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0 • <br />a < <br />� ,vy <br />i Evaluation. of Pot Tag Reservoir Sites <br />1! 'fie nPper reservoir area. is ensrently hay meadows and has the potential to be exposed <br />during reservoir operabons which 7$6e feet and tberefare watea tempesaba=es sh vld semav� <br />rrh reservoir elevation is apprQy nt stream with large' boulders, <br />;• . suitable for trout. The ta1'1•t+tater area is relatively steep gradie <br />step pool's and cascades. Stream b biiat is more limited m this section of the scream tlian that <br />found in the reservoir area. <br />�g1t,3ra713 eso rces. No specif a surveys of Ike area to be. inundated were identified... <br />However, a total of six archasological sites were ident�-ied whieb �woutd be imps xao. ft <br />Morrison- Creels reservoir. No official determination as to 13re sites'gibility <br />Register has been made Three of the sites are open lift sites which have a "field needs data" <br />Status, which mea»s �u>Saic determination Z official ination caz� �e znade o.An'addif'oDg' <br />is necessary befoxs an the surveyor <br />apeulithic site and two isolated fYnds have "Meld not eligible status, mean?• <br />thought the sites would not be eligible for listing onthe National Register. Of miRl <br />determinations 6%eed to be-made if the site were to be considered further. <br />Of the sites considered zt this stage, Morrison Creek reservoir had ti►e greatest Pada <br />impact On.IMZM and eoloa cal reSaIiicxc. , <br />ri Walton Creek Site <br />, perin� Aspects. US 13S 7.5' quadrangle sheets provide the best avap.able mapPing <br />fir the Walton Creak site since Virtually no other badWouind in%rbaaiion. ex -fats. The dam basin <br />axis at the Walton Creek site would be located at the narro a River. The site would r$s�air a <br />dam approximately (feet loo and 200 feet 91L amp <br />are of moderate abutm derate sla a consisting largely of metamorphic and igneous <br />e� <br />reek with some silty clay. Material ava�abls for darn construction in >� dicta vicm3ty <br />r 4 cons'istn of rock and clay. 'phe mostprobable dam c4 on sx 3llway or possibly s $PM <br />roci�'ilL This site would require an overtopping type <br />t.� coristructeli along th a tight abutment. Side slopes witbin.tLe reservoir area are �noderete t o <br />iLa very iueP. Na geologic hazards were noted at This Isvel of evainatiou. «� <br />drolo .This site is favoiablt in terms of water delivery, being 'upstream. of most <br />potential demand areas..Avcra a anioatal int9iohw would all ivatald be abotrt �,MO �er� -feet <br />e <br />m ximum size xezarvoir that the site topograp y <br />and site characteristics would logically suggest development of ibis capacity. 'tbe sediment <br />' load iu,%ralton Crwk appears to be light. <br />Site Develou ent .os A reservoir of 25,000 of total. volume aft the waltoa Creek to 'Fl].Be <br />would have aavelopraent corm in the =ge of 120 to 3 50 m Iio>1 dollars, clue grsxnarily <br />F1 � . ' M is figure Lepresents a cost of approximstely $6,4.00 per aexe foot of <br />:? large dam size r <br />reservoir active stprage. <br />p� 'p Access to the'4r+'altoa Cheek site is better iban *at f or Morrison C�ee�, the <br />site itseifbeing aniy a few mi'ies off of V.S. Mghway 40. =1T the site is c�,uito remote f rom <br />Craig. The reservoir would have Wrly steep side slogan arld a zafb er uniform "bathtub shape <br />a with few oppoxtun'flu for boat ramps and campgrounds.' he reservoir would provide only <br />1 about 200 acres of s�,ce. area when. fail. About 50,000 21m T 3ts might be expected under <br />1991 condifions. <br />4-15 <br />