_gcre <br />shows a graph of the ,Yeah monthly discharge of fire Tampa 72ic~r at ,~laybell <br />(cr-3inae? area - I,9s"0 squat= niies), From :415 tc iPE~. A;~oct oil p?^ cent <br />of the flow n_c:rs 'n f9ay and June with up to d5 per cent occurr.ny _`ron April <br />to July at selected cay_ny s`_atlens within the va.Iey (Steele, at a1, i979).~ <br />idinimum flocs ganerallq occcr frog Acgust thtoay; Februar•~. Icrns, at al. <br />• (19651 reported that sump=ttime flows _r. streams of t.,e hash. from Ju1u <br />through ctcrer ae ~e_*aily _'rci:ode a lar:r=~ ccrcror.enr or ,~rousd ::•ac?r c:~aroe. <br />Extremes recorded at the !?aybell yao~ng station are a me:rimum flow of 17,900 <br />cfs on ~+;ay 19, 1917 and a minimum of 2.~~ c`s on July s7-19, 1d;9. t~nr,vai <br />variation 'n yield .Tay also be great. Historical annual yield has var_`.~d <br />Isom ;45,J00 acre-feet :.n 1977 co 2,_'?5,000 acre-f^et for the Yampa River <br />l.n iPli. Ae'e'rag^° arrual _ield amoents Co 1,lIF,nOO acre-_`eet. <br />Gischa roe and sus pendsd sediment data cf the Yampa River for wa `er year 1475 <br />a_e given for two sites near the Trapcer Wine in Ficures 5 and 7. The first <br />site (Hayden) is Se1om an irrigation dive.tsion near 3ayder. and .is anprcx:- <br />mately 30 miles upstream of the other site (Craig) whic%t is lust upstream <br />of ti72 confluence wit't Johnson Gulch. A'sionif'car.t amount of t.'te runoff <br />from eerZu snown:elt in April and h'ag was derived f_*om the drai;:ace be rre~en <br />E'aude^ and Craig. Susperc?ed sediment roncen`ratior, decreased sooner ac t=e <br />^pst`eam sits (i'ayden; tna^ at the Cn=_ia sit", which i„dicates a siar._=.scar:t <br />amou.-tc of sediment Load _s added from t.ho drainace reach b,:tmeen these C:n <br />sites. The rase ."uo c~n9i tions be tw~en .1un;.7st and ~~fa rrh are -•e.'y siri Sat <br />.or t`:e two sites. <br /> ,Be [illiams Fork River is a major tributary tc fire Yamca Fire- and enters <br /> <br />J7e Ya.mna c?ownstn=am o_` the Trapper dine. It drains appm:;ima :. 2 <br />elu~;9l cr , <br /> or ten her cart, of `he Yampa 7ail'y and shows marry of the gar„~ chatact=_ris`~cs <br /> as t~:e °ampa r^iver. Pear: f1cw5 voce.- in the mcnti: of 7a,ay, and the n,a~orit~.: of <br /> I:InOff JCCIir' .`rCm : '_3jh <br />ii, tll t0 Jl1n E'. F1 CU re f) is 3 !-3r "sir r0 tfie mean <br />o` <br />• mop tn_u flow of tite - <br />[:'illiars -or}: g. vet rot `.`e per~cd o.` '^Oa - <br />to '427. <br />