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Ridgway Reservoir Micro-Hydro Project Loan Feasibility <br />Page 31 of 42 <br />�'ol� �- � P���Y desigp, th� District wouid c€mduc# d�etailed hydraulic shidies to ensure <br />that discharges from the proposed Project wouid not adversely affect tl�e eacistiag spillway outlet works or <br />#he o�erall hydraulic perfolmance of the stilling basin� <br />Transmission <br />It is sc�ti�rip�t€d that the turbixie-geq►erarars will generate ele�chicii�,� at �4,160 �m1ts. An an site trsnsfa�er <br />asouM �e tl�e �ro�tage to 24_9 kV and tr�nsuut the poa�*er io aa eacisting ?4_� kV lise owned by San <br />Migue! po�er Associatian {SMPA) that is eutreufly used to pmtlde po�►�er to the Ltishict's operati�s <br />bual�iag and to siate park facilities below #�e dani Pt�wer fin�m 1fi�e Pc aject ��d tre distributed by <br />SMFA to a 11 S-kV transmission line abouk �_8 miles north of tt�e P�rjert_ <br />Th� i�e�cti� �*oul+d be ma�e in ac�ordar��ce with curre�at SMFA �nd Tn-State a�equunements and <br />specaficatia�ns_ It is anticipated �1 durisig the ne� se^4�eral �ths, Tri-Sts#e will ca�du�ct a g�erata� <br />anter�a�onec3i� and tran.sani.ssioa deliverabiliiy sh�? to inuestigate hovr the addition af the Ridga'aY <br />P�oje�ct �rould im�sct the rnr�rall regic�flat transmissia� �ci� R�sults of this slbu+dp would provide the final <br />d�etaiis fmr tl� in�ne�i+Qn design and rela#ed e4�t re�qu�r�ts- <br />Ti�e 1 i 5-kV line is currently owne� and operated by S14RPA; h�e��er, plans ar+e beia,� fa�x�lated ta <br />hansfer oow�ig to Tri-S#ate Geaeration and Trausmissia� (Tn-Sfst�e) d�uing fhe r�ext two years_ This <br />3ine nms pa�allel to [fS Hig�wsy 550. The sobstation �ould be locateci a� i�e so�rti�west coiner of the <br />iu of tl� dam's acc�ss ro�d and [�S Hig�wa�� 550_ Hns � •, a�tia� was located at that <br />�oe�€, tapping #be transmission liue and st�epping d�wn �e pa�°er to s�-e Reclamation's po�ver nee�ds <br />� c�a�shvcticxi. Ti�e statioa vv�as remov�d during � paslt ben �+eais- <br />T�at acx�e,xs mad also seiv�es RidgvvaX State Pazk_ To a�,oid any ad��se �aisual �e�+cts on park visitaas, the <br />ne� �ouki �itize low�file design techniques- <br />Transmissioe �+literu�ti; e: Th�e c�rent nra�endati�xi for Pc+oj�ect pov�*er atd e�y to <br />the �g gid, described above, may be�odified pen�g 1he � of additia�al �es hy 3MPA <br />os t13e ca�aciRY- SPI+IPA naw operates the exisfing 24_9-k�i disin�6ariiau line tl�ati v►-a�utd tae used by #he <br />F�o�ed b tra�aut power to Tn-S't�te's 115-kV li�_ Ttie SMPA lime t�Emt�e°s throug�t aa amderground <br />ro�ii about 5 ntil�es snuulfieast of the Project to �e Dallas Cn�ek Sobstatioq w�+e 'SLV�A interconnects <br />� Tr%State_ It rnay i�e gas.sible for Project poc►*er to fallo� ffii.s p�th t+a � D�allas Cr�eek Substation <br />iast+c�d ofin�ting wsth Tri-St�te at Highvr�� SSO. Tins wonid elim�atp the cost of a n�v <br />s�bstation, which c�td �ve the Project as much as Sl nulli� a� m�e_ <br />P�icx to detemuning if tbis is a�riatrle ��, SA�SPA w�ill have to �et�e if the line can adequately <br />ha�udle the inaximum power expected fra�n t�e �mit (�ga+oatianat�y� 7_�Midf,�. If naC, new canductaz <br />u�oa�d b�e u�ede+d, Prom�tmg a cost stuciy ta det�m�ne if �e cost �mf tl�e nes�, a�tcn Wro�ld be affset by <br />the ad�itia�nal energy, or if tl�e unit shcx� be resized to a smailer �_ This e�aluatio� shoiild be <br />made . _ ety after SMPA provides the results of its anal�sis ta the Uist�ict, <br />Plagt ()peratioa <br />'I'�e p�vposed Pmj�ect v►*ould operate usin� anly flows fi+ann �e m�er �#ie� _ I� is anticipated that <br />�dis�ch�rges �id c�ntim� as tlyey ha�� been made i�istaui�c� —� is, reteases fos water �upply and <br />rtrigaticxi aould begin in late Ma�+ch a�d g;radually i�xresse throu�h Msy> hold sn�ewhat canstant during <br />Juo�e anci .)uly, tl� rececie dnring August thro�ugh ()ctober_ In the �tths c�f'No��, Dece.ml�er, <br />Janua�y azxi Febru�y, +auly manu�m #%tivs air rele.�.sed, y ar� between 58 and 71 cfs. <br />At tlae beginaiug of e�ch urigati� season, water v�=ould be diiscl�ed i�rougb tLe �1 river out�et to <br />e�+ci.se ihe �eJCisting slicie g�tes an+d ma� cert�n all naama! sys�e�s are in �aaii�g amder. Then, the gate <br />v�al� to ti�e large tt�rbine urould be ope.�ed azid the slide gates closed bn fa� tbe;vata thou�p the tut3zine <br />and gme�t� pow er. The system w�uld confiu►ue to operate ist tlr�t mode untii tbe late fall, or until an <br />�►ear�ec3ed ont��e occur.ss. <br />Rid�ray Flydro Feasibility Sammary Pa�e 3 <br />