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Home My WebLink AboutFalls Creek Reconnaissance Report 2009Falls Creek Proposed Hydroelectric Project Reconnaissance Report Prepared for: Kenai Hydro, LLC Prepared by: ~ -HDR Alaska, Inc. 2525 C Street, Suite 305 Anchorage, AK 99503 March 2009 Falls Creek Proposed Hydroelectric Project Reconnaissance Table of Contents Introduction .......................................................................................................................... ! Project Area ................................................................................................................ 1 Previous Studies .......................................................................................................... 2 Environmental Considerations ............................................................................................. 2 Fish Resources ............................................................................................................ 3 Wetlands ..................................................................................................................... 3 Hydrology and Water Quality ..................................................................................... 4 Recreation ............................................................................................................................ 4 Subsistence, Cultural and Historical Resources ................................................................... 5 Subsistence .................................................................................................................. 5 Cultural and historic resources ................................................................................... 5 Land Ownership, Mining Claims, and Water Rights ........................................................... 6 Project Arrangement ............................................................................................................ 6 Project Description ..................................................................................................... 7 Energy Generation ............................................................................................................... 7 Cost Estimates ...................................................................................................................... 8 Assumptions ............................................................................................................... 8 Results ......................................................................................................................... 9 Economic Evaluation ........................................................................................................... 9 Conclusions and Recommendations .................................................................................... 9 References .......................................................................................................................... ! 0 Tables ............................................................................ ; ................................................... 12 Figures ................................................................................................................................ 17 Falls Creek-Proposed Hydroelectric Project Reconnaissance Report Appendix A -Land Status Information ............................................................................. 25 Appendix B -Energy Calculations .................................................................................... 29 Appendix C -Cost Information ......................................................................................... 33 Appendix D -Project Photographs .................................................................................... 39 List of Tables Table 1. Falls Creek scale factors (determined by APA 1984) used to simulate flow of Falls Creek from stream flow data collected at Grant Creek ........................... 13 Table 2. Temperature comparisons for Grant Lake, Grant Creek and Falls Creek ......... 14 Table 3. 2008 instantaneous flow measurements collected at Falls Creek by HDR staff, October to December 2008 .............................................................................. 14 Table 4. USFS campgrounds on the Kenai Peninsula ..................................................... 15 Table 5. USPS-maintained trails on the Kenai Peninsula ................................................ 15 Table 6. Parameters for the project arrangement considered for Falls Creek .................. 16 List of Figures Figure 1. General location of proposed hydroelectric facilities at Falls Creek on the Kenai Peninsula, Alaska .................................................................................. 18 Figure 2. The anadromous reach of Falls Creek .............................................................. 19 Figure 3. Mean monthly discharge of Falls Creek, modeled using data from USGS gage 15246000 (1947-1958) at Grant Creek ............................................................ 20 Figure 4. Flow duration curve for Falls Creek ................................................................. 20 Figure 5. Falls Creek modeled discharge based on data from USGS gauge 15246000 (194 7 -1958) at Grant Creek ............................................................................. 21 Figure 6. Private parcels of Falls Creek area ................................................................... 22 Figure 7. Water rights and mineral claims in the Grant Lake area .................................. 23 Figure 8. Proposed project arrangement at Falls Creek ................................................... 24 11 ADF&G AEIDC AHRS APA AWC BLM oc cfs em op DNR EPA FERC ft G&A GWh HEP In KPB kWh LLC ml mm MSL MW MWh NWI O&M RVDs USACE USFS USFWS USGS Falls Creek Proposed Hydroelectric Project Reconnaissance "'"..-.,. .. , Acronyms and Abbreviations Alaska Department of Fish and Game Arctic Environmental Information and Data Center (University of Alaska) Alaska Heritage Resources Survey Alaska Power Authority Anadromous Waters Catalog Bureau of Land Management Degrees Celsius Cubic feet per second centimeter Degrees Fahrenheit Alaska Department of Natural Resources Environmental Protection Agency Federal Energy Regulatory Commission feet general and administrative Gigawatt-hours Hydroelectric Evaluation Program inch Kenai Peninsula Borough kilowatt-hours Limited liability company mile millimeter Mean sea level Megawatt Megawatt-hours. National Wetlands Inventory Operations & maintenance Recreation visitor days U.S. Army Corps of Engineers U.S. Forest Service U.S. Fish and Wildlife Service U.S. Geological Survey iii Introduction Falls Creek Proposed Hydroelectric Project Reconnaissance Kenai Hydro LLC (KHL) contracted with HDR Alaska, Inc. to evaluate the feasibility of small- scale hydroelectric projects at Crescent Lake, Ptarmigan Lake, Falls Creek, and Grant Lake near Moose Pass, Alaska (Figure 1). This reconnaissance report examines the viability of small-scale hydroelectric energy generation at Falls Creek that would minimize environmental and other impacts. A team consisting of engineers and environmental scientists made reconnaissance-level site visits and analyzed existing information in order to determine if further feasibility analyses were appropriate based on potential constructability, cost effectiveness, and potential environmental impacts. The scope of work defined for this assignment included: • Field reconnaissance by team members; • Review of available project documentation and related information; • Development of conceptual alternatives; • Review of existing hydraulic and hydrologic parameters; • Estimation of energy production and project costs; • Preparation of this reconnaissance report. This report should be considered a high-level overview intended to identify projects which demonstrate a basic measure of feasibility and to eliminate projects that have evident fatal flaws from an engineering and environmental perspective; this report also provides information to enable KHL to determine economic feasibility. Project Area The project is located approximately 1.5 miles south of the community of Moose Pass, Alaska (pop. 206), approximately 25 miles north of Seward, Alaska (pop. 3,016),just east of the Seward Highway (State Route 9); this highway connects Anchorage (pop. 279,671) to Seward (Figure 1). The Alaska Railroad parallels the route of the Seward Highway, and is also adjacent to the project area. The town of Cooper Landing is located 24 miles to the northwest and is accessible via the Sterling Highway (State Route I) which connects to the Seward Highway approximately 10 miles northwest of Moose Pass. Falls Creek flows into Trail River just downstream of Lower Trail Lake (approximately 1.8 miles downstream of Grant Creek). The Falls Creek watershed drains steep terrain between the Grant Lake and Ptarmigan Lake watersheds, is 11.9 square miles in area, contains no lakes, and has no major tributaries. Estimated mean annual flow of Falls Creek is 38 cfs; stream flow during the winter is minimal. Falls Creek is 42,240 ft (approximately 8 miles) long, average Falls Creek Proposed Hydroelectric Project Reconnaissance stream gradient is 418 ft/mi and stream width averages 15 ft wide. The Falls Creek substrate includes cobble, boulder deposits, few gravel bars and a thin layer of fine silt near the mouth; the lower one mile of stream has been extensively channelized and modified by placer mining (APA 1984). Three to four acres adjacent to the active channel in the lower 0.5 miles are covered with tailings and 100 yards of the streambed in this area has been relocated (AEIDC 1982). The lower 2,300 ft of Falls Creek is classified as anadromous in the ADF&G Anadromous Waters Catalog (A WC). Anadromous fish species present in Falls Creek included juvenile Chinook (Oncorhynchus tshawytscha) and juvenile Dolly Varden (Salvelinus malma) (USFWS 1961, Johnson and Daigneault 2008, AEIDC 1982). Previous Studies The hydroelectric potential at Grant Lake, approximately 1 mile north of Falls Creek, has been evaluated several times as a potential power source for the Seward/Kenai Peninsula area. In 1954 R.W. Beck and Associates (cited in APA 1984) prepared a preliminary investigation and concluded that a project was feasible. In 1980 CH2M Hill (cited in APA 1984) prepared a pre- feasibility study for a Grant Lake project and concluded that a project developed at the site was feasible. The most extensive study was performed by Ebasco Services, Inc. in 1984 for the Alaska Power Authority (APA 1984). Falls Creek (Figure 1) was investigated by Ebasco in 1984 for the Alaska Power Authority (now Alaska Energy Authority) as a possible source of additional flows that could be diverted to nearby Grant Lake in support of a hydroelectric project there (APA 1984). Environmental Considerations The following presents a general overview of potential expected environmental considerations for a hydroelectric project at Falls Creek. This section describes fish resources, wetlands, hydrology and water quality, recreation, subsistence, and cultural resources of the project area. The area is managed using several specific management plans, including the Chugach National Forest Plan (Meade 2006), Kenai River Comprehensive Management Plan (DNR 1998), and Kenai Borough Coastal Management Plan (KPB 2008). Another search for all relevant land management plans would be required as part of FERC licensing and by other required permitting processes. Ebasco (APA 1984) compiled a feasibility report on the Grant Lake hydroelectric project, including detailed environmental studies of water use and quality; aquatic, botanical and wildlife resources; historical and archaeological resources; socioeconomic impacts; geological and soil resources; recreational resources; aesthetic resources; and land use. The Arctic Environmental Data Center (AIEDC 1982 and 1983) and USFWS (1961) conducted environmental baseline studies in the project area. For the purposes of this feasibility report, HDR Alaska did not conduct any environmental work beyond initial reconnaissance visits and instantaneous flow measurements (see Hydrology and Water Quality below) and this overview draws mainly on these historical reports. 2 Fish Resources Falls Creek Proposed Hydroelectric Project Reconnaissance "'""'"'"' The lower 2,300 ft of Falls Creek is classified as anadromous in the A WC (Figure 2) (Chinook salmon present; Johnson and Daigneault 2008). Anadromous species, including juvenile Chinook salmon and juvenile Dolly Varden have been found in its lower section; a series of waterfalls prevents fish passage above the lower 2,300 ft of the stream (USFWS 1961, Johnson and Daigneault 2008, AEIDC 1982). Current 2009 sport fishing regulations allow sport fishing on Falls Creek June 11 -May l. Falls Creek is closed to all salmon fishing. Rainbow trout (Oncorhynchus mykiss) are limited to one fish less than 16 inches long per day. Dolly Varden fishing is limited to one fish less than 16 inches long per day 1• Current sport fishing effort is unknown. Previous investigators suggested that Falls Creek may have limited salmon spawning potential in its anadromous reach due to low water temperatures that may limit its production; this was supported by a lack of observations of spawning salmon during week-long field visits in October 1981 and March, May, June, and August 1982 (AEIDC 1982 and 1983) and "frequent" stream surveys during late summer 1959 and 1960 when salmon were running in adjacent streams (USFWS 1961 ). Instream cover available to juvenile fish consists of debris jams and a few cutbank meanders (AEIDC 1982). Local residents have reported that salmon spawning did (AIEDC 1983) and did not (USFWS 1961) occur in Falls Creek. Seward ADFG biologist T. McHenry also reported that salmon spawn in lower Falls Creek (pers. comm. in AIEDC 1983). In minnow trapping from August 1959 through January 1961, juvenile Chinook were only caught in the lower 200 yards of the stream, though traps were set from the mouth to one mile upstream (February through April and December not sampled; USFWS 1961). Dolly Varden, including juveniles, were caught throughout the sampling area. Coastrange sculpin (Coitus aleuticus) and slimy sculpin (Cottus cognatus) were caught during August (USFWS 1961). Investigators sampling fish in Falls Creek from 1981 to 1982, caught less species than in 1959- 1961. Minnow trapping from the mouth of Falls Creek to the area just below the active mine (October 1981; March, May, June and August 1982) only Dolly Varden were caught in Falls Creek. Dolly Varden were caught throughout the creek including in the area just below the active mine. These fish were caught during all months sampled except March and May 1982; in winter, Falls Creek was frozen solid and provided no overwintering habitat (AIEDC 1983). Wetlands No detailed wetland information exists in historical reports for the Falls Creek area. No additional investigation of wetlands was performed for the purposes of this feasibility report. Data regarding wetlands resources in the project area are available from the National Wetlands Inventory (NWI) mapping system; evaluation of this database was outside the scope of this reconnaissance-level report. 1 http://www.sf.adfg.state.ak.us/statewide/regulations/southcentrai/SCkenai.pdf 3 Hydrology and Water Quality Falls Creek Proposed Hydroelectric Project Reconnaissance Report Continuous streamflow data was collected from May to October 1982 as part of the Ebasco studies (APA 1984). This streamgage was located near the mouth of Falls Creek. The average flow during this period was 38 cfs . Because of the short period of record at Falls Creek, long term estimates of the flow in Falls Creek were estimated by comparison to adjacent Grant Creek which was gaged continuously by the USGS for 11 years between 194 7 and 195 8. This gage (USGS # 15246000) was located approximately 0.3 miles upstream of the mouth of Grant Creek. To estimate the hydrology of Falls Creek, the mean daily flows from the Grant Creek gage for May through September were scaled by factors determined by Ebasco (APA 1984; Table 1) to create a simulated daily flow file. In estimating the hydrology for hydropower generation, Ebasco assumed that flows in Falls Creek would be minimal during the months of November through April and therefore generation would not be possible (and therefore was not estimated). Ebasco estimated the average monthly flow for May through October to be 56 cfs (Figure 3). During these ice-free months, Falls Creek's average monthly flow was lowest in May (8 cfs) and October (11 cfs), and highest in mid summer (approximately II 0 cfs). Estimated flows rarely exceeded 200 cfs or dropped below 70 cfs (Figure 4). Water temperature in Falls Creek was generally colder than neighboring Grant Creek, ranging from 7.0°C (12.6°F) colder in July, 1959, to 2.5°C ( 4.5°F) colder in October 1981 (APA 1984; Table 2). Water quality of Falls Creek was typical of low-productivity Kenai Peninsula area streams (AElDC 1982). HDR measured stream flow and stream dimensions at Falls Creek on October 5 and October 24, 2008 (Table 3). Measurements were taken at a site approximately 100 ft downstream of the Seward Highway Bridge, using standard USGS gauging protocols. Falls Creek modeled discharge data were compiled with field measurements from 2008; field-measured values fell within the expected range of modeled values (Figure 5). Recreation The Kenai Peninsula supports significant tourism from residents of the region, of Anchorage, of Alaska and from outside of Alaska. Kenai Peninsula Borough Coastal Management Plan (KPB 2008) includes the lower portion of Falls Creek as a designated recreation use area. The U.S. Forest Service (USFS) administers Chugach National Forest, which surrounds most of the project area; Falls Creek is located within the Seward Ranger District. Peak use of area campgrounds (Table 4) coincides with salmon runs (APA 1984). Total recreational use of Seward Ranger District campgrounds in 1981 was estimated at 442,400 recreation visitor days (RVDs), representing 40% of 1.1 million total RVDs for the entire Chugach National Forest (APA 1984). The project area is not developed for recreation, with the exception of a primitive route (not maintained by USFS) to mining claims on Falls Creek. USFS-maintained trails of the Kenai Peninsula are shown in Table 5. The USFS has plans for the Iditarod Trail in the local area, and 4 Falls Creek-Proposed Hydroelectric Project Reconnaissance Report the location of these proposed improvements will need to be identified in future work. More detailed information assessing recreational use of the project and adjacent areas is needed in order to comply with requirements of the Federal Energy Regulatory Commission (FERC) license application. Detailed user data are available upon request from the USFS. The project area receives unknown levels of recreational use such as hunting, recreational mining, hiking, backpacking and camping, mostly in spring and summer. Actual use of the Falls Creek area in the 1980s was limited to snow machining and horseback riding (AIEDC 1983). Snowmobiles continue to utilize the area in winter. The project lies within the Ptarmigan/Grant Lake subunit of Chugach National Forest for backcountry motorized winter use, and receives very little use from any winter user group (motorized or non-motorized; Meade 2006). Helicopter skiing is also permitted in the Ptarmigan/Grant Lake subunit (Meade 2006). Game animals present in the area are likely the same as those present at Grant Lake: mountain goat, black bear, brown bear, Dall sheep, and moose (APA 1984). The USFWS (1961) reported that Falls Creek received no fishing pressure; AIEDC (1982) found evidence of sport fishing at the confluence of Falls Creek with Trail River. Subsistence, Cultural and Historical Resources Subsistence Falls Creek and the surrounding areas are not designated a subsistence use area by the Kenai Peninsula Borough Coastal Management Plan (KPB 2008). Qualified residents of Cooper Landing may harvest moose in game units 7, 15A and 15B on the Kenai Peninsula under Federal subsistence regulations2 (Falls Creek is located in game unit 7.) Federally-qualified subsistence users of Cooper Landing are also allowed to take salmon through a dip net/rod-and-reel fishery, and lake trout, Dolly Varden, and rainbow trout in the Kenai River through a rod-and-reel fisher/. A more detailed analysis of subsistence uses of the project area will be required by FERC licensing and other permitting processes. Cultural and historic resources Based on a preliminary investigation of Alaska Heritage Resources Survey (AHRS) data at the State Office of History and Archaeology, 65 cultural resource sites have been documented in the general vicinity of Grant Lake, Falls Creek, and Ptarmigan Lake. Several of the sites are listed on or eligible for the National Register of Historic Places. Most cultural resource sites are located along Upper and Lower Trail lakes and Trail River. Several mining-related sites are located in the area between Falls Creek and Grant Lake. A more detailed review of cultural and historic resources of the project area will be necessary to comply with requirements ofthe FERC license application process. 2 http://alaska.fws.gov/asm/newsrel/r050208.html 3 http://alaska.fws.gov/asm/newsrel/r0511 07.html 5 Falls Creek--Proposed Hydroelectric Project Reconnaissance Report Land Ownership, Mining Claims, and Water Rights HDR researched public land, private holdings, mineral claims and water rights of the Falls Creek area using information from Alaska Department of Natural Resources (DNR) land status maps4 and case file abstracts 5, the Bureau of Land Management (BLM)6, the State Recorder's Office7 and Kenai Peninsula Borough8 . All lands on which project facilities would be located are under either State or Federal ownership (Figure 6). No private lands are known to overlap with project facility footprints. Private property (33 parcels; Figure 7) is located along the Seward Highway and the lower portion of the Falls Creek access route. Falls Creek is used extensively for placer mining during summer months (APA 1984; also seen during HDR site visits in 2008). Land adjacent to Falls Creek is almost continuously claimed for placer mining from 1,300 ft elevation to the mouth for the creek. Mining claims are located both along Falls Creek and on hillsides of the drainage (15 federal mining claims and four state mining claims within the project area). Several of these claims were seen during site visits and are located in the vicinity of the preferred intake site (Figure 7; see Appendix A for more information). A search of official records found that the Falls Creek project area contains one subsurface water right at its far west end (Figure 7). APA (1984) noted that several cabins were located within 2 miles of the mouth of Falls Creek and operated under USFS special use permits; water was likely carried in from outside the project vicinity. A water right of 1 cfs was reported (for placer mining on Falls Creek at 1200 ft elevation; APA 1984). Project Arrangement This section of the report describes arrangement of a project for hydroelectric generation at Falls Creek. Two project alternatives were evaluated for Falls Creek: • The alternative described in this report would be a stand-alone project that would discharge its water back into Falls Creek. This project would be run of the river because the Falls Creek basin is to steep to create a significant amount of storage. • Another project alternative (described in the Grant Lake Reconnaissance Report; HDR 2009) would divert water from Falls Creek north to Grant Lake, where water would be 4 http://mapper.landrecords.info/ 5 http://dnr.alaska.gov/projects/las/lasmenu.cfin 6 http://sdms.ak.blm.gov/sdms/ 7 http://dnr.alaska.gov/ssdlrecoff/search.cfin 8 http://www .borough.kenai.ak.us/assessingdept/ 6 Fails Creek-Proposed Hydroelectric Project Reconnaissance Report used to generate power from the Grant Lake project. This alternative has the advantage of using Grant Lake for storage. Project Description The intake for Falls Creek would be located at approximately the 800 ft elevation (Figure 8). Water would be conveyed to the powerhouse via a 40-inch diameter 5,000-foot-long above ground steel penstock supported on concrete saddles. The powerhouse would be located at approximately elevation 500 and would contain a single Turgo-type turbine, synchronous generator and associated switchgear and controls. A new 0.25-mile access route to the powerhouse would branch from an existing route which begins near the downstream end of Lower Trail Lake. The access route to the intake would use an upgraded existing mining route, with only a short spur needed to the intake. An overhead transmission line would following the powerhouse access route. Key project parameters are presented in Table 6 below. Maximum headwater elevation would be 800ft, with a minimum headwater of 500 ft. Tailwater elevation would also be at 500 ft (powerhouse located alongside Falls Creek). Net head for this run-of-the-river project would be approximately 245 ft. Design flow was I 05 cfs, resulting in a capacity of 1.8 MW (see Turbine Sizing below). Average inflow was estimated to be 56 cfs (Table 6). For determining turbine size, the rated flow of the turbine was sized at 15% on the flow duration curve for the months the project would be in operation. This resulted in a design flow of 105 cfs, and a capacity of 1.8 MW. A sensitivity analysis indicated that design flows within 10% of this assumption yield near identical energy generation estimates, demonstrating that this assumption was appropriate for this level of study. Energy Generation The energy generation for Alternative 1 was estimated using HDR's proprietary software "Hydroelectric Evaluation Program" (HEP). HEP is specifically designed to model run-of-river operations. HEP uses tabulated daily flows, turbine and generator efficiencies, friction coefficients and physical parameters to simulate ·energy production for a period of stream flow record. Turbine and generator efficiencies are determined from tables. Output from HEP consists of effective capacity rating of the unit(s), simulated production in MWh, percent operating time and overall plant factor. The following assumptions were used in modeling energy production: • The project would not operate during the months of November through April • All available flow was used for energy production. There was no minimum instream flow release in the bypass reach of Falls Creek. Using these assumptions the average annual energy generation was estimated at 3,900 MWh corresponding to an annual plant factor (the average percentage of full capacity used over a 7 Falls Creek-Proposed Hydroelectric Project Reconnaissance Report given period of time) of 24%. Plant factor was very low because the project would be shut down due to low flows approximately 223 days per year (see Appendix B , Energy Calculations). Cost Estimates An opinion of probable construction costs was derived for the project presented above. The approach used was to develop base work units and unit prices and then apply these units and prices consistently to the various project features. Assumptions The following assumptions were used in the cost estimate: • Indirect construction costs associated with engineering, construction management, licensing, permitting and the owner's internal costs were added to the direct construction cost estimate as either percentages or lump sum amounts. • Design engineering was assumed to be 10% of the total direct construction costs. • A lump sum value of $1,000,000 was assumed to provide environmental baseline studies in support of the FERC licensing application. As well as preparation for the FERC licensing application. • The Owner's General Administration and Overhead of the design and construction was assumed to be 5% of the total direct construction costs. • Construction management was assumed to be 5% of the total direct construction costs. • A contingency of 30% was added to the total of the direct and indirect construction costs to reflect uncertainties of layout and design that wouldn't be resolved until later in the development process. • Interest accrued during a 3-year construction period was assumed to be 7% and was added to the total of the direct and indirect construction costs. • The estimate assumed first-year operations and maintenance (O&M) expense were comprised of the following three expenses o Total labor, expenses and owner's general and administrative (G&A) expenses were estimated at $300,000/yr9 • 9 The estimated G&A expense could be reduced if several of the sites investigated are constructed which would allow some economies to be realized between the similar operations ofthe hydroelectric projects. 8 Falls Creek~ Proposed Hydroelectric Project Reconnaissance Report o A repair and replacement fund of $50,000 was also included. o General liability and business interruption insurance was estimated at $1.00 per $100.00 of asset. • Cost estimates assumed that the project would be designed for un-manned operations and would be part of a larger organization; thereby the project would experience lower administrative expenses. On-site O&M labor would be limited to periodic inspections and seasonal maintenance. Results It is estimated that a run-of-river project on Falls Creek would cost $17.3 million in 2008 dollars (see Appendix C, Cost Information). Economic Evaluation A detailed economic evaluation was not included in the scope of this work. However, in order to provide a conceptual view ofthe economics, we have made some general assumptions. We have chosen to present the results as estimated annual cost per kilowatt-hour (kWh) in 2008 dollars. In deriving these costs, we assumed that the project could be financed through the issuance of bonds. Our assumption was that 100% of the debt would be financed at 6% for 30 years. Using these assumptions, the stand alone project would have a 2008 price of energy of $0.451 per kWh. Conclusions and Recommendations The stand-alone project alternative evaluated in this report has an estimated 2008 price of energy of $0.451 per kWh. This cost is high compared to other generation options available to KHL. The cost is high primarily because there is no storage available within the basin and because the plant would be shutdown for 60% of the year. The second alternative which would divert water from Falls Creek north to Grant Lake, where water would be used to generate power from the Grant Lake project was reviewed as part of Grant Lake feasibility studies (HDR 2009), and may be a more feasible option than a stand-alone project at Falls Creek. 9 Falls Creek Proposed Hydroelectric Project Reconnaissance References Alaska Department of Natural Resources (DNR). 1998. Kenai River Comprehensive Management Plan. Rep. from Division of Land and Division of Parks and Outdoor Recreation in conjunction with Alaska Department of Fish and Game, Habitat and Restoration Division, and Kenai Peninsula Borough. Anchorage, Alaska. Alaska Power Authority (APA). 1984. Grant Lake Hydroelectric Project Detailed Feasibility Analysis. Volume 2. Environmental Report. Rep. from Ebasco Services Incorporated, Bellevue, Washington. Arctic Environmental Information and Data Center (AEIDC). 1982. Preliminary summary of environmental knowledge of the proposed Grant Lake hydroelectric project area. Interim report submitted to Ebasco Services, Inc., Redmond, Washington, University of Alaska, Anchorage, Alaska. Arctic Environmental Information and Data Center (AEIDC). 1983 Summary of environmental knowledge of the proposed Grant Lake hydroelectric project area. Final Report submitted to Ebasco Services, Inc., Redmond, Washington, University of Alaska, Anchorage, Alaska. Buchanan, T.J., and Somers, W.P. 1969. Discharge measurements at gauging stations. In Chapter A8, Book 3, Techniques of water resources investigations of the United States Geological Survey. CH2M Hill. 1980. Feasibility assessment-hydropower development at Grant Lake. City of Seward, AK. HDR Alaska, Inc. (HDR). 2009. Grant Lake proposed hydroelectric project draft reconnaissance report. Submitted to Kenai Hydro, LLC. Johnson, J. and M. Daigneault. 2008. Catalog of waters important for spawning, rearing, or migration of anadromous fishes Southcentral Region, Effective June 2, 2008. Alaska Department of Fish and Game, Special Publication No. 08-05, Anchorage, Alaska. Kenai Peninsula Borough (KPB). 2008. Coastal management plan. Effective June 2008. Meade, J. 2006. Draft environmental impact statement: Kenai winter access. United States Department of Agriculture, Forest Service, Alaska Region, Chugach National Forest. Anchorage, Alaska Plafker, G. 1955. Geologic investigations of proposed power sites at Cooper, Grant, Ptarmigan, and Crescent Lakes, AK. U.S. Geological Survey Bulletin 1 031-A. U.S. Government Printing Office, Washington D.C. 10 Falls Creek-Proposed Hydroelectric Project Reconnaissance Report Quilliam, R. 1982. Personal communication. 1982. Resource Assistant, U.S. Department of Agriculture, Forest Service, Chugach National Forest, Seward, AK. R. W. Beck and Associates. 1982. Kenai Peninsula power supply and transmission study supplement. U.S. Fish and Wildlife Service (USFWS). 1961. Ptarmigan and Grant Lakes and Falls Creek, Kenai Peninsula, Alaska, progress report on the fish and wildlife resources. Department of the Interior. Juneau, Alaska. U.S. Geological Survey (USGS). 1981. Surface water quality records, Southcentral Alaska, 1949-1974. Unpublished computer printout. 11 Tables 12 Falls Creek-Proposed Hydroelectric Project Reconnaissance Report-Tables Table 1. Falls Creek scale factors (determined by APA 1984) used to simulate flow of Falls Creek from stream flow data collected at Grant Creek. Month Scale factor October 6.2% November 0 December 0 January 0 February 0 March 0 April 0 May 5.2% June 24.2% July 21.2% August 14.6% September 13.4% 13 Falls Creek-Proposed Hydroelectric Project Reconnaissance Report-Tables Table 2. Temperature comparisons for Grant Lake, Grant Creek and Falls Creek. Adapted from Table 2-8 in APA (1984). Values for Grant Lake were surface temperatures. Temperature difference between Falls Grant Lake Grant Grant Cr. and Grant Cr Date Source Lake CF} Cr. {°F} {oF} {oF} 111311959 USFWS (1961) 39.9 32.5 6/8/1960 " " 46.0 41.0 6/1711960 " " 53.1 7/2011960 " " 53.1 52.0 41.0 1.1 8/811960 " " 55.0 52.0 3.1 8/1311960 " " 52.0 51.1 44.1 0.9 9/111960 " " 50.0 42.1 9/1411960 " " 48.9 41.0 10116/1930 " " 44.1 42.1 36.0 2.0 1011311981 AIEDC ( 1982) 45.0 42.8 38.3 2.2 3/2/1982 " " 35.6 33.8 1.8 6/911982 " " 43.9 43.7 39.2 0.2 8/311982 " " 57.2 54.5 41.9 2.7 Average Temperature Difference {°F} 1.7 Table 3. 2008 instantaneous flow measurements collected at Falls Creek by HDR staff, October to December 2008. Date 10/5/2008 10/24/2008 Instantaneous discharge (cfs) 22.1 13.9 14 Stream width (ft) 19.1 16.7 Temperature difference between Grant Cr. and Fails Cr. 11.0 7.0 6.1 4.5 4.5 12.6 7.6 Falls Creek-Proposed Hydroelectric Project Reconnaissance Report-Tables Table 4. USFS campgrounds on the Kenai Peninsula. Location Number of sites Cooper Creek 26 Crescent Creek 9 Porcupine Creek 24 Primrose Creek 10 Ptarmigan Creek 16 Quartz Creek 45 Russian River 84 Table 5. USPS-maintained trails on the Kenai Peninsula. Location Length (mi) Carter Lake 3.5 Crescent Creek 6.4 Devil's Pass 10 Grayling Lake 1.5 Gull Rock 5.1 Hope Point 2.5 Johnson Pass 23 Lost Lake 7.5 Primrose 7.5 Ptarmigan Creek 7.1 Rainbow Lake 0.24 15 Falls Creek Proposed Hydroelectric Project Reconnaissance Report-Tables Table 6. Parameters for the project arrangement considered for Falls Creek. Elevations of maximum headwater (HW), minimum HW, tailwater elevation and net head (in feet) are given for each alternative. Design flow ( cfs ), capacity (MW), average inflow (cfs), and active storage are detailed for the project. Parameter Value Max. HW, ft 800 Min. HW, ft 800 Tailwater, ft 500 Net Head, ft 245 Design Flow, cfs 105 Capacity, MW 1.8 Avg. Inflow, cfs 56 Active Storage, AF 0 16 Figures 17 ~·~ ~ Falls Creek-Proposed Hydroelectric Project Reconnaissance Report -Figures K.nal Hydro FacUlty I -- Siting Project -=---lill ----~ ---Propoud I o------··~-- Project Stucly At.a c:::::J-·-...... ...... _ Figure 1. General location of proposed hydroelectric facilities at Falls Creek on the Kenai Peninsula, Alaska. · 18 Falls Creek-Proposed Hydroelectric Project Reconnaissance ·Report -Figures Proposed Project Study Area -stream ............._ Anadnomous Reach Land St.llue • Alaeka Railroad 0Chugath NF 1:0:1 St.lla of Alaska OPrtvate ~ Miles 'lJ' 0 0 ·25 0·5 HOR Alalko, Inc. December 2008 Figure 2. The anadromous reach of Falls Creek. The anadromous reach is defined as the section of stream in which anadromous fis~ are documented by the A WC; Johnson and Daigneault 2008). 19 -~ () -3: 0 LL. 120 -,- 100 80 60 40 20 11 Falls Creek -Proposed Hydroelectric Project Reconnaissance Report -Figures Falls Creek Mean Monthly Flows 108 110 56 cfs mean 0 I -+-I -i OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Figure 3. Mean monthly discharge of Falls Creek, modeled using data from USGS gage 15246000 (1947-1958) at Grant Creek, adjusted by monthly ratios developed by Ebasco (APA 1984; using one open water season of flow data. at Falls Creek). Average annual flow (for period of record 1947-1958, from USGS gauge #5246000) is shown as a solid horizontal line (56 cfs). 500 Falls Creek Flow Duration 400 :§' 300 () -3: ~ 200 100 a t-~--~--~--~--~~==~~~==~~ 0 10 20 30 40 50 60 70 80 90 100 % Exceedance Figure 4. Flow duration curve for Falls Creek. Percent exceedence, the value of the x-axis, is the percent of the time flow surpasses the value on the y-axis. This curve was generated using modeled data from USGS gage 15246000 (1947-1958) at Grant Creek, adjusted by monthly ratios developed by Ebasco (APA 1984; using one open water season of flow data. at Falls Creek). 20 200 180 160 140 -Daily Mean -'t:i 120 -Manual Measurements, 2008 -(I) e' 100 tU ..c. 0 (/) 80 i5 60 40 20 0 ,"-. ';:,q,.<:' ,"-~'):J ~'"':> ,t;.. <.:.~ ~1> ~ ~~ Falls Creek Modeled Discharge Pt 5':> '::JVJ."" ';:,.s-~ t;E~ ~v Falls Creek Proposed Hydroelectric Project Reconnaissance Report-Figures • • --,----, ~~ ~ro ~ro ~ C:>Qj~ ov ~0 <::)0J Figure 5. Falls Creek modeled discharge based on data from USGS gauge 15246000 (1947-1958) at Grant Creek, adjusted by monthly ratios developed by Ebasco (AP A 1984) using one open water season of current flow data. Mean discharge is shown by a heavy blue line in cubic feet per second. Manually collected instantaneous stream flow measurements collected in 2008 by HDR Alaska are shown as black dots. 21 Falls Creek -Proposed Hydroelectric Project Reconnaissance Report -Figures LAND STATUS I KPB Parcels ..,.__z F·~__ ..........__ legend Q Poajol-2 c:::J ioo-...- -~~~~-.....-..... -110-~1-4 -120AnidoftlioiC.. -130--H- -131--IIIIpOniJ c::J IIIO-"""""""'IIIdg -3011-- -33&1J1dgo -IUiplo CoMa ---CooniMn:iol --c-.---,llldg -820-----a...v. -~~~~--..,---- -~ a. ... - Piojlal-2 (~--> ; ~ 01 April20011 J.Aa:l«lR~ -AllNt ICPB. GINA. USFS lill Figure 6. Private parcels of Falls Creek area. State and Federal lands are shown by yellow. Private properties are denoted other colors. 22 Falls Creek-Proposed Hydroelectric Project Reconnaissance Report-Figures LAND STATUS Water Rights & Mineral Estate ' PrajectAIU2 F*COBM...,_ --l!oftlugll.- Legend .. State Mining Claim .. Federal Mining Claim • Surface Water Right • Subsurface Water Right GJ Projet Area 2 .. Lake/Pond 2i> lceMass Prqocl -2 (-2,500 ..... ) ~ ~--L.. __ _JMiles 0 0.5 1 o.e: 22 ~ 2008 -t«lR eng;r.mg s.un:.: ADNR , KPB , GINA lil\ Figure 7. Water rights and mineral claims in the Grant Lake area. Federal mining claims are shown by yellow shading. Aqua shading denotes state mining claims. 23 -""'- ~-~~HR \. H'§R Alaska , Inc. ···-~V'' Falls Creek -Proposed Hydroelectric Project Reconnaissance Report -Figures KHL SITE EVALUATION PROJECT OPTION DESCRIPTIONS FALLS CREEK Oato Dec 2008 Figure 8. Proposed project arrangement at Falls Creek for the stand alone option. Location of intake at approximately elevation 800 ft, possible penstock route, powerhouse location and proposed access routes are shown above. 24 Appendix A -Land Status Information 25 PARCELID TAXAREA USEAGE ACREAGE Ll:l.:iAL OWNER ADDREsS T 4N R 1W SEC 13 SEWARD MERIDIAN 12532421 67 -KPB ROAD MAINTENANCE 100 Residential Vacant 6 SW GOVT LOT 8 ALASKA STATE D N R 550 W 7TH AVE STE 650 T 4N R 1W SEC 13 SEWARD MERIDIAN 12532422 67 -KPB ROAD MAINTENANCE 100 Residential Vacant 36 SWGOVTLOT9 ALASKA STATED N R 550 W 7TH AVE STE 650 T 4N R 1W SEC 13 SEWARD MERIDIAN 12532423 67 -KPB ROAD MAINTENANCE 1 00 Residential Vacant 1 SW GOVT LOT 10 ALASKA STATED N R 550 W 7TH AVE STE 650 T 4N R 1W SEC 13 SEWARD MERIDIAN 12532424 67-KPB ROAD MAINTENANCE 131 Mobile Home Imp Only 9 SW GOVT LOT 11 ALASKA STATED N R 550 W 7TH AVE STE 650 T 4N R 1E SEC 3 SEWARD MERIDIAN SW SECTIONS 3 & 4 & 8 THROUGH 17 & 20 THROUGH 26 & 32 & 36 & PORTIONS OF SECTIONS 1 & 2 & 5 EXCLUDING GRANT LAKE & PORTIONS OF SECTIONS 27 & 28 & 29 & 33 & 34 & 35 EXCLUDING PTARMIGAN LAKE & 12532109 67 -KPB ROAD MAINTENANCE 100 Residential Vacant 19,096 PORTIONS OF SECTIONS 30 & 31 E USDA FOREST SERVICE 3301 C ST STE 300 T 4N R 1W SEC 13 SEWARD MERIDIAN SW 0880002 ALASKA STATE LAND 12516007 67 -KPB ROAD MAINTENANCE 1 00 Residential Vacant 1 SURVEY 86-176 LOT 6 ALASKA STATED N R 550 W 7TH AVE STE 650 T 4N R 1W SEC 13 SEWARD MERIDIAN SW 0880002 ALASKA STATE LAND 12516008 67 -KPB ROAD MAINTENANCE 110 Residential Units 1-4 1 SURVEY 86-176 LOT 5 PFLUM TIMOTHY M 19445 POND MEADOW AVE T 4N R 1W SEC 13 SEWARD MERIDIAN SW 0880002 ALASKA STATE LAND 12516009 67 -KPB ROAD MAINTENANCE 110 Residential Units 1-4 1 SURVEY 86-176 LOT 8 BARNETT THOMAS E 3124 MADISON WAY T 4N R 1W SEC 13 SEWARD MERIDIAN SW 0880002 ALASKA STATE LAND 12516010 67 -KPB ROAD MAINTENANCE 1 00 Residential Vacant 1 SURVEY 86-176 LOT 7 ALASKA STATED N R 550 W 7TH AVE STE 650 T 4N R 1W SEC 13 SEWARD MERIDIAN SW 0880002 ALASKA STATE LAND 12516011 67 -KPB ROAD MAINTENANCE 120 Residential Cabin 1 SURVEY 86-176 LOT 10 LYNCH SHAWN M PO BOX24 T 4N R 1W SEC 13 SEWARD MERIDIAN SW 0880002 ALASKA STATE LAND 12516012 67 -KPB ROAD MAINTENANCE 110 Residential Units 1-4 1 SURVEY 86-176 LOT 9 HANLEY JAMES P 3910 W 37TH CT T 4N R 1W SEC 13 SEWARD MERIDIAN SW 0880002 ALASKA STATE LAND 12516013 67-KPB ROAD MAINTENANCE 110 Residential Units 1-4 1 SURVEY 86-176 LOT 12 ROTGABER GEORGE E PO BOX 164 T 4N R 1W SEC 13 SEWARD MERIDIAN SW 0880002 ALASKA STATE LAND 12516014 67 -KPB ROAD MAINTENANCE 1 00 Residential Vacant 1 SURVEY 86-176 LOT 11 ALASKA STATED N R 550 W 7TH AVE STE 650 T 4N R 1W SEC 13 SEWARD MERIDIAN SW 0910009 ALASKA STATE LAND 12516015 67-KPB ROAD MAINTENANCE 1 00 Residential Vacant 0 SURVEY 86-6 TRACT B (ADL 217604) ALASKA STATED N R 550 W 7TH AVE STE 650 T 4N R 1E SEC 18 SEWARD MERIDIAN 12516018 67 -KPB ROAD MAINTENANCE 100 Residential Vacant 10 SW 0000000 US SURVEY 8666 LOT 2 UNITED STATES BLM 222 W 7TH AVE STOP 13 T 4N R 1W SEC 13 SEWARD MERIDIAN 12516019 67 -KPB ROAD MAINTENANCE 100 Residential Vacant 8 SW 0008666 US SURVEY 8666 LOT 1 UNITED STAlES BLM 222 W 7TH AVE STOP 13 T 4N R 1W SEC 13 SEWARD MERIDIAN 12516020 67 -KPB ROAD MAINTENANCE 105 Residential Improved Lam 2 SW 0008666 US SURVEY 8666 LOT 3 UNITED STAlES BLM 222 W 7TH AVE STOP 13 T 4N R 1W SEC 13 & 24 SEWARD MERIDIAN SW US SURVEY 7391 LOT 2 EXCLUDING THAT PTN AS PER ARRC 12514101 67 -KPB ROAD MAINTENANCE 1 00 Residential Vacant 81 6043 ALASKA RAILROAD CORPORAl! ON PO BOX 107500 T 4N R 1W SEC 24 SEWARD MERIDIAN SW USS 7391 THAT PORTION OF LOT 2 12514103 67 -KPB ROAD MAINTENANCE 651 Leased Commercial __ , 0 AS PER ARRC 6509 ALASKA RAILROAD CORPORATION PO BOX 1 07500 ------ 26 CITYSTATE ANCHORAGE, AK 99501 ANCHORAGE, AK 99501 ANCHORAGE, AK 99501 ANCHORAGE, AK 99501 ANCHORAGE, AK 99503 ANCHORAGE, AK 99501 BEND, OR 97702 ANCHORAGE, AK 99508 ANCHORAGE, AK 99501 MOOSE PASS, AK 9963 ANCHORAGE, AK 99517 MOOSE PASS, AK 996:1 ANCHORAGE, AK 99501 ANCHORAGE, AK 99501 ANCHORAGE, AK 99513 ANCHORAGE, AK 99513 ANCHORAGE, AK 9951? ANCHORAGE, AK 99510 ANCHORAGE, AK 99510 Falls Creek-Proposed Hydroelectric Project Reconnaissance Report-Appendix A Land Status LANDVAL IMPVAL ASSESSED TAXABLE PLAT $100,600 $0 $100,600 $0 STATE $312,800 $0 $312,800 $0 STATE $17,600 $0 $17,600 $0 STATE $52,100 $0 $52,100 $0 STATE $11,457,600 $0 $11,457,600 $0 FEDERAL $13,800 $0 $13,800 $0 STATE $13,800 $53,300 $67,100 $67,100 PRIVATE $13,900 $11,800 $25,700 $25,700 PRIVATE $12,700 $0 $12,700 $0 STATE $12,500 $22,900 $35,400 $15,400 PRIVATE $13,600 $62,000 $75,600 $75,600 PRIVATE $12,700 $27,300 $40,000 $40,000 PRIVATE $11,300 $0 $11,300 $0 STATE $8,900 $0 $8,900 $0 STATE $57,700 $0 $57,700 $0 FEDERAL $70,200 $0 $70,200 $0 FEDERAl $48,600 $1,000 $49,600 $0 FEDERAl $252,500 $0 $252,500 $0 STATE $13,000 $8,900 $21,900 $21,900 STATE PARCELID TAXAREA USEAGE ACREAGE LC\:IIU. OWNER T 4N R 1W SEC 13 & 24 SEWARD MERIDIAN SW FALLS CREEK GROUP 12515001 67-KPB ROAD MAINTENANCE 110 Residential Units 1-4 5 US SURVEY 2519 LOT K (HS R1) LINDQUIST GARY V & JULIE R T 4N R 1W SEC 24 SEWARD MERIDIAN SW 0000000 FALLS CREEK GROUP U S 12515002 67 -KPB ROAD MAINTENANCE 11 0 Residential Units 1-4 5 SURVEY 2519 LOT J (HS 38) MERRITT WILLIAM T JR & JUDY L T 4N R 1W SEC 24 SEWARD MERIDIAN SW 0002519 FALLS CREEK GROUP OF HOMESITE-USS 2519 LOT I THAT PORTION BEGINNING AT THE NORTHEAST CORNER OF LOT I PROCEED WEST 361.68 FT TH SOUTHERLY ALONG THE EAST BANK OF TRAIL RIVER 78 FT TO THE BANK OF 12515006 67 -KPB ROAD MAINTENANCE 11 0 Residential Units 1-4 1 A SLOUGH TH VIT ARIS CLIFFORD R & KATHLEEN A T 4N R 1W SEC 13 SEWARD MERIDIAN SW 0880002 ALASKA STATE LAND 12516003 67 -KPB ROAD MAINTENANCE 120 Residential Cabin 1 SURVEY 86-176 LOT 2 BARTOLINI TONY T 4N R 1W SEC 13 SEWARD MERIDIAN SW 0880002 ALASKA STATE LAND 12516004 67-KPB ROAD MAINTENANCE 120 Residential Cabin 1 SURVEY 86-176 LOT 1 KROMREY MARK T & KAREN L T 4N R 1W SEC 13 SEWARD MERIDIAN SW 0880002 ALASKA STATE LAND 12516005 67 -KPB ROAD MAINTENANCE 1 00 Residential Vacant 1 SURVEY 86-176 LOT 4 ALASKA STATED N R T 4N R 1W SEC 13 SEWARD MERIDIAN SW 0880002 ALASKA STATE LAND 12516006 67 -KPB ROAD MAINTENANCE 120 Residential Cabin 1 SURVEY 86-176 LOT 3 CARTER LARRY JAMES (JIM) LIVING TRUST T 4N R 1W SEC 13 SEWARD MERIDIAN SW 0880002 ALASKA STATE LAND SURVEY 86-176 TRACT A EXCEPT ASLS 12516022 67-KPB ROAD MAINTENANCE 100 Residential Vacant 37 86-6 ALASKA STATED N R T 4N R 1W SEC 13 SEWARD MERIDIAN SW 0880002 ALASKA STATE LAND 12516023 67 -KPB ROAD MAINTENANCE 100 Residential Vacant 45 SURVEY 86-176 LOT 1-A ALASKA STATED N R T 4N R 1 E SEC 7 SEWARD MERIDIAN SW GOVT LOTS 1 THRU 7 & E1/2 & 12532102 67 -KPB ROAD MAINTENANCE 1 00 Residential Vacant 560 NE1/4 NW1/4 ALASKA STATED N R T 4N R 1E SEC 18 SEWARD MERIDIAN SW GOVT LOTS 1 THRU 5 & E1/2 & E112 12532103 67 -KPB ROAD MAINTENANCE 100 Residential Vacant 544 NW1/4 & NE1/4 SW1/4 ALASKA STATED N R T 4N R 1E SEC 19 SEWARD MERIDIAN SW GOVT LOTS 1 THRU 4 & E1/2 & E1/2 12532104 67 -KPB ROAD MAINTENANCE 100 Residential Vacant 605 W1/2 ALASKA STATED N R T 4N R 1W SEC 24 SEWARD MERIDIAN 12532401 67 -KPB ROAD MAINTENANCE 1 00 Residential Vacant 43 SWGOVT LOT 1 ALASKA STATED N R 27 ADDRESS ci1YSTATE 31087 SEWARD HWY SEWARD, AK 99664 POBOX 172 MOOSE PASS, AK 9963 30919 SEWARD HWY SEWARD, AK 99664 8901 E RAVENDALE DR PALMER, AK 99645 PO BOX68 MOOSE PASS, AK 9963 550 W 7TH AVE STE 650 ANCHORAGE, AK 99501 3804 ARKANSAS DR ANCHORAGE, AK 99517 550 W 7TH AVE STE 650 ANCHORAGE. AK 99501 550 W 7TH AVE STE 650 ANCHORAGE, AK 99501 550 W 7TH AVE STE 650 ANCHORAGE, AK 99501 550 W 7TH AVE STE 650 ANCHORAGE, AK 99501 550 W 7TH AVE STE 650 ANCHORAGE, AK 99501 550 W 7TH AVE STE 650 ANCHORAGE, AK 99501 Falls Creek-Proposed Hydroelectric Project Reconnaissance Report -Appendix A -Land Status LANDVAL IMPVAL ASS!:SSED TAXABLE PLAT $54,400 $188,700 $243,100 $223,100 PRIVATE $39,100 $110,300 $149,400 $129,400 PRIVATE $20,300 $108,200 $128,500 $108,500 PRIVATE $17,400 $16,200 $33,600 $33,600 PRIVATE $17,400 $22,800 $40,200 $40,200 PRIVATE $17,000 $0 $17,000 $0 STATE $17,600 $1,000 $18,600 $18,600 PRIVATE $277,600 $0 $277,600 $0 STATE $233,800 $0 $233,800 $0 STATE $423,100 $0 $423,100 $0 STATE $411,200 $0 $411,200 $0 STATE $296,500 $0 $296,500 $0 STATE $35,600 $0 $35,600 $0 STATE PARCEL ID TAXAREA USEAGE ACREAGE LEGAL AK932 EW 21 S 4N 1E 9 SE AKAA 055112 21 S4N1E21NE AKAA 076796 7 S4N 1W24 NE AKAA 030237 22 S4N 1E21 NE AKAA 076794 21 S4N1E16NW AKAA 055109 21 S 4N 1E 16 SE AKAA 055111 21 S 4N 1E 21 NE AKAA 076795 4 S4N 1W 13 SW AKAA 030239 21 S4N 1E 17 SW AKAA 087532 21 S4N 1E 16SE AKAA 055107 21 S 4N 1E 21 NE AKAA 031337 21 S4N1E16NW AKAA 055110 21 S 4N 1E 16 SW AKAA 055113 21 S 4N 1E 16 SE AKAA 055108 21 S4N 1E 16 AKAA 055114 OWNER ADDRESS CITYSTATE LANDVAL ------ 28 IMPVAL ASSESSED Falls Creek Proposed Hydroelectric Project Reconnaissance Report -Appendix A -Land Status TAXABLE PlAT! Appendix B -Energy Calculations 29 Falls Creek Alaska POWER GENERATION DATA FILE USED: FALLS.QCH MODEL DESCRIPTION PIPE # LENGTH DIAMETER MANNING'S n MINOR LOSSES 1 5000 40 .011 2 HEADWATER ELEV: 800 TAILWATER ELEV: 500 GROSS HEAD: 300 NET HEAD@ FULL LOAD: 245.2 NAMEPLATE CAPACITY (kW): 1831.6@ 1 POWER FACTOR STATION SERVICE LOSS: 1 TRANSFORMER LOSS: 1 TRANSMISSION LOSS: 1 SCHEDULED DOWN TIME: 1 TURBINE SELECTED: 1 -TURGO-GENERAL GENERATOR SELECTED: GE 30 Falls Creek Proposed Hydroelectric Project Reconnaissance Report -Appendix B-Energy Calculations MINIMUM INSTREAM FLOWS OCT NOV DEC JAN FEB MAR APR Falls Creek-Proposed Hydroelectric Project Reconnaissance Report -Appendix B -Energy Calculations MAY JUN JUL AUG SEP ------------------------------------------------------------------------------------------------ 0 0 0 0 0 0 0 0 0 0 0 0 SIMULATED PRODUCTION IN MEGAWATT-HOURS YEAR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP TOTAL --------------------------------- 1948 197.8 0.0 0.0 0.0 0.0 0.0 0.0 142.7 1224.7 1297.2 799.4 275.5 3937.2 1949 174.8 0.0 0.0 0.0 0.0 0.0 0.0 79.3 1156.6 1236.9 680.9 790.5 4119.1 1950 110.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1054.0 1275.2 976.5 630.3 4046.2 1951 8.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1022.7 1245.6 788.0 919.2 3983.9 1952 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1019.6 1287.6 885.7 496.0 3688.9 1953 282.1 0.0 0.0 0.0 0.0 0.0 0.0 153.6 1266.0 1308.2 996.4 542.4 4548.7 1954 167.3 0.0 0.0 0.0 0.0 0.0 0.0 60.2 1189.6 1168.4 795.1 368.0 3748.5 1955 70.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 889.8 1301.1 815.2 482.1 3558.4 1956 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 870.1 1235.1 927.7 393.3 3426.2 1957 0.0 0.0 0.0 0.0 0.0 0.0 0.0 68.8 1188.3 1040.3 774.2 845.0 3916.5 1958 126.8 0.0 0.0 0.0 0.0 0.0 0.0 36.7 1245.1 1209.6 848.5 269.6 3736.3 AVERAGE 103.4 0.0 0.0 0.0 0.0 0.0 0.0 49.2 1102.4 1236.8 844.3 546.5 3882.7 AVERAGE PLANT FACTOR: 0.24 AVG. # DAYS/YEAR SHUTDOWN DUE TO LOW WATER: 223 31 THIS SIMULATION USED THE FOLLOWING EQUIPMENT EFFICIENCIES % LOAD TURBINE GENERATOR COMBINED -------- 0 0.0 0.0 0.0 10 70.1 92.8 65.0 20 79.4 94.9 75.4 30 83.7 96.3 80.6 40 84.9 97.0 82.3 50 85.9 97.3 83.5 60 86.0 97.5 83.9 70 86.0 97.7 84.0 80 86.0 97.7 84.0 90 86.0 97.7 84.1 100 86.0 97.7 84.0 32 Falls Creek Proposed Hydroelectric Project Reconnaissance Report -Appendix B -Energy Calculations Appendix C -Cost Information 33 Item I 330 331 .t 332 .1 .2 .3 .4 .5 .1 .2 Falls Creek-Proposed Hydroelectric Project Reconnaissance Report -Appendix C-Cost Information FALLS CREEK OPINION OF PROBABLE COST Alternative 1 -Run of River I I Quanti~ I Unit I Unit Cost I Amount LAND AND LAND RIGHTS .1 Land Rights -Generation Plant LS $ 50,000 $ 50,000 .2 Special use permits LS $ 50,000 $ 50,000 .3 Surveying LS $ 100.000 $ 100.000 STRUCTURES AND IMPROVEMENTS POWERHOUSE $ .1 Excavation 1000 CY $ 150 $ 150,000 .2 Concrete (incl. reinforcement) 210 CY $ 1.200 $ 252,000 .3 Metal Building 2500 SF $ 150 $ 375,000 .4 Misc. Metals LS $ 50,000 $ 50,000 .5 HVAC. Plumbing & Electrical LS $ 50,000 $ 50,000 .6 Grounding Grid LS $ 25,000 $ 25,000 . 7 Fire Protection LS $ 25,000 $ 25.000 RESERVOIRS, DAMS AND WATERWAYS SITE WORK $ .1 Clearing/Drainage/Erosion Control LS $ 50,000 $ 50.000 DAM AND SPILLWAY $ .1 Excavation 400 CY $ 150 $ 60,000 .2 Care of Water/Diversion 1 LS $ 100,000 $ 100,000 .3 Concrete (structural) CY $ 1,200 $ .4 Concrete (mass) 400 CY $ 1,000 $ 400.000 INTAKE $ .1 Excavation 375 CY $ 150 $ 56,250 .2 Care of Water/Diversion 0 LS $ 100,000 $ .3 Trash racks 1 LS $ 50.000 $ 50,000 .4 Control GatesNalve w/operator 1 LS $ 150,000 $ 150,000 .5 Concrete (structural) 100 CY $ 1,200 $ 120,000 .6 Concrete (mass) 0 CY $ 1,000 $ . 7 Misc. Metals LS $ 25,000 $ 25.000 SLUICEWAY $ .1 Excavation 300 CY $ 150 $ 45,000 .2 Care of Water/Diversion 0 LS $ 100.000 $ .3 Sluice Gate w/operator 1 LS $ 100,000 $ 100,000 .4 Concrete (structural) 100 CY $ 1,200 $ 120,000 WATER CONDUCTORS AND ACCESSORIES PENSTOCK $ .a Clearing 11 ACRE $ 25,000 $ 286,961 .b Steel penstock material 5000 LF $ 130 $ 650,000 .c Concrete (thrust blocks and supports) 200 CY $ 1.200 $ 240,000 .d Penstock installation 5000 LF $ 150 $ 750,000 .e Slope stabilization 0.5 Ml $ 250,000 $ 125,000 TAILRACE .a Excavation LS $ 25,000 $ 25,000 .b Support and lining LS $ 25,000 $ 25.000 34 333 .1 .2 334 .1 .2 .3 .4 .5 335 .1 .2 336 .1 .2 .3 350 .1 352 .1 .2 .3 353 .1 .2 356 .1 Falls Creek-Proposed Hydroelectric Project Reconnaissance Report -Appendix C-Cost Information WATERWHEELS, TURBINES AND GENERATORS Supply LS $ 810.000 $ 810.000 Install LS $ 500.000 $ 500,000 ACCESSORY ELECTRICAL EQUIPMENT Switchgear LS $ 150,000 $ 150,000 Station Service LS $ 150.000 $ 150,000 Control Panel LS $ 250.000 $ 250,000 Conduit/wires/cables LS $ 150.000 $ 150,000 Power to intake LS $ 75.000 $ 75,000 MISC. POWER PLANT EQUIPMENT Cooling Water System LS $ 25,000 $ 25.000 Powerhouse crane LS $ 250,000 $ 250,000 ROADS, RAILROADS AND BRIDGES Existing road to Powerhouse and Intake 0.50 Ml $ 200.000 $ 100,000 Existing road upgrades 1.50 Ml $ 100.000 $ 150,000 Clearing/Drainage/Erosion Control LS $ 100.000 $ 100.000 LAND AND LAND RIGHTS Land rights -transmission line LS $ 10,000 $ 10,000 STRUCTURES AND IMPROVEMENTS (TRANSMISSION FACILITY) Substation foundations LS $ 50.000. $ 50,000 Oil spill containment LS $ 25,000 $ 25,000 Grounding grid LS $ 10,000 $ 10,000 STATION EQUIPMENT Main transformer LS $ 75.000 $ 75,000 Accessory switchgear equipment LS $ 350.000 $ 350,000 OVERHEAD CONDUCTORS & DEVICES New pole line 0.50 Ml $ 750.000 $ 375.000 Total Direct Construction Costs $ 8.200,000 Design Engineering 10% $ 820.000 FERC and other licensing $ 1.000,000 Owner's General Administration & overhead 5% $ 410.000 Construction Management 5% $ 410,000 Subtotal $ 10,840,000 Contingency 30% $ 3.252.000 Interest during construction 7% $ 3.172.000 2008 Estimated Project Cost $ 17.270.000 Annual Energy. MWh 3.800 Debt Service $ 1.254.647 O&M $ 458.400 2008 Cost of Energy, $/kWh $ 0.451 35 Dam Type Crest Length Max height Crest width Section A 8 c Excavation Width Depth Volume Box Intake Length Width Height Thickness. avg Concrete volumes Floor Walls Total Excavation Sluiceway Length Width Height Thickness. avg Concrete volumes Floor Walls Excavation Falls Creek Proposed Hydroelectric Project Reconnaissance Report -Appendix C Cost Iriformation Simple concrete gravity 100ft 1300 15ft 2 length height area. sf vol. cy 50% 100% 143 264 25% 80% 96 89 25% 50% 43 40 393 45 2 333 cy 30 15 15 1.5 25 cy 75 100 cy 375 cy 30 10 18 2 17 cy 70 87 300 cy 36 PENSTOCK Head Flow Vel , max Dia , req t , req t , handling t , min wt, ft area Cost Material Lin i ng Coati ng Supports Span Length # W idth , 2d Depth , .5d Height, .5d Vol Th r ust Blocks # Width , 2d Depth ,2d Height, 2d Vol Tota l Falls Creek-Proposed Hydroelectric Project Reconnaissance Report -Appendix C-Cost Information 300ft 105 cfs 12 fps 40.1 inches 0.1447 0.1502 0 .1 502 59 .1 lbs 10 .5 $ 1 .50 l b $ 88 .59 $ 1.50 sf $ 15.73 $ 1.50 sf $ 15.73 $ 120.06 60ft 5000 83 6 .6772739 1.6693185 1.6693185 57.429176 8.3 6 .6772739 6 .6772739 6 .6772739 91 .886682 149.31586 37 Falls Creek-Proposed Hydroelectric Project Reconnaissance Report -Appendix C Cost Information POWERHOUSE Powerhouse structure Prefabricated Metal Building $150/sf) Length Width Thickness Discharge chamber Length Width Depth Thickness. avg Concrete Volumes Foundation Floor Prefab building cost 38 150 50 50 2 15 8 5 2 17.0 185.2 202.2222 375000 Excavation 1000 Appendix D -Project Photographs 39 Falls Creek -Proposed Hydroelectric Project Reconnaissance Report -Appendix D -Project Photographs Looking upstream at one of potential intake sites at Falls Creek. 40 Falls Creek -Proposed Hydroelectric Project Reconnaissance Report -Appendix D -Project Photographs Second potential intake at Falls Creek. Proposed penstock would exit on the left hand side of this photograph. Aerial view of Falls Creek area. 41