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Home My WebLink AboutFalse Pass Hydroelectric Potential Reconnaissance Report Sep 2015aLiving Systems DesignFalse Pass Hydro Recon: 20150910 False Pass Hydroelectric Potential 2015 Reconnaissance Report Prepared for the City of False Pass & The Aleutian Pribilof Islands Community Development Association (APICDA) by: Bob Christensen of Living Systems Design 20150910 Cover 2. Newly installed stream gage at Unga Man Creek bridge Cover 1. Unga Man Creek seen from north valley Wall iLiving Systems DesignFalse Pass Hydro Recon: 20150910 List of Figures .......................................................................................................ii Background ..........................................................................................................1 Introduction ......................................................................................................................................................1 False Pass, Alaska .............................................................................................................................................1 Current Electrical Generation ......................................................................................................................1 Previous Reports .............................................................................................................................................2 Field Reconnaissance Site Selection .........................................................................................................2 Waterfall Creek ....................................................................................................3 Location & Land Status..................................................................................................................................3 Geology ..............................................................................................................................................................3 Hydrology ..........................................................................................................................................................3 Fish & Wildlife ...................................................................................................................................................3 Waterfall Creek Summary .............................................................................................................................4 Unga Man Creek...................................................................................................4 Location & Land Status..................................................................................................................................4 Geology ..............................................................................................................................................................4 Hydrology ..........................................................................................................................................................4 Fish & Wildlife ...................................................................................................................................................5 Unga Man Creek Summary ..........................................................................................................................6 Preliminary Design ..............................................................................................6 Overview ............................................................................................................................................................6 Access ..................................................................................................................................................................6 Intake Site and Penstock ...............................................................................................................................7 Powerhouse Site ..............................................................................................................................................7 Transmission .....................................................................................................................................................7 Cost Estimate ....................................................................................................................................................8 Economic Analysis ..........................................................................................................................................8 Conclusion ............................................................................................................8 Summary ............................................................................................................................................................8 Recommendations .........................................................................................................................................8 TABLE OF CONTENTS iiLiving Systems DesignFalse Pass Hydro Recon: 20150910 Cover 1. Unga Man Creek seen from north valley Wall ......................................................................a Cover 2. Newly installed stream gage at Unga Man Creek bridge .................................................a Figure 1. The community of False Pass Global Location Map ..........................................................1 Figure 2. Google Earth view of the False Pass Village .........................................................................1 Figure 3. General land status near False Pass, AK. ................................................................................2 Figure 4. False Pass area geology. ..............................................................................................................3 Figure 5. Waterfall Creek seen from 255’ .................................................................................................3 Figure 6. Small cascade and pool in Waterfall Creek ..........................................................................3 Figure 7. View of Unga Man Creek from 204’ .........................................................................................4 Figure 8. View of Unga Man Creek relationship to APICDA plant and town ...............................4 Figure 9. Stream gage installed near bridge over Unga Man Creek ..............................................5 Figure 10. Stream gage installation locations. .......................................................................................5 Figure 11. Minnow trapping just downstream of the bridge ...........................................................5 Figure 12. Panorama of Unga Man Creek ...............................................................................................6 Figure 13. Preliminary design ......................................................................................................................7 Figure 14. Cost estimate table from Polar Consult ...............................................................................8 Figure 15. Preliminary Estimated Performance table from the Polar Consult ............................8 LIST OF FIGURES Page 1Living Systems DesignFalse Pass Hydro Recon: 20150910 BACKGROUND INTRODUCTION Living Systems Design was contracted by the City of False Pass and The Aleutian Pribilof Islands Community Development Association (APICDA) to install stream gages and develop a reconnais- VDQFHUHSRUWIRUK\GURSRZHURSWLRQVQHDU)DOVH3DVV$ODVND$¿HOGWULSWKDWLQFOXGHG&LW\DQG APICDA staff was conducted August 24-28 to survey two potential hydro-power sites and install stream gages in the locations that appeared most feasible for Hydro-power development. This UHSRUWVXPPDUL]HVLQIRUPDWLRQJDWKHUHGGXULQJWKLV¿HOGWULSDORQJZLWKDGGLWLRQDOUHVHDUFKFRQ- ducted for baseline reconnaissance. FALSE PASS, ALASKA The community of False Pass is located at the east- HUQHGJHRIWKH$OHXWLDQLVODQGFKDLQĻļ1 Ļļ:MXVWDFURVV,VDQRWVNL6WUDLWIURP the Alaskan Peninsula. It is an isolated coastal village that is only accessible by boat and plane (primarily through Cold Bay). The landscape surrounding the community is mountainous and spectacular in its beauty with WKH%HULQJ6HDWRWKH1RUWKDQGWKH*XOIRI$ODVND to the South. The climate is sub-polar maritime with cool summers and relatively mild winters. $QQXDOSUHFLSLWDWLRQDYHUDJHVDURXQGLQFKHV ZLWKIHHWRIVQRZLQWKHZLQWHU:LQGDQGIRJ are common. Sea ice has been known to extend into the area in colder winters. 7KHUHDUHDSSUR[LPDWHO\\HDUURXQGUHVLGHQWVZKROLYHLQ)DOVH3DVV0RVWUHVLGHQWVSDUWLFLSDWH LQWKHFRPPHUFLDODQGVXEVLVWHQFH¿VKLQJHFRQRPLHVWRVRPHGHJUHH7KHVHIRONVDUHMRLQHGLQ WKHVXPPHUPRQWKVE\DSSUR[LPDWHO\SDUWWLPHUHVLGHQWVZKRDUHHPSOR\HGDWWKH$3,&'$ ¿VKSURFHVVLQJSODQW2WKHUHPSOR\PHQWRSSRUWXQLWLHVLQFOXGHORFDOJRYHUQPHQWWKHVFKRRODQGD variety of services. CURRENT ELECTRICAL GENERATION Electricity is currently provided by diesel genera- WRUVN:N:DQGN:XQLWVDYDLODEOH depending on load). The village load averages DURXQGN:%HULQJ6HD¿VKSURFHVVLQJSODQW produces their own power through diesel gen- HUDWLRQDVZHOODQGWKHLUORDGVDYHUDJHN: Energy costs in the village are relatively high, DYHUDJLQJ FHQWV SHU N:K RYHU WKH SDVW years. This extremely high rate is typical of ru- ral Alaskan communities whose primary source of electricity is diesel generation. The City has opted to ease the impact of high electric rates on its residents by providing an annual subsidy of DSSUR[LPDWHO\GROODUVWRUHGXFHWKHFRVWRIGLHVHOXVHGE\WKHSRZHUSODQW7KLVVXEVLG\ UHGXFHVUDWHVWRDURXQGFHQWVSHUN:KEXWOLPLWVWKHFRPPXQLWLHVDELOLW\WRLQYHVWWKHVHIXQGV LQEHQH¿FLDOFDSLWDOLPSURYHPHQWVDQGVRFLDOVHUYLFHV3RZHU&RVW(TXDOL]DWLRQ3&(VXEVLGL]HVDQ DGGLWLRQDOFHQWVSHUN:KIRUD¿QDOFRVWWRUHVLGHQWVRIDSSUR[LPDWHO\FHQWVSHUN:K Figure 1. The community of False Pass is located on Unimak island, the very first in the Aleutian chain. Figure 2. Google Earth view of the False Pass Village. Airport Village Harbor Fish Plant Roundtop Mt. Unga Man Valley Ferry Dock False Pass Page 2Living Systems DesignFalse Pass Hydro Recon: 20150910 PREVIOUS REPORTS The community of False Pass has been actively seeking alternative energy solutions to provide greater energy security to the community and reduce the costs of energy to its residents and businesses. Hydropower has been noted in most of the reports as potentially feasible. Both wind and tidal have also been looked at and have provided mixed results in terms of feasibility thus far. Four reports were reviewed as part of this reconnaissance effort: • A report was written in 1982 that described hydroelectric generation opportunities near False Pass as not economically feasible. This is not surprising given that the cost of diesel at that WLPHZDVDOLWWOHRYHURQHGROODUSHUJDOORQ5HFRQQDLVVDQFH6WXG\RI(QHUJ\5HTXLUHPHQWV and Alternatives, 1982) •$PRUHLQGHSWKUHSRUWIURP+HUHLQDIWHU³7KH%DNHUUHSRUW´ORRNHGDWDQXPEHURI communities in the area and summarized options for wind, tidal and hydro in False Pass. 5HFRPPHQGDWLRQVIURPWKLVUHSRUWZHUHWRSULRULWL]HZLQGDQGK\GUR¿UVWEHFDXVHWKHVH technologies are more mature and straight forward in terms of operation and maintenance. )RUK\GURWZRFUHHNVZHUHORRNHGDW8QJD0DQ&UHHNDQG:DWHUIDOO &UHHN %RWK VLWHV were noted by the authors as worth further investigation with an emphasis on establishing DQ DQQXDO UHFRUG RI ÀRZ WR GHWHUPLQH HFRQRPLF IHDVLELOLW\ 5HQHZDEOH (QHUJ\ 5HVRXUFH $VVHVVPHQWIRUWKH&RPPXQLWLHVRI&ROG%D\)DOVH3DVVDQG1HOVRQ/DJRRQ •$PHPRWR$($GDWHG)HEUXDU\ZDVUHYLHZHGWKDWORRNHGDWWZRGHVLJQRSWLRQVLQWKH 8QJD0DQ&UHHNZDWHUVKHG7KHDXWKRUXVHGJDJLQJGDWDIURP5XVVHO&UHHNLQQHDUE\&ROG %D\WRHVWLPDWHHQHUJ\DYDLODELOLW\IRUWZR8QJD0DQ&UHHNRSWLRQVDWFDSDEOHRISURYLGLQJ N:,WZDVUHFRPPHQGHGWRGHYHORSDÀRZUHFRUGDQGDVVHVVDTXDWLFKDELWDWIRUWKLV V\VWHPDVWKHQH[WORJLFDOVWHSLQUHFRQQDLVVDQFH)DOVH3DVV+\GUR5HYLHZ)HEUXDU\ •$QLQLWLDOVWXG\RIZLQGHQHUJ\ZDVUHSRUWHGRQLQ-XO\RI 7KLV UHSRUW FRQ¿UPHG observations in previous reconnaissance work on wind power for False Pass and concluded WKDWWKHZLQGUHVRXUFHLVGLI¿FXOWWRH[SORLW EHFDXVHRIORFDOWXUEXOHQFH)DOVH3DVV:LQG (QHUJ\)HDVLELOLW\5HSRUW FIELD RECONNAISSANCE SITE SELECTION 7KHUHSRUWVQRWHGDERYHLGHQWL¿HGDQXPEHURIOR- cations for Hydro-power potential near False Pass. Two of the sites mentioned are located within the $OHXWLDQV3HQLQVXOD1DWLRQDO:LOGOLIH5HIXJH%DVHG on desk mapping exercises, these sites did not ap- SHDUWRRIIHUXQLTXHSRZHUSRWHQWLDODQGZHUHFRQ- sidered lower priority options because of the dif- ¿FXOW\H[SHFWHGLQREWDLQLQJSHUPLWVQHFHVVDU\IRU construction and operation. Two of the sites noted in previous reports exist on False Pass Village Corporation land (Isanotski Cor- SRUDWLRQ:DWHUIDOO&UHHNDQG8QJD0DQ&UHHN The Isanotski Corporation has expressed interest in developing power production resources in the SDVW1HLWKHURIWKHVHVWUHDPVDUHFXUUHQWO\OLVWHG DVDQDGURPRXVLQWKH$')*$QDGURPRXV:DWHUV &DWDORJ$:& *LYHQWKHVHEDVHOLQHFRQGLWLRQVZHFKRVHWRIRFXV RXUUHFRQQDLVVDQFH¿HOGVXUYH\VRQ:DWHUIDOODQG 8QJD0DQ&UHHNVFigure 3. General land status near False Pass, AK. Page 3Living Systems DesignFalse Pass Hydro Recon: 20150910 WATERFALL CREEK LOCATION & LAND STATUS :DWHUIDOO &UHHN FDVFDGHV WR VDOWZDWHU MXVW miles south of the False Pass airport. The land is owned by the Isanotski Corporation. The lower sections of the creek are easily accessible via a short walk down the beach (at low tide) from the end of the False Pass airport. GEOLOGY Like much of the area surrounding False Pass, :DWHUIDOO&UHHNEDVLQLVPDSSHGDV4YDQG4WY 4XDWHUQDU\9ROFDQLFVVHH¿JXUH8QOLNHPRVW QHDUE\EDVLQVWKH:DWHUIDOO&UHHNEDVLQDSSHDUV to be primarily bedrock in composition. Small patches of gravel were noted in a few pool tails in the mainly bedrock control channel type. HYDROLOGY :DWHUIDOO&UHHNKDVDEDVLQDUHDRIDSSUR[LPDWH- O\VTXDUHPLOHVWKDWGUDZVIURPDSHDNHO- HYDWLRQRIIHHW$¿HOGLQYHVWLJDWLRQRI:D- terfall Creek conducted in support of the Baker report used the bucket method to record a dis- FKDUJHLQ-DQXDU\RIFIV2XU¿HOGFUHZ DOVRXVHGWKHEXFNHWPHWKRGDQGUHFRUGHGDÀRZ RIDSSUR[LPDWHO\FIVRQ%DVHGRQ the complete lack of snow pack available to pro- YLGHUXQRIIGXULQJRXU¿HOGLQYHVWLJDWLRQLWDS- SHDUVOLNHO\WKDW:DWHUIDOO&UHHNLVDWOHDVWSDU- tially spring-fed. FISH & WILDLIFE :DWHUIDOO&UHHNLVQRWPDSSHGDVDQDQDGURPRXV VWUHDPLQWKH$:&2XUVLWHVXUYH\FRQ¿UPHGD EDUULHUWR¿VKSDVVDJHWKHIDOOVLVDFHUWDLQW\DW the intertidal zone. It is possible that the stream FRQWDLQVUHVLGHQW¿VKEXWZHGLGQRWWUDSWKH VWUHDPWRPDNHDGHWHUPLQDWLRQ2XUIRRWVXU- veys found spawning substrate and pool habitat IRUSRWHQWLDOUHVLGHQW¿VKWREHH[WUHPHO\OLPLWHG 7KHDUHDVXUURXQGLQJ:DWHUIDOO&UHHNLVFRYHUHG by Salmonberry thickets and alder shrubland patches. A variety of birds and mammals like- ly use the area as foraging and cover habitat. Although impacts from construction and plant operation would be associated with developing Hydro-power at this site it is not believed that WKH\ZRXOGEHVLJQL¿FDQWHQRXJKWRUHTXLUHPLWL- gatory action with proper environmental design. Figure 4. False Pass area geology. Figure 5. Waterfall Creek seen from 255’ elevation above sea level. Figure 6. Small cascade and pool in Waterfall Creek. Unga MannUngaaaUngaaa MMMMMaaanMMMMMMMMMaaaannnnnnnnn WaterfWaWatWaateatteterfarfarffafallll Page 4Living Systems DesignFalse Pass Hydro Recon: 20150910 WATERFALL CREEK SUMMARY $FFRUGLQJWRFDOFXODWLRQVSURYLGHGLQWKH%DNHUUHSRUWSRZHUSRWHQWLDOIRU:DWHUIDOO&UHHNLVOLNHO\ OLPLWHGWRDSSUR[LPDWHO\N:2XULQYHVWLJDWLRQVFRQ¿UPWKLVUDQJH*LYHQWKHOLPLWHGSRZHU SRWHQWLDODQGSRWHQWLDOGLI¿FXOW\LQGHYHORSLQJDFFHVVWRDQLQWDNHVLWHWKURXJKUXJJHGEHGURFN WRSRJUDSK\ZHFRQFOXGHGWKDW:DWHUIDOO&UHHNZRXOGQRWEHFDSDEOHRIKDYLQJDVLJQL¿FDQWSRVL- tive impact on energy security or costs for the community of False Pass. The site may be suitable IRUDVPDOORIIJULGGHYHORSPHQWRIVRPHNLQGHJ¿VKLQJORGJHDVORQJDVWKHV\VWHPFRXOGEH designed without the necessity of road access to the intake structure. UNGA MAN CREEK LOCATION & LAND STATUS 8QJD0DQ&UHHNÀRZVWRVDOWZDWHUPLOHV QRUWKRIWKHFRPPXQLW\)DOVH3DVV¶´ 1¶´:MXVWEHIRUHWKHWHUPLQXVRIWKH northern portion of the community road system. 7KHPDMRULW\RIWKHZDWHUVKHGLVRZQHGE\WKH Isanotski Corporation, with the uppermost por- WLRQV PDQDJHG E\ WKH $OHXWLDQV 3HQLQVXOD 1D- WLRQDO:LOGOLIH5HIXJH7KHORZHUUHDFKHVRIWKH creek are easily accessible via the road system, including a bridge with provides access to the FRPPXQLW\GXPSMXVWQRUWKRIWKHFUHHN GEOLOGY 7KH8QJD0DQ&UHHNYDOOH\LVPDSSHGDV$OOX- YLDO 'HSRVLWV LQ WKH YDOOH\ ERWWRP DQG 4XDWHU- nary Volcanics extending from the valley wall to WKHVXUURXQGLQJSHDNVVHH¿JXUH7KHPDLQ stem and primary tributaries remain active allu- vial channels today. Substrate between the lower extent of our survey (beginning at the bridge) and including approximately 1 mile upstream included sand, gravel, cobble and boulder with the surveyed reaches dominated by a gravel and cobble mix and the upper reaches dominated by FREEOHDQGJUDYHOPL[1RH[SRVHGEHGURFNZDV LGHQWL¿HGLQRUQHDUWKHFKDQQHOIRUWKHHQWLUH survey length. HYDROLOGY 8QJD0DQ&UHHNKDVDEDVLQDUHDRIDSSUR[L- PDWHO\VTXDUHPLOHVWKDWGUDZVIURPDSHDN HOHYDWLRQRIIHHW$¿HOGLQYHVWLJDWLRQRI 8QJD 0DQ &UHHN FRQGXFWHG LQ VXSSRUW RI WKH Baker report used the Drogue method to record DGLVFKDUJHLQ-DQXDU\RIDSSUR[LPDWHO\FIV2XU¿HOGFUHZXVHGD*OREDO:DWHU6\VWHPV ³)ORZ3UREH´WRUHFRUGIRXUPDQXDOGLVFKDUJHPHDVXUHPHQWVLQ8QJD0DQ&UHHNRYHUWKHFRXUVH RIRXU¿HOGVXUYH\WKDWUDQJHGIURPFIVWRFIV&RQYHUVDWLRQVZLWKDQXPEHURIORFDOUHVL- dents, the historically low snow accumulations from the previous winter and the lack of precipita- WLRQSUHFHGLQJWKHWLPLQJRIRXU¿HOGWULSVXJJHVWWKDWWKHÀRZVZHUHFRUGHGVKRXOGLQGLFDWHDQ DSSUR[LPDWHORZÀRZIRUWKHZDWHUVKHGGXULQJWKH6XPPHUPRQWKV Figure 7. View of Unga Man Creek watershed taken at 204 feet above sea level. Figure 8. View of Unga Man Creek relationship to APICDA fish processing plant and North end of town. PPPPlllanttPPPPlllaannntnttnntt TTToooowwnnTTTooTToooowwToowwwwowwnnwwnnnwn Page 5Living Systems DesignFalse Pass Hydro Recon: 20150910 A memo assembled by Polar Consult in support of this reconnaissance report calculated an estimat- HGDQQXDOUDQJHRIÀRZIURPFIVIRU8QJD 0DQ&UHHNEDVHGRQWKH86*6UHFRUGSURYLGHG at Russel Creek in nearby Cold Bay (see attach- ment). It was emphasized in this report that the ÀRZVDW5XVVHO&UHHNSURYLGHRQO\DYHU\URXJK HVWLPDWHRIÀRZVLQWKH8QJD0DQZDWHUVKHGEXW that these were the best data available for recon- naissance. The City and APICDA recognize the importance RI HVWDEOLVKLQJ DQ HPSLULFDO UHFRUG RI ÀRZ IRU 8QJD0DQ&UHHNDVDFULWLFDOVWHSLQGHWHUPLQLQJ Hydro-power feasibility and upon their initiative we installed two stream gages to begin that pro- FHVV7KH¿UVWVLWHZDVORFDWHGMXVWGRZQVWUHDP RIWKHEULGJHWKDWFURVVHV8QJD0DQ&UHHNDQG the second site was located approximately .2 PLOHVXSVWUHDPRIWKHEULGJHVLWHVHH¿JXUH Site selection was fairly challenging because of the lack of bedrock anywhere within the sur- veyed channel length and the limited availability of stable pool features. The size of the substrate within the channel and the bank full width of the FUHHNERWKLQGLFDWHWKDWDQQXDOÀRZVDUHKLJKDW times. Large Boulders were used for anchoring ERWKJDJHV6HH¿JXUH6WDLQOHVV+RER:DWHU Loggers were installed in stilling wells along with staff gages. Each station also includes its own barometric correction logger. City of False Pass VWDIIZHUHWUDLQHGLQXVLQJWKH*OREDO:DWHU6\V- WHPVÀRZSUREHIRUPDQXDOGLVFKDUJHPHDVXUH- PHQWVDQGWKH\ZLOOEHGRLQJWKH¿HOGZRUNQHF- essary to establish a rating curve for interpreting the water logger data. FISH & WILDLIFE 8QJD0DQ&UHHNLVQRWPDSSHGDVDQDQDGURPRXV VWUHDPLQWKH$:&KRZHYHURXUVLWHVXUYH\HQ- FRXQWHUHGDSSUR[LPDWHO\SLQNVDOPRQRYHU the course of the surveyed stream length. The Pinks were noted as attempting to spawn but no UHGGVZHUHLGHQWL¿HG7KHVL]HRIWKHVXEVWUDWHLQ the surveyed length may be prohibitive to much success for Pink salmon spawning. It is worth QRWLQJWKDWZDVDYHU\ELJ3LQNVDOPRQ\HDU with the third largest catch ever recorded. Five minnow traps were set in pools encountered along the survey length and were baited with VDOPRQHJJV7KHWUDSVVRDNHGIRU¿YHKRXUVDQG QRMXYHQLOHRUUHVLGHQW¿VKZHUHFDXJKW Figure 9. Stream gage installed near bridge over Unga Man Creek. Aluminum angle was cut and bolted to a large boulder and provided a mounting structure for a stilling well and staff gage. Figure 10. Stream gage installation locations. Figure 11. Minnow trapping just downstream of the bridge. Note spawned out Pink salmon in the back-kk ground. GGGGGaaagggggeeeGGGGGaaaagggggggeeeeee GGGageGGGGGagggee Page 6Living Systems DesignFalse Pass Hydro Recon: 20150910 The area surrounding Unga Creek is covered by Salmonberry thickets and alder shrubland patch- es. A variety of birds and mammals likely use the area as foraging and cover habitat. Although impacts from construction and plant operation would be associated with developing Hydro-power DWWKLVVLWHLWLVQRWEHOLHYHGWKDWWKH\ZRXOGEHVLJQL¿FDQWHQRXJKWRUHTXLUHPLWLJDWRU\DFWLRQZLWK proper environmental design. UNGA MAN CREEK SUMMARY $FFRUGLQJWRFDOFXODWLRQVSURYLGHGLQWKH%DNHUUHSRUWSRZHUSRWHQWLDOIRU8QJD0DQ&UHHNPD\ DYHUDJHN:2XULQYHVWLJDWLRQVZRXOGVXJJHVWWKDWWKHK\GURORJ\RIWKLVEDVLQFRXOGH[FHHGWKLV HVWLPDWH0XFKZLOOGHSHQGRQDGGLWLRQDO¿HOGZRUNWRGHWHUPLQHWKHQDWXUHRI8QJD0DQ&UHHN¶V DTXDWLFHFRORJ\GHYHORSLQJDORFDOUHFRUGRIÀRZDQGGHWHUPLQLQJWKHGHWDLOVRIDQHYHQWXDOSURM- HFWGHVLJQ7KDWKDYLQJEHHQVDLGWKHUHVXOWVRISUHYLRXVVWXGLHVDQGWKH¿HOGUHFRQQDLVVDQFH VXPPDUL]HGKHUHVXJJHVWWKDW8QJD0DQ&UHHNFRXOGPHHWWKHFRPPXQLW\¶VHQHUJ\GHPDQGIRU PRVWRIWKH\HDUDQGSURYLGHRQHRIWKHEHVWRSWLRQVLGHQWL¿HGIRUFRPPXQLW\HQHUJ\WRGDWH PRELIMINARY DESIGN OVERVIEW $UXQRIWKHULYHUGHVLJQIRU+\GURSRZHUDSSHDUVWREHZRUWKIXUWKHULQYHVWLJDWLRQDW8QJD0DQ &UHHN$UHODWLYHO\HDV\WRDFFHVVLQWDNHVLWHZDVLGHQWL¿HGDW IHHWDERYHVHDOHYHOMXVWGRZQ- VWUHDPRIWKHFRQÀXHQFHRIWKHWZRPDMRUWULEXWDULHVWKDWZRXOGSURYLGHDFROOHFWLRQSRLQWIRUWKH PDMRULW\RIWKHÀRZZLWKLQWKHZDWHUVKHG$SRZHUKRXVHVLWHFRXOGEHHDVLO\ORFDWHGGRZQVORSHRI WKHFRPPXQLW\GXPSDWDSSUR[LPDWHO\IHHWDERYHVHDOHYHO7KLVGHVLJQZRXOGSURYLGHDJURVV KHDGRIIHHWVHH¿JXUH ACCESS $FFHVVWR8QJD0DQ&UHHNDSSHDUVWREHYHU\VWUDLJKWIRUZDUG$QH[LVWLQJURDGH[WHQGVDQG crosses the creek and has already been roughed in to the powerhouse site noted above. Access to the intake site noted in this preliminary design could be constructed over what appears to be relatively easy road building conditions with limited to no bedrock cutting necessary and a mild DQGPRVWO\FRQVLVWHQWJUDGLHQWRYHUDOOXYLDODQGFROOXYLDOGHSRVLWV2QHVPDOOZHWODQGDUHDZRXOG need to be crossed and designed for as well as numerous steeper gradient ephemeral streams. - liminary design project area described below. Yellow line indicates area surveyed for reconnaissance. Page 7Living Systems DesignFalse Pass Hydro Recon: 20150910 INTAKE SITE AND PENSTOCK 7KHLQWDNHVLWHLGHQWL¿HGIRUWKLVSUHOLPLQDU\GHVLJQZDVVHOHFWHGDWDQDWXUDOFKDQQHOQDUURZLQJ MXVWGRZQVWUHDPRIWKHFRQÀXHQFHRIWKHWZRPDMRUWULEXWDULHVWR8QJD0DQ&UHHN7KLVVLWHZRXOG provide an access point that would support a penstock route that would rapidly exit the active ÀRRGSODLQDQGFRXOGEHEXULHGLQWKHDFFHVVURDGIRUWKHUHVWRILWVGHFHQWWRWKHSRZHUKRXVH7KLV site would necessitate a design that could be anchored in alluvial sediments of cobble and boulder DQGPD\UHTXLUHVRPHFKDQQHOVWDELOL]DWLRQXSVWUHDPWRNHHSKLJKÀRZHYHQWVIURPPRYLQJWKH FKDQQHODURXQGWKHLQWDNHVLWH7KLVVLWHZRXOGDOVRQHHGWREHGHVLJQHGWRZLWKVWDQGKLJKÀRZ HYHQWVDQGWUDQVSRUWUHODWLYHO\ODUJHTXDQWLWLHVDQGVL]HVRIEHGORDG2IDOORIWKHLQIUDVWUXFWXUH included in this preliminary design, the intake structure looks to be the most challenging. POWERHOUSE SITE A powerhouse site could be located down-slope of the community dump in a location that would VXSSRUWHDV\FRQVWUXFWLRQRIDWDLOUDFHUHWXUQRIWKHZDWHUDSSUR[LPDWHO\IHHWLQHOHYDWLRQDERYH where the creek meets saltwater. TRANSMISSION A transmission line from the powerhouse could be run back over the bridge and along the existing URDGIRUDSSUR[LPDWHO\IHHWWRFRQQHFWWRWKHFRPPXQLW\JULG Figure 13. Preliminary design for Unga Man Creek run of the river Hydro-power project. IIInnnnttttaaakIIInnnnttntttttannntttttaaatttaaakkkeeekkkeeekkkeeekkkeee PPoowwer-hhousePoPPPoowPoowweowweewerr-r-r-hhousoouuseeseRRoad & PPeennssstRRoRoaRooadoaad &add& P&PPPeeePPPPeeeenPPPPeeeeennnsssensssttttoooooccckkkkknssstttnsssssttossstttttttoooooccttooooccckooccckkkkckTransmissionTrTraTrraransmissississsionionn UUUUnnnnggggaaa MMMMaaaannnn WWWWaaattterrrrsshhhheddUUUUnnnngggggaaaa MMMMaaaaaannnnnn WWWWaaaaaatttteeeerrrsssshhhheeeeddddWWWWaaaaatWWaaatttteaattteeeeetteerrrrsrrrrssssrssssshhhheeddddeeeeddddedd Page 8Living Systems DesignFalse Pass Hydro Recon: 20150910 COST ESTIMATE 3RODU&RQVXOWSUHSDUHGDSURMHFWSHUIRUPDQFHDQGGHVLJQFRVWHV WLPDWHPHPRVHHDWWDFKPHQWLQ support of a Round 9 Renewable Energy Fund proposal that included estimated costs for feasibility, design, permitting, and construction shown below. ECONOMIC ANALYSIS Using the estimated costs included above, and the estimate performance show in below, the AEA (FRQRPLF0RGHOZRUNVKHHWZDVXVHGWRGHYHORSDQLQSXWWREHQH¿W UDWLRRI1.82 (see attachment). CONCLUSION SUMMARY Based on the information provided in this reconnaissance effort, a run of the river Hydro-power SURMHFWORRNVWREHDYLDEOHRSWLRQIRUJUHDWO\HQKDQFLQJFRPPXQLW\HQHUJ\VHFXULW\DQGFRVWV :RUNLQJZLWK3RODU&RQVXOWDSUHOLPLQDU\SURMHFWGHVLJQVHHDWWDFKPHQWLVHVWLPDWHGWRVXSSRUW DGHVLJQFDSDFLW\RIN:ZKLFKZRXOGPHHWDSSUR[LPDWHO\RIWKH)DOVH3DVV8WLOLW\ORDG RECOMMENDATIONS ,QDGGLWLRQWRHVWDEOLVKLQJDUHFRUGRIÀRZXVLQJWKHH[LVWLQJVWDWLRQVZHUHFRPPHQGWKHLQVWDO- lation of an additional station closer to the prospective intake site included in the preliminary de- VLJQ)LHOGPHDVXUHPHQWVRIÀRZLQGLFDWHLWPD\EHSRVVLEOHWRDFFHVVPRUHZDWHUIXUWKHUXSWKH YDOOH\EHFDXVHOHVVZRXOGEHORVWWRVXEVXUIDFHÀRZ:HDOVRUHFRPPHQGWKDWDGGLWLRQDOPLQQRZ trapping, spring beach seining and spawning habitat mapping be performed to better characterize WKHDTXDWLFHFRORJ\RIWKLVVWUHDP0DSSLQJRISURMHFWDUHDZHWODQGVZRXOGSURYLGHHVVHQWLDOLQ- IRUPDWLRQLQVXSSRUWRI¿QDOGHVLJQZRUNDQGSHUPLWWLQJIRUFRQVWUXFWLRQ$QG¿QDOO\JHRWHFKQLFDO surveys could provide important design condition information for the intake site. Figure 14. Table 4 Cost estimate table from Polar Consult Memo (see attached). Figure 14. Table 3 “Preliminary Estimated Performance” from the Polar Consult Memo (see attached).