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Ridgway Reservoir Micro-Hydro Project Loan Feasibility <br />Page 29 of 42 <br />Ridgwayr Dam Hydropor�ver Froject <br />DESCRIPTIU�ti UF PROPQSEI) PRQJEGT <br />The Tri-Gounty Water C�nsertTancy I3istrirt (Di strict) has propased det elop�ent �f the hydropower <br />p�otent�l of Itid�w•ay I�n near Ricigvway, Calarado �Pmject�- Thi,s neprnt P�o'��ides s lasi:ef sum�ary of <br />H� f�sibilit�� of t�e Prnject, and describes c�nc�tual-level d�eetails t�at c�n be use�d b�,* the Bureau of <br />Reclsmation �Rec4azu�ticm) fa� in�tusion in its Fn<<ir+o�t� �lssessment_ <br />Cisil R'or�€s <br />°The �se�d Praject includes penstocks, a sin�le, metal-fr� po�werhouse, a a_8�iie distribution lix�, <br />�ci a substatian t�at boosts the �rel#a�e froxn 249 ki�ovolts (1�� to 11S-kV so that the Praject caa be <br />in ed with the regional pow� g�id_ Fi�ure 1 s�ows fhese feal�:s_ <br />T�e pm�a�ed �er pla� wcyuld be located between the e�rge�cy spxllway' and river outlets on <br />H�e �a�th side of t�e dam_ 'il� powerhause vir�outd be a�etal structure re�ng a�n a roax�te foundation <br />apg€xraimatel� 60 f�et by 60 fe�#, a�d would co�taixi t�e tu�in+es, �erat�s, a�d balaare of plant <br />Fi�u�e � shovws a g�eral a�rangement of the pLa�t_ It is antic�arted t�at t� plant wo�ld have <br />a reflno�,able rnof � pEmut craue �ess fo� geriod�ic tuc#liue and �ta� maint�e,naz�ce. <br />T�e �lanf wraild occupy �t of a small peai�sula that se�arates the emerg�nc�,P spilt��y s�illing basia <br />from #he rit�er autlet stilting Uasin. Discharges &am the hutriues a��d t�e u�ade ia�to �e em�rge.nc'cY <br />s�limg besaa <br />F - desi�u f�#�+es ca�at be det�in+ed at this t�e du�e to t�e at�ence af �te-sp�cific <br />�eatecfmac.�l inc�igaticxis_ 'Th�se investigati+c�s woutd be c� dt�iu� the neat phase of desi,g�. <br />'T'� g;a�e ha��e sits on pite fa�t�ns, tltiven ta b�edr+�ck ap�nately itD fe�et below the ,grouaci <br />smrFac�_ Foz puu�pases of tiris study, it was assuaued Ehat a co� mrat �tion v6�d be used that is <br />�� feet th�. L�nder tt�is �ssluup�ic�, the magi�m de�th caf ex�ca`tatic� �ouid lbe to ele�atio� 6620 feet <br />abo�e �st � lei�l (MSL), vr about 33 feet below the g�rCx�nd s�£a�e. <br />Tarbises <br />T�e Praj�ci ra�ontd use tv►ro horizanta� Fr�cis turbines ve�ith a c+a�ined rated cap�city of 7 mega�atts <br />� af part�er a�rd pmd�eing an avera�e of 22,000 mega�att-hour� E�[�h) of e�e�' Pe�` Yea�'- It is <br />c�Y Fl��ed �t the units would be u�t-equally siz,ed in order to talae � advantage vf the <br />re�s�ir ctisc�rpes_ The larg�s of f�e t�ro woutd �enerate 4.91kfGL� at s�ted he�d (2�0o feet> a�d peak <br />e�cies�cy {93 p�)_ This turbine would operate �u�ng tLe itn�u sca,�an, ov�er �+o�ws ramg�ng finm <br />10(1 t� 3?Q �bic #eet ger secand (cfs)_ Msxinaun power from f� uailt �ould he 4_9 MW_ T°he smaller <br />tu�b�e ��ld op�rate �reaz round, $nd w ould operate ov�' a flo� range of 40 to l� cfs_ Table 1 <br />s�s lc�y i�e data_ <br />Turbinc ,�tter�atirrs: 'I9�e Project as ciuresatiy pmpos�d w�aiild utilize twsa ha�iaoatal Fran�cis units to <br />mnst ef5iri�entt�• caphu�e � con`�ert the energy in the �vat� to electricit�. As the +d+esign pnocess t�oves <br />for�sr+d., and mo�+e d�asl�d ge��technical dsta are gather�ed a�d det�ileci ��dor qaotes are being solicited, <br />th� Disirict sha�d ccwnsicier use �of an im�ulse t�pe ttubi�e in� af a Fra�css unit_ Ttre Franca.s unit is <br />%e bec�use it is t}�e nyost efficient type of equip�t at t�is rsa� of flow a�d head. An <br />iinp�ulse ucut ��suld not be as effirien#, but has other features that could � ot� pR+oject cc�sts and, <br />p�s, re�c� pQSSibl�e Reclau�atian conc.e�ns abo�t �e discharge into ihe �ency �ilinQ basin. For <br />the rep� a quc�e �as o1�i�ed �i groposed t1�r�e t)ssberg�er �(a specific #ype of impulse <br />tm�ne)_ The ���nd�ed soluti� w�s thre�e units, each r�ed at 2_4M, Hiat would agerate o�rer <br />� ra�,e� of �Oww9s Ueiween 20 cfs an�d b0i) efs_ Efficiency of the Ossber�er �t is siguificaa�tly less than the <br />Ritl�war! Hydr� �easibility Simnnary Pa�e 1 <br />