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Home My WebLink AboutConcept Design Report and Construction Cost Estimate for Energy Infrastructure Projects Elfin Cove 2006CONCEPT DESIGN REPORT AND CONSTRUCTION COST ESTIMATE FOR ENERGY INFRASTRUCTURE PROJECTS IN THE COMMUNITY OF: ELFIN COVE PREPARED FOR: STATE OF ALASKA ALASKA ENERGY AUTHORITYI RURAL ENERGY GROUP PREPARED BY: Alaska Energy and Engineering, Inc. Mailing Adoress -P.O. Box 111405 Anchorage, AK 99511-1405 (907) 349-0100 349-8001 FAX FEBRUARY 16, 2006 Elfin Cove Energy Infrastructure Projects Concept Design Report EXECUTIVE SUMMARY February 16, 2006 Alaska Energy and Engineering This report has been prepared by Alaska Energy and Engineering, Inc. (AE&E) for the Alaska Energy Authority/Rural Energy Group (AEAlREG). The purpose of this study is to provide a concept design and construction cost estimate for the following potential energy infrastructure improvement projects for the community of Elfin Cove: • Diesel power plant renovation. • Minor upgrades to existing bulk fuel storage and handling facilities. • Generation heat recovery system upgrades. • Community power distribution improvements. • . Hydroelectric generation facility and transmission cable. Participants in the project .include the Community of Elfin Cove Nonprofit Corporation (Community Association) and the Elfin Cove Electric Utility (Electric Utility). A site investigation was performed by David Lockard of the Alaska Energy Authority/Rural Energy Group (AEAlREG) and John Dickerson of Alaska Energy & Engineering, Inc. (AE&E) on Wednesday April 13, 2005. The purpose of the site visit was to meet with local residents to identify and discuss potential energy infrastructure projects within the community as well as to gather reconnaissance level information for preparation of a Conceptual Design Report (CDR) for any identified projects. The existing power plant and electrical distribution system was constructed in the mid 1980's. The power plant is centrally located in the town site, co-located on a parcel with the community building. The power plant building will need to be modified in order to meet IBC fire separation requirements to other buildings and property lines. The power generation and heat recovery equipment in is in poor condition and in need of replacement. The proposed power plant renovation will include three new generators (364kW total), programmable automatic paralleling switchgear, remote radiators with variable speed control, a fire suppression system, critical grade exhaust silencers, an automatic fill day tank, a heat exchanger for generation heat recovery, and all required engine coolant piping and ventilation equipment. The existing community tank farm was constructed new in 2000 and is in excellent condition. There are some minor code-compliance issues that need to be addressed including security fencing, warning signs, and electrical system revisions. Proposed fuel distribution pipeline work includes new paint and supports on the existing fuel dock pipelines as well as a new 2" welded steel pipeline to supply the power plant automatic fill day tank. Proposed community heat recovery system upgrades include new heat recovery equipment for the community building and shop building hydronic heating systems. Proposed community power distribution upgrades include one new residential secondary service transformer for two planned new homes, upgrades to the harbor electrical distribution and metering system as well as a prepaid electric meter for the community dry-dock boat grid. The proposed hydroelectric generation facility would be located approximately one and one quarter miles southeast of the community of Elfin Cove. The hydroelectric facility would include: a diversion structure on Crooked Creek; an approximately 1,000 foot long diversion conduit from Crooked Creek to Jim's Elfin Cove Energy Infrastructure Projects February 16, 2006 Concept Design Report Alaska Energy and Engineering Lake, an approximately 1,300 foot long penstock from Jim's Lake to tidewater; a hydro power house with turgo type turbine and programmable automatic paralleling switchgear at tidewater; an approximately 9,000 foot long on-ground transmission line to the renovated diesel power plant; fiber optic communication cable between the hydroelectric powerhouse and the townsite diesel power plant; and access trails to the power house and diversion structure. For scheduling and cost estimate purposes all power plant, tank farm, fuel pipeline, heat recovery and power distribution work is combined into a single "Power System Upgrades" project. The proposed project schedule calls for design and permitting to be completed by November 2006, for construction from February through April 2007, with the renovated power plant fully functional by May 2007. The proposed hydroelectric facility and transmission line scheduling and cost estimate is included as the "Hydroelectric Facility and Transmission Line" project. The proposed project schedule calls for design and permitting to be completed by August 2007, for construction from March through July 2008, with the hydroelectric facility fully functional by August 2008. Separate cost estimates have been prepared for the Power System Upgrade (includ.ing power plant, tank farm, fuel pipeline, power distribution and heat recovery upgrades) and the Crooked Creek/Jim's Lake Hydroelectric Project. The estimated total project cost including all design, supervision, inspection, permitting, and a 15% contingency for each component is: • $1,016,185 Power System Upgrades • $1,495,115 Crooked Creek/Jim's Lake Hydroelectric Project The total installed generation capacity of the renovated diesel power plant is 364kW. The unit cost of the Power Plant Upgrade is $2,792/kW which is below the Denali Commission benchmark cost range of $3,500 to $2,900 per installed kW for 201 W to 400kW capacity power plants. It is assumed that the operation and maintenance costs of the hydroelectric plant will be comparable to that of the diesel generators. Therefore, the hydroelectric project cost of $1,495,115 needs to be compared to the primary benefit which is the avoided fuel cost. It is estimated that the hydroelectric generator would offset approximately 25,600 gallons of diesel fuel per year. Using the average fuel price paid by the electric utility in 2005 of $2.52/gallon this equates to an annual savings of $64,500. ii Elfin Cove Energy Infrastructure Projects Concept Design Report INDEX February 16, 2006 Alaska Energy and Engineering Executive Summary ............................................................................................. Page i Index ................................................................................................................. Page iii Acronyms and Abbreviations ............................................................................... Page v 1.0 Introduction ................................................................................................... Page 1 1.1 Program Overview ................................................................................. Page 1 1.2 Community Description ......................................................................... Page 2 1.3 Site Investigation ................................................ : ................................... Page 2 1.4 Code Analysis & Deficiencies ................................................................ Page 3 2.0 Existing Facilities ........................................................................................... Page 4 2.1 Power Plant ........................................................................................... Page 4 2.2 Power Distribution .................................................................................. Page 5 2.3 Heat Recovery System .......................................................................... Page 5 2.4 Fuel Storage .......................................................................................... Page 6 3.0 Community Power Demand .......................................................................... Page 6 3.1 Estimated Future Load Growth .............................................................. Page 7 3.2 Alternative Energy/Efficiency Improvements .......................................... Page 7 4.0 Proposed Energy Infrastructure Project Descriptions ................................... Page 8 4.1 Power Plant Renovation ........................................................................ Page 9 4.2 Power Distribution Upgrades ............................................................... Page 11 4.3 Heat Recovery System Upgrades ........................................................ Page 11 4.4 Tank Farm Upgrades ........................................................................... Page 11 4.5 Crooked Creek/Jim's Lake Hydroelectric Project ................................. Page 12 5.0 Site Selection & ControL ............................................................................. Page 14 5.1 Power Plant Site .................................................................................. Page 14 5.2 IBC Fire Separation Requirements ...................................................... Page 15 5.3 Power Plant Fuel Pipeline Route ......................................................... Page 16 5.4 Tank Farm Site .................................................................................... Page 16 5.5 Fuel Dock Site ...................................................................................... Page 16 5.6 Harbor Site ........................................................................................... Page 16 5.7 Community Dry-Dock Grid Site ............................................................ Page 16 5.8 Hydroelectric Project Site ..................................................................... Page 16 5.9 Hydroelectric Transmission Cable Route ............................................. Page 16 5.10 Site Control ......................................................................................... Page 17 iii Elfin Cove Energy Infrastructure Projects Concept Design Report February 16, 2006 Alaska Energy and Engineering 6.0 Permitting and Spill Response ................................................................... Page 17 6.1 Environmental Assessment ................................................................. Page 17 6.2 Fire Code ............................................................................................. Page 18 6.3 Spill Response ..................................................................................... Page 18 6.4 Hydroelectric Project Permitting ........................................................... Page 18 7.0 Construction Plan ....................................................................................... Page 18 7.1 Local Job Skills .................................................................................... Page 19 7.2 Local Equipment .................................................................................. Page 19 7.3 Material Sources .................................................................................. Page 19 8.0 Schedule ....................................................................... ' ............................. Page 20 8.1 Power System Upgrades Schedule .................................................... Page 20 8.2 Hydroelectric Project Schedule ............................................................ Page 20 9.0 Cost Estimate ............................................................................................. Page 21 Concept Design Drawings ................................................................ , .............. Appendix A Construction Cost Estimate ............................................................................. Appendix B Site Control Documents ................................................................................. Appendix C Electrical Data ................................................................................................. Appendix D Description of Hydroelectric Project ......... , ...................................................... Appendix E Meeting Summary Letters ............................................................................... Appendix F iv Elfin Cove Energy Infrastructure Projects Concept Desig n Report February 16, 2006 Alaska Energy and Engineering ADCCED ADEC AEAlREG AIDEA API ANTHC BFU CDR COE DC DOT EPA F GPM HUD IBC ICDBG IFC MLLW NEC NFPA NFS RPSU SHPO SPCC USCG USCOE USS ACRONYMS AND ABBREVIATIONS AK Department of Commerce, Community al)d Econ. Development Alaska Department of Environmental Conservation Alaska Energy Authority/Rural Energy Group Alaska Industrial Development and Export Authority American Petroleum Institute Alaska Native Tribal Health Consortium Bulk Fuel Upgrade Conceptual Design Report U. S. Army Corps of Engineers Denali Commission (Alaska) Department of Transportation and Public Facilities U.S. Environmental Protection Agency Degrees Fahrenheit Gallons Per Minute Housing and Urban Development International Building Code Indian Community Development Block Grant International Fire Code Mean Lower Low Water National Electric Code National Fire Prevention Association Non-frost susceptible Rural Power System Upgrade State Historic Preservation office Spill Prevention Control and Countermeasures United States Coast Guard United States Army Corps of Engineers United States Survey v Elfin Cove Energy Infrastructure Projects Concept Design Report 1.0 INTRODUCTION February 16, 2006 Alaska Energy and Engineering This report has been prepared by Alaska Energy and Engineering, Inc. (AE&E) for the Alaska Energy Authority / Rural Energy Group (AENREG). The purpose of this study is to provide a concept design and construction cost estimate for the following potential energy infrastructure improvement projects for the Community of Elfin Cove: • Diesel power plant renovation. • Minor upgrades to existing bulk fuel storage and handling facilities. • Generation heat recovery system upgrades. • Community power distribution improvements. • Hydroelectric generation facility and transmission cable. Participants in the project include the Community of Elfin Cove Nonprofit Corporation (Community Association) and the Elfin Cove Electric Utility (Electric Utility). 1.1 Program Overview The Alaska Energy Authority (AEA), Rural Energy Group is pursuing grant funds to upgrade rural bulk fuel tank farms and electric power systems. All project components are dependent on available funding. Following is a brief outline of the program: • Most of the funds are federal and provided through the Denali Commission (DC). Other federal funding may be available from HUD (ICDBG) and the Environmental Protection Agency (EPA). Additional funds may be available from the State of Alaska, USDA, and loan financing. • In order to receive grant funds, each community must demonstrate that the proposed facility will be sustainable by accepting a business plan. The business plan shall describe who will own the facility, and how it will be operated, maintained and replaced. • New energy projects are funded, designed, and constructed in three phases: Phase 1, Conceptual Design; Phase 2, Design Completion; and Phase 3, Construction. • During Phase 1, Conceptual Design, staff from AEA will visit a community, discuss the program, and work with residents and the local government to select sites for the new facilities. • At the completion of Phase 1 Conceptual Design, the community will be requested to review and approve the location, capacity, and basic configuration of the facilities as well as a draft business plan. • During Phase 2, Design Completion, the design for the new energy projects will be completed. An environmental assessment will be prepared and site control documented. A business plan will be prepared for signing. • Each community will be requested to provide "in kind" contributions· as available. 1 Elfin Cove Energy Infrastructure Projects Concept Design Report February 16, 2006 Alaska Energy and Engineering • Project may include local hire and construction trade training programs, subject to Denali Commission funding. • If the Denali Commission approves the business plan it will be circulated for signature and construction procurement will start. • Ineligible Projects: Funding is not available through AEA for buildings, propane facilities, fuel tank trucks or trailers, fuel to fill the tank farm, operation & maintenance costs, or residential tank upgrades. Loans for fuel tank trucks and trailers may be available through USDA. • Training Available: AEA has several training programs available for communities. 1.2 Community Description Elfin Cove is located on the northern shore of Chichagof 1~land, 70 air miles west of Juneau and 33 air miles west of Hoonah. It lies at approximately 58.194° North Latitude and 136.343° West Longitude (Sec. 25, T042S, R055E, Copper River Meridian.) The area encompasses 10.7 square miles of land and 0.1 square miles of water. Elfin Cove has a maritime climate with cool summers and mild winters. Summer temperatures range from 52 to 63; winters 26 to 39. The highest recorded temperature is 85, and the lowest recorded temperature is minus 10F. Total precipitation averages 102 inches a year, with 96 inches of snow. The population was estimated at 26 residents in 2004. Elfin Cove is a community association and is not a federally recognized native village. The community is located in the Sitka Recording District and the Chatham School District (CSD). The local school is no longer open and has been converted to a community building. 1.3 Site Investigation On Wednesday April 13, 2005, David Lockard of the Alaska Energy Authority I Rural Energy Group (AEAlREG) and John Dickerson of Alaska Energy and Engineering (AE&E) traveled to Elfin Cove. The purpose of the site visit was to meet with local residents to identify and discuss potential energy infrastructure projects within the community as well as to gather reconnaissance level information. Mr. Lockard and Mr. Dickerson arrived in Elfin Cove by float plane around noon and proceeded directly to the community building where they met with power plant operator Jim Lewis and tank farm operator Jim Wild. After a tour of the power plant and fuel facilities, a town meeting was held at 4:45 P.M. The meeting was attended by ten local residents including Community Association Vice Chairperson Mary Jo Lord-Wild. Prior to the field investigations, available information was obtained and analyzed, including aerial photographs, community profile, survey plats, PCE data, Corps of Engineers wetlands and flood information, and other relevant data. During the initial field investigation, Elfin Cove Electric Utility electrical distribution system drawings and power generation operator logs were obtained. Additional information and input was obtained from the following individuals: 2 Elfin Cove Energy Infrastructure Projects Concept Design Report February 16, 2006 Alaska Energy and Engineering • Mr. Gordy Wrobel, Chairman, Community Association • Ms. Mary Jo Lord-Wild, Vice-Chairman, Community Association 239-2221 239-2222 239-2252 239-2218 239-2222 • Mr. Hap Leon, resident • Ms. Jane Button, Bookkeeper, Electric Utility • Mr. Jim Wild, Tank Farm Operator, Community Association • Mr. Jim Lewis, Power Plant Operator, Electric Utility • Mr. Raymond O'Neil, VSW Primary Project Engineer • Mr. J.W. Bean, Professional Land Surveyor, Juneau • Mr. Brian Olsen, Delta Western Fuel, Juneau • Ms. Marcy Johnson, Channel Construction, Juneau • Mr. Doug Trucano, Trucano Construction, Juneau • Alaska Marine Lines, Seattle 1.4 Code Analysis & Deficiencies nfa 269-7603 789-0590 586-8000 789-0200 586-2444 (206) 764-8346 The following is a summary of existing power plant, electric distribution, and fuel system code analysis and deficiencies observed during the site investigations. Power Plant: • The existing power plant building does not meet IBC required fire separation distances from other buildings and property lines. • Antiquated f inefficient diesel gensets -expensive to maintain and operate. • Older automatic paralleling switchgear that does not respond properly to current community demand profile. Distribution System: • Inadequate secondary service capacity for area of proposed new residential construction. • Inadequate service capacity and number of pedestals at small boat harbor. Fuel Tank System: A new bulk fuel facility was constructed in Elfin Cove in 2000. The following is a summary of deficiencies observed at the new facility during the April 13, 2005 site visit: • Missing Signage -Required signage missing, including emergency switch and DEC spill information signs. • Improper Fencing -Fencing does not completely enclose the tank farm and portions of the existing fencing are less than six feet high. • Improper Tank Labeling -Tanks are required to be labeled with product and capacity. • NEC Violations -Required conduit seal-offs at area classification zone boundaries are missing. • Improper Fill Indication-The dispensing tanks lack an audible alarm (whistle vent) or 85% mark on the liquid level gauge as required by Fire Code. 3 Elfin Cove Energy Infrastructure Projects Concept Design Report February 16, 2006 Alaska Energy and Engineering • Improper Piping and Valves -Isolated sections of piping with no pressure relief. The concept design for all energy infrastructure projects have been prepared to meet current code and regulatory requirements, which include: • The 2003 Edition of the International Building Code (IBC). • The 2003 Edition of the International Fire Code (lFC) and currently adopted Alaska State Fire Marshal Fire and Safety Regulations. • The 2002 Edition of the National Electrical Code (NEC). • The 2002 Edition of the National Electrical Safety Code (NESC). • 40 CFR, Part 112.1-12, U.S. Environmental Protection Agency Spill Prevention Requirements • 33 CFR, Part 154.30 & 154.1030, U.S. Coast Guard Spill Prevention Requirements 2.0 EXISTING FACILITIES The existing community energy infrastructure was evaluated to determine specific needs and deficiencies. The power plant, distribution system, heat recovery system and fuel storage were visually examined to determine suitability for re-use. The following paragraphs summarize findings for the community. 2.1 Power Plant The existing power plant building was constructed in the mid 1980's. It is located in the center of town, adjacent to the community building and near several lodges and residences. The building consists of an original 16'Wx26'L section with a newer 6'Wx14'L entry/storage addition. The back, both sides and a portion of the front wall of the original structure are constructed of pre-formed concrete panels. A portion of the front wall as we" as the new storage room/entry are wood frame constructed. Roof construction is with wooden trusses and metal roofing. The building rests on a slab-on-grade foundation. The noise level in the area of the power plant has been an area of concern due to the close proximity of the community building, lodges and private residences. The pre-formed concrete walls are excellent for sound absorption but the existing exterior mounted exhaust silencers and open wall penetrations reduce the potential for overall building sound attenuation. The existing building ventilation system is inadequate, with only a single exhaust fan and no ventilation air intake ducting. The lack of ventilation makes it necessary to leave the door open in warm weather which increases the noise in the area. There are three generators in the existing power plant, one rated at 60kW, one at 205kW and the third at 195kW (installed used summer 2005 by community, provided by AEAlREG). The 205kW and 60kW units are high hour antiquated units near the end of their useful lives. Engine cooling is with two remote radiators located outside on the south side of the power plant. All three generators are on a common cooling manifold with the other two radiators and a she" & tube heat exchanger that provides recovered heat to the nearby community building and shop. All of the existing engine 4 Elfin Cove Energy Infrastructure Projects Concept Design Report February 16. 2006 Alaska Energy and Engineering cooling and heat recovery equipment appears to be original equipment and is near the end of its useful life. 2.2 Power Distribution Power generation is at 480V 3-phase. The existing automatic paralleling switchgear includes a section for each of the three generators and a community feeder/station service section. The switchgear was originally provided by NC Equipment in the mid 1980's and is due for replacement. A pad-mount 150kVA, three-phase, 480V to 7.2/12.47kV step-up transformer is located adjacent to the power plant. The distribution system is approximately twenty years old and is in good overall condition. It is sectionalized at the power plant step-up transformer bank with cable routed throughout the community in conduit underneath the boardwalks. There is only one three-phase distribution section. which runs to the community store (Lot 9). All other distribution is single phase. An approximately one mile long single phase extension delivers power around the perimeter of Elfin Cove. At the end of the developed townsite boardwalk area this extension converts to armored cable placed on top of the ground which continues around the cove. It then converts to a short section of overhead distribution on the western shore of Elfin Cove where it provides service to several lodges and residences. New housing construction is planned on the north side of town. an area currently served by only a single 1 OkVA secondary service transformer. The small boat harbor is under-served with power. with only six electric meters located on the main float to serve the entire harbor. This situation forces the use of long extension cords strung out on the finger floats to serve vessels located off the main float, with resulting safety issues and low voltage problems. There is a community small boat dry-dock grid in Elfin Cove where local vessels can go dry for bottom work and maintenance. There is currently no power source available in the grid area. A local resident has allowed boat owners to run extension cords from his private service in the past but is reluctant to continue this arrangement in the future. 2.3 Heat Recovery System The community building and shop are currently served by generation heat recovery from the nearby power plant. The system consists of a shell and tube heat exchanger installed in the generator coolant system discharge piping in series with two remote radiators. There is no thermostatic valve in the heat recovery loop as is standard on AENREG generation heat recovery systems. A short run of copper supply and return piping runs approximately fifteen feet to the community building. Due to the limited time available during the site visit no inspection was made of the community building/shop heating system. Additional information regarding the existing buildings hydronic heating system will need to be gathered prior to project design to determine if heating or heat recovery system upgrades are warranted. 5 Elfin Cove Energy Infrastructure Projects Concept Design Report 2.4 Fuel Storage February 16, 2006 Alaska Energy and Engineering The existing Community Association-'owned tank farm is located on the shoreline adjacent to the fuel dock. It provides storage for virtually all of the diesel fuel and gasoline imported into Elfin Cove. The tank farm was fully funded with a loan taken out by the Community Association. It was constructed new in 2000, is in excellent condition and, except for a few minor issues observed during the site visit, appears to be a fully functional and code compliant facility. Some minor improvements are recommended as part of the proposed energy infrastructure upgrade projects. The tank farm contains four each 20,000 gallon horizontal double wall bulk storage tanks and three each horizontal double wall fire-rated dispensing tanks, two at 8,000 gallons and one at 5,000 gallons capacity. These double wall tanks now meet EPA secondary containment regulations due to the elimination of the single tank capacity and aggregate tank farm capacity size restrictions that were in effect at the time of the tank farm design and construction. Therefore the dike with liquid tight membrane liner is no longer required for tank farm secondary containment. Three each 4" barge fill pipelines and three each 2" distribution pipelines run from the tank farm to the fuel dock. The fuel dock has a three product marine header and marine dispensing of unleaded gasoline, #1 diesel and #2 diesel. Marine dispensing is from submersible pumps on the three dispensing tanks. Fuel transfers from the bulk tanks to the dispensing tanks are also from submersible pumps. A wooden pump house located adjacent to the tank farm contains controls for the dispensing/bulk transfer pumps as well as a community fuel distribution system for pumping fuel to the power plant and various heating oil tanks within the community. The Elfin Cove Electric Utility purchases fuel from the Community Association tank farm. The fuel is pumped to the 600 gallon power plant day tank through above grade community fuel distribution piping routed beside the boardwalk. According to PCE data the Community Association purchases an average of approximately 30,000 gallons of diesel fuel per year for power production. 3.0 COMMUNITY POWER DEMAND Power consumption data was obtained from the Power Cost Equalization (PCE) program for 1999 through 2005, and from electric utility operator logs. Graphs are included in Appendix D. According to 1995 through 2005 peE data the average annual load has ranged between 38.0kW and 45.4kW and annual fuel consumption averages around 30,000 gallons. According to the power plant operator logs the highest peak demand in 2004 was 144kW on July 21. The lowest peak demand in 2004 was 28kW on October 6. The 2005 peak demand, average demand and total kWh generated are lower than 2004 due to problems with the power plant's main generator. Several of the lodges were forced to self-generate during the peak summer demand period due to the inability of the power plant to carry the peak community load. An emergency repair project was undertaken to replace the 205kW unit with a low- 6 Elfin Cove Energy Infrastructure Projects Concept Desig n Report February 16, 2006 Alaska Energy and Engineering hour used 195kW unit donated to the community by the AEA but the installation was not completed until October, 2005, after the peak demand period had passed. 3.1 Estimated Future Load Growth It is important to evaluate the impact of planned infrastructure improvement projects on an existing power generation system. New construction and other community improvements can adversely impact the adequacy of existing facilities. The following individuals were contacted about possible future community improvement projects: • Mr. Gordy Wrobel, Chairman, Community Association • Mr. Raymond O'Neil, VSW Primary Project Engineer 239-2221 269-7603 Mr. Wrobel reported that there is currently planned construction of at least two new residences in Elfin Cove. Mr. O'Neil reported that a feasibility study has been completed for an improved water collection and distribution system. The community has not yet requested funding for the project and the system has not been designed. According to Mr. O'Neil the new system will be predominantly gravity feed, will have minimum freeze protection requirements and will therefore have minimal impact on near term future community fuel storage and power generation requirements. Unlike most rural Alaska communities, peak electric loads in Elfin Cove occur between July and September. These summer peak loads are primarily associated with local lodges that provide sport fish guiding and other recreation activities as well as the influx of seasonal residents involved in commercial fishing. Due to recent reliability problems with the existing 205kW generator some of the local lodges have been self-generating at peak daily demand times, such as during meal preparations. The improved reliability of the renovated power plant will eliminate the need for this self-generation and will likely cause an increase in peak summer loads. In addition it is estimated that peak summer residential and other electric loads will increase at a rate of 2% each year. Based on these factors, it is estimated that the peak summer electric load may increase by approximately 40kW over the next 5 years to around 185 kW. Due to the magnitude of both the daily and annual load fluctuations, it is important to size the generation equipment to maximize fuel economy, yet provide sufficient redundancy so that any two gensets have the capacity to carry the projected peak electric load. 3.2 Alternative Energy I Efficiency Improvements An analysis of a potential hydroelectric project is included in Section 4.5. Careful sizing and selection of new generators with advanced technology in conjunction with the installation of new fully automatic paralleling switchgear and a continuous off-line engine preheat system will likely result in a slight increase in community power generation fuel efficiency. 7 Elfin Cove Energy Infrastructure Projects Concept Design Report February 16, 2006 Alaska Energy and Engineering The proposed improvements to the generation heat recovery system described in Section 4.3 will maximize the efficiency of the system and the resulting fuel savings. The Community Association currently accepts used motor oil from the commercial fishing fleet as well as other producers within the community, including the power plant. .. The total quantity of used oil received/produced is currently approximately 1,000 gallons per year. Used oil accepted directly from private individuals is at times contaminated with other substances such as ethylene glycol, water or even gasoline. Since there is currently no means of testing for or separating out contaminants from the used oil, it is now all shipped off site for disposal at considerable cost to the community. A settling system or small centrifuge in conjunction with an end use facility such as a solid waste incinerator or shop space heater would reduce the amount of used oil shipped out for disposal, conserve energy within the community, and potentially save money in the long term. The community should contact AEA Energy Cost Reduction grant program manager Peter Crimp (888-300-8534) for information about possible grant funding for this type of project. The Alaska Energy Authority/Alaska Industrial Development and Export Authority published a draft Rural Alaska Energy Plan dated December 31, 2002 as a follow-up report to the previously released Screening Report of Alaska Rural Energy Plan dated April 2001. The Screening Report evaluated a dozen alternative energy technologies other than diesel engine heat recovery. Only wind energy was identified as alternative energy technology warranting further evaluation in the draft Rural Alaska Energy Plan. According to the Wind Energy Resource Atlas of the United States the community of Elfin Cove is located within a class 3 wind regime and is not a viable candidate for a wind energy program using currently available technologies. There are no other known practical energy sources, such as solid fuel or natural gas, currently available at Elfin Cove. At this time, it appears that new, more efficient diesel generators, supplemental hydroelectric generation and possibly additional end-use conservation are the only viable fuel-saving technologies available for Elfin Cove. 4.0 PROPOSED ENERGY INFRASTRUCTURE PROJECT DESCRIPTIONS The following proposed facility descriptions are separated into five sections: Section 4.1, "Power Plant Renovation", describes proposed upgrades to the existing Electric Utility power plant; Section 4.2, "Distribution Upgrades", describes proposed upgrades to the existing community electrical distribution system; Section 4.3, "Heat Recovery Upgrades", describes proposed upgrades to community building/shop hydronic heating systems; Section 4.4, "Tank Farm Upgrades", describes proposed minor upgrades to the Community Association tank farm; and Section 4.5 "Hydroelectric Project" describes the proposed Crooked Creek/Jim's Lake Hydroelectric project and transmission cable. 8 Elfin Cove Energy Infrastructure Projects Concept Design Report 4.1 Power Plant Renovation February 16, 2006 Alaska Energy and Engineering The power plant is located in the heart of the community, only ten feet from a lodge, less than fifteen feet from the community building and very close to several residences. Due to the proximity of the power plant to these public and private facilities, the Community Association has requested that the upgrade design specifically address the areas of fire safety, noise control and air quality: • Fire Safety -As mentioned previously, the existing power plant building does not meet IBC fire separation requirements. Preliminary discussions with the Deputy State Fire Marshall have resulted in a building renovation plan for correcting the situation. An as-built survey is required to locate improvements (buildings and boardwalk) relative to existing property boundaries. The final design will be reviewed by the State Fire Marshall's office for compliance with all current code and regulatory requirements. The renovated power plant will also contain an automatic fire alarm and water mist fire suppression system. This will be an improvement over the existing facility since there is currently no fire suppression. • Noise Control -The existing critical grade silencers will be replaced with interior mounted hospital grade silencers. The hospital grade silencers provide maximum noise reduction at the exhaust outlet. Placing all of the silencer shrouds inside the concrete building structure will maximize resonant sound absorption. All three exterior exhaust stacks will be routed up to a height of approximately 20' above grade. Sound attenuation will be provided at all building penetrations and combustion/ventilation air openings, with all openings located to minimize the noise impact on nearby buildings. • Air Quality -The existing generators are not EPA certified for low emissions. The proposed new generators will be at least EPA Tier I certified and the new marine jacketed (64kW) generator will be EPA Tier \I certi'fied. EPA certified engines are not currently required in the State of Alaska for small power plant installations like Elfin Cove, but due to advances in engine technology these new EPA certified gensets will be more fuel efficient and will produce lower emissions than the existing units. Raising the exhaust stacks, necking down the stack at the tip to increase velocity and terminating vertically will also allow for better dispersion of the exhaust plume and decrease the impact of emissions near the power plant. These improvements, in addition to the new automatic paralleling switchgear and improved power plant ventilation, will all have a positive effect of reducing emissions. Proper maintenance of the generators will be necessary to ensure long term clean operation of the engines. It is proposed that all three existing generators be replaced with new, cleaner and more fuel efficient units. One generator should be sized to handle the entire community load during peak load periods. Another generator should be sized to provide efficient generation during low (winter) loads while maximizing generation heat recovery. The third generator should be sized to efficiently handle intermediate loads and to combine with the small generator to provide peak capacity generation in case the main unit is offline for maintenance or 9 Elfin Cove Energy Infrastructure Projects Concept Design Report February 16, 2006 Alaska Energy and Engineering repairs. Therefore it is proposed that one each 190kW (summer peak), one each 110kW (intermediate load), and one each 64kW (winter load) prime rated generators be installed, for a total installed capacity of 364kW. The proposed 64kW (winter load) genset will be the prime genset for approximately eight months out of the year. This unit will be powered by a marine jacketed (water cooled exhaust manifold) engine to provide for additional generation heat recovery. The marine jacket will also significantly reduce the noise level of this genset. The following proposed upgrades are intended to modernize the existing community power plant, to bring it into compliance with IBC fire separation requirements, and to improve the overall fuel efficiency, reliability, fire prevention/protection, noise control, air quality and operations at the facility: • Renovate building to meet IBC fire separation requirements. • Install fire suppression and alarm systems. • Replace all three existing generators, utilizing marine jacketed unit for winter loads for improved generation heat recovery and quieter operation. • Replace existing switchgear and relays with new programmable automatic paralleling switchgear with hydroelectric intertie expansion capabilities. • Provide for continuous preheat of off-line generators to allow for immediate (less than thirty seconds) generator switching during times of sudden sharp increases in community demand. • Replace existing exhaust silencers with new interior mounted hospital grade silencers on all three generators. • Route new exhaust stacks higher and terminate vertically for improved exhaust dispersal and reduced noise. • Provide noise attenuation at all building penetrations. • Install adequate ventilation with sound-insulated air intake and exhaust fan ducting. • Replace existing engine coolant and generation heat systems with new system including thermostatic valve and brazed plate heat exchanger for improved efficiency. • Replace existing radiators with new radiators and variable speed motor controls. • Install new 100 gallon automatic fill day tank in power plant with redundant overfill protection. • Install new drop tubes on #1 & #2 diesel dispensing tanks. Install new filter, pump, and electric actuated ball valve at tank farm pump house. Install dedicated welded steel supply pipeline from tank farm to new day tank. 10 Elfin Cove Energy Infrastructure Projects Concept Design Report 4.2 Power Distribution Upgrades February 16, 2006 Alaska Energy and Engineering Proposed community power distribution upgrades include: • New pad-mount 10kVA secondary service transformer for planned new residential construction on north end of town. • New secondary service and lockable service meter for community small boat . dry dock grid. • Replace the existing harbor meters with eight dual service (16 total plugs) 30A 120V single-phase metered marina-style pedestals spaced evenly along the small boat harbor floats. • New dedicated single phase feeder and 20kVA pad-mount step down transformer for 120V service to small boat harbor (assumes 70% feeder loading and 0.40 demand factor for harbor). 4.3 Heat Recovery System Upgrades Generation heat recovery from the renovated power plant has the potential to save approximately 2,800 gallons of fuel use annually in Elfin Cove. The existing generation heat recovery and delivery equipment is approximately twenty years old and is due for replacement. The following improvements will be included in the final upgrade design: • Replace all heat recovery copper tubing with welded steel arctic pipe. • Install new heat exchanger, pump, and instrumentation in the power plant. • Install a recovered heat BTU meter in the power plant. • Install valves, equipment, and instrumentation as required in the community building and shop heating systems. • Install alarms for loss of 'flow and loss of pressure, and no load/backfeed condition with annunciation in the power plant switchgear. 4.4 Tank Farm Upgrades The following minor upgrades are proposed for the Elfin Cove Community Association tank farm: • Install missing required signage, including emergency shut down switch sign and DEC spill information signs. • Provide tank labels with required product and capacity information. • Install 6' tall chain link fence with a l' high barbed wire top around entire tank farm perimeter. • Install NEC required conduit seal-offs at area classification zone boundaries within tank farm. • Install pressure/vacuum whistle vents to provide audible overfill alarm on tanks. • Provide 85% mark on all tank liquid level gauges. 11 Elfin Cove Energy Infrastructure Projects Concept Design Report February 16, 2006 Alaska Energy and Engineering • Install pressure relief valves on isolated piping sections at community fuel distribution pump house. • Touch-up paint on existing fuel dock pipelines and provide new supports with isolation cushions to protect pipe coating. 4.5 Crooked Creek/Jim's Lake Hydroelectric Project In April, 1984 the Alaska Power Authority (APA) published a study entitled "Supplement to the Elfin Cove Reconnaissance Study" which analyzed a proposed 80kW hydroelectric generation facility to be located on Port Althorp approximately one mile south of Elfin Cove. At the time the report was written there was no community power generation or distribution in Elfin Cove. The project as described in the report consists of the following components: • A three to five foot high diversion dam on Crooked Creek constructed of local materials (wood, rock and earth). • A 1,650 foot long diversion conduit from Crooked Creek to Jim's Lake constructed of 18" diameter corrugated aluminum pipe. • A sluice gate and trash rack at the upper end of the Crooked Creek diversion conduit. • An intake siphon, trash screen and log weir at the Jim's Lake outlet. • A 2,400 foot long 12" diameter HDPE pipe penstock from the Jim's Lake outlet to the powerhouse, including intake valve, vacuum relief valve and pressure relief valve. • A single 80kW capacity pelton-wheel turbine with automatic governor and single-phase generator along with required switchgear. • A 10'x12' powerhouse shed, concrete pad and corrugated aluminum pipe tailrace. • A 6,700 foot long single phase transmission line of corflo-encased 15kV #2 XLP cable laid on top of the ground with splice cabinets at 500 foot intervals. • A single-phase electric distribution system throughout the community. All available data regarding the potential hydroelectric project, including the mentioned report, was forwarded to hydroelectric generation specialist Bob Butera, P.E. at HDR, Inc. Mr. Butera was tasked with analyzing the report along with available stream data and providing a cursory opinion on the feasibility, constructability and reliability of the proposed project. He was also tasked with providing an updated and inflation adjusted cursory budgetary cost estimate for the hydroelectric project. The HDR, Inc. analysis and revised cost estimate are based on the original proposed stand-alone hydroelectric generation project as described in the 1984 APA report and are included in Appendix E of this report. Following are proposed changes to the scope of the original APA Crooked Creek/Jim's Lake hydroelectric project due to changes in technology, existing community infrastructure and increased power demand in Elfin Cove since 1984: 12 Elfin Cove Energy Infrastructure Projects Concept Design Report February 16, 2006 Alaska Energy and Engineering • Community Distribution -At the time the 1984 report was written there was no community diesel power plant or distribution system in Elfin Cove. Therefore the proposed APA project included all required community distribution equipment. The community now has a diesel power plant and electrical distribution system so the distribution component of the original APA project has been removed from the revised project plan. • Site Access -The APA project does not provide for skiff access at the powerhouse site nor does it provide for permanent trails for ease of access to the penstock intake at Jim's Lake or the Crooked Creek diversion structure. Access to these sites will be required on a regular basis for inspection and maintenance operations. Therefore an allowance for construction of a small floating dock at the powerhouse and access foot trails to the entire hydroelectric infrastructure has been included in the revised cost estimate. • Hydroelectric Powerhouse -The APA project calls for a site-constructed 10'x12' wood frame building with slab on grade foundation. In order to minimize required site work another option may be to import a prefabricated modular powerhouse. The module could then be placed directly onto a piling foundation at tidewater by a barge-mounted crane. • Hydroelectric Turbine Automatic Governor -The proposed APA project called for an "automatic governor" on the hydroelectric turbine but did not include an allowance for installation of the required level sensing equipment at the reservoir or turbine control interface to the powerhouse. The revised cost estimate includes an allowance for a reservoir head probe and communication wires in conduit to the powerhouse as well as a solid state automatic turbine governor. • Diesel-Hydroelectric Hybrid System Communication & Controls -The original APA proposal was for a stand-alone single phase hydroelectric generation and distribution system and therefore did not require a scheme for integration with an existing diesel plant and three-phase distribution system. The new project will require a remote control/data communication scheme to allow the new hydroelectric powerhouse and the existing diesel power plant to operate as a hybrid paralleling system in order to get maximum benefit from the available hydro resources without jeopardizing the electrical power supply. Communication between the hydroelectric and diesel plants will be through 12-fiber armored fiber optic cable run along side the transmission line. • Switchgear & Step-upIStep-down transformers -Generation at the hydroelectric and diesel plants will be at 480V three-phase. In order to limit conductor size and line reactance the transmission voltage will be stepped up to 2.4/4.1 kV at the hydro end for transmission. The voltage will be stepped back down to 480V at the diesel plant for connection directly to the new 480V diesel plant switchgear and integration into the existing community distribution system. • Transmission Line -The proposed APA project called for a 6,700 foot long 7.2kV single-phase transmission line of corflo-encased 15kV #2 XLP cable 13 Elfin Cove Energy Infrastructure Projects Concept Design Report February 16,2006 Alaska Energy and Engineering laid on top of the ground from the hydroelectric powerhouse to the south end of Elfin Cove. The revised project plan is for a 9,000 foot long 2.4/4.1 kV three-phase transmission line of 5kV #2 CLX armored cable from the hydroelectric powerhouse to the diesel power plant. The cable will be shallow buried in hand-dug trenches where possible and run on top of ground where not possible. The final approximate 1,000 feet will be routed with the existing community boardwalks. • Turbine -The original APA proposal was for an 80kW pelton wheel style turbine. Due to advances in technology since 1984 it appears that a turgo style turbine with PLC controller is now a more cost effective and efficient choice for the flow available at the proposed hydroelectric facility. A single nozzle Turgo unit with a rated output of 107kW at 1200 RPM with a direct coupled 100kW generator has been proposed for the revised project. The Hydroelectric Project cost estimate provided in Appendix B incorporates the above proposed changes along with the inflation-adjusted cost estimate of the unchanged portions of the original APA project as provided by HDR, Inc. A step function approximation of availability versus demand was used to estimate potential fuel savings based on 2004 average electric loads and the following hydroelectric water flow assumptions: • Three summer high demand and mean flow months @ 65kW average hydroelectric production • One summer drought month @ 20kW average hydroelectric production • Seven winter low demand and mean flow months @ 30kW average hydroelectric utilization • One winter freeze-down month @ 13kW average hydroelectric production This corresponds to a total of 320,000 kWh of hydro-electric production per year. Assuming a diesel generation efficiency of 12.5 kWh/galion, the annual fuel savings is estimated to be approximately 25,600 gallons. 5.0 SITE SELECTION & CONTROL Work for this project will be performed in seven general areas: (1) The "Power Plant Site"; (2) The "Power Plant Fuel Pipeline Route"; (3) The "Tank Farm Site"; (4) "The Fuel Dock Site"; (5) The Harbor Site; (6) The Community Dry-Dock Grid Site; (7) The "Hydroelectric Project Site"; and (8) The "Hydroelectric Transmission Cable Route". There are no known flood hazards at any of these locations. 5.1 Power Plant Site The existing power plant is located on Lot 13A, U.S. Survey No. 2946 as shown in Appendix A, Sheet M2. The community building (ex-school building) is also located on this lot, approximately fourteen feet from the power plant. The corner of the power plant building entry/storage room is over the property line shared with the adjacent boardwalk easement and is also less than ten feet from the Eagle Charters Lodge building directly across the boardwalk. 14 Elfin Cove Energy Infrastructure Projects Concept Desig n Report February 16, 2006 Alaska Energy and Engineering 5.2 IBC Fire Separation Requirements The IBC requires minimum separations from buildings to a property line or the centerline of a public easement (fire separation distance) depending on occupancy, type of building construction and fire resistance rating of exterior walls. The power plant falls within IBC occupancy group F-1 (Factory Industrial, Moderate Hazard), which includes electric light plants and power houses. The adjacent community building is currently used for public meetings, which falls under occupancy group A-3 (Community Halls). The adjacent lodge falls under occupancy group R-1 (Boarding Houses & Hotels). For the purposes of this study it is assumed that all three buildings are non-fire rated construction throughout with no automatic sprinkler systems, which classifies them as Type V-B construction per the IBC. The following table summarizes the IBC fire- resistance rating and fire separation distance requirements for the previously mentioned occupancy groups of construction Type V-B only: I FIRE-RESISTANCE RATING REQUIREMENTS (TYPE V-B CONSTRUCTION) OCCUPANCY OCCUPANCY OCCUPANCY FIRE SEPARATION GROUP F-1 GROUPA-3 GROUP R-1 DISTANCE (POWER (COMMUNITY (LODGE) PLANT) BUILDING) less than 5' 2hr 2hr 2hr greater than or equal to 5' 1hr 1hr 1 hr and less than 10' greater than or equal to 10' Ohr Ohr Ohr and less than 30' The existing power plant entry/storage room encroaches into the public easement and is less than 5'-0" from the easement centerline. The IBC would require the walls and door in this area to be 2hr rated assemblies, which would be impractical to meet. Therefore it is proposed to remove the existing entry/storage room and relocate it so that it does not encroach into the public easement and is at least 5'-0" from the easement centerline, which would require only a 1 hr rated door and wall assembly. The proposed fire separation boundary as shown on Sheet M4 would be less than 10' from the walls of the existing lodge and community buildings. According to the State Fire Marshall's Office, this would not immediately impact these buildings. However, any future major renovations to the affected portions of these buildings would require a plan review and could require existing structural assemblies to be improved to a 'I hr or 2hr rating at the time of the future renovation. 15 Elfin Cove Energy Infrastructure Projects Concept Design Report 5.3 Power Plant Fuel Pipeline Route February 16, 2006 Alaska Energy and Engineering The proposed new day tank fill pipeline will be routed within Lots 3 and 138, USS 2946 alongside the existing boardwalks from the tank farm to the power plant. See Appendix A, Sheet M2. 5.4 Tank Farm Site The existing Community Association tank farm is located within Lot 2, USS 2946. All tank farm upgrades will occur within the existing tank farm property boundary. See Appendix A, Sheet M2. 5.5 Fuel Dock Site The fuel dock and associated fill and distribution pipelines are located within Alaska Tidelands Survey No. 443 (ATS 443). All fuel dock pipeline upgrades will occur within the existing tidelands survey property boundary. 5.6 Harbor Site The small boat harbor is located within ATS 1473, with the access ramp located within Lot 1 of ATS 442. The electrical service upgrades on the harbor floats will occur within these existing tideland survey boundaries. See Appendix A, Sheet M2. 5.7 Community Dry-Dock Grid Site The community dry dock grid is located within ATS 1473. The electrical service upgrades at the dry-dock grid will occur within the existing tideland survey boundary and adjacent upland property. See Appendix A, Sheet M2. 5.8 Hydroelectric Project Site If constructed, the hydroelectric project will be located approximately one mile south of Elfin Cove. The project area encompasses a portion of the Crooked Creek and Jim's Lake drainages and extends to the powerhouse at the Port Althorp shoreline. The proposed diversion dam and a portion of the diversion conduit are located within Section 31, Township 42 South, Range 56 East. The diversion conduit termination and penstock inlet at Jim's Lake are within Section 6, Township 43 South, Range 56 East. The penstock will also cross Section 31, Township 43 South, Range 55 East and terminate at the powerhouse within Section 36, Township 42 South, Range 55 East. See Appendix At Sheet M1. 5.9 Hydroelectric Transmission Cable Route The proposed transmission cable will be routed cross country within Section 36, Township 42 South, Range 55 East from the powerhouse to the southern boundary of the Elfin Cove community. The cable will then follow the existing single phase at-grade distribution line north across private parcels to the boardwalk, where it will be supported below the boardwalk in conduit approximately 1000' to the power plant. See Appendix A, Sheets M1 and M2. 16 Elfin Cove Energy Infrastructure Projects Concept Design Report 5.10 Site Control February 16, 2006 Alaska Energy and Engineering A Certificate to Plat was issued by Southeastern Title Agency effective December 8, 2005. A copy of the Plat Certificate is included in Appendix C. Additional independent site control research was conducted to verify title to existing rights of ways and adjacent lands, which were not identified in the Certificate to Plat. The existing power plant, located on Lot 13A, USS 2946, is vested in the Community of Elfin Cove. The new power plant fuel pipeline is located on Lots 3 and 138 of USS 2946. Lot 138 is owned by the State of Alaska. The State of Alaska Department of Transportation issued a Declaration of Public Right of Way, July 2, 1999, which includes Lot 3. A copy of the Declaration was not included in the Cert to Plat. A copy of the Declaration has been requested from the recorders office. The existing tank farm site, located on Lot 2, USS 2496, is vested in the Community of Elfin Cove. The fuel dock site, located within Alaska Tidelands Survey No. 443, is vested in the Community of Elfin Cove. There is a 1978 reference to a lease of dock facilities with Pelican Cold Storage Company; however, there is no recorded document for this lease. The harbor site is located within ATS 1473 and Lot 1 of ATS 442. Lot 1 of ATS 442 is vested in the Community of Elfin Cove. ATS 1473 is vested in the State of Alaska. The community dry dock grid, located within ATS 1473,is vested in the State of Alaska. The hydroelectric project site is located within the Tongass National Forest boundary, which is owned by the United States of America. Should the hydroelectric project progress to final design, permits and easements/rights-of- ways will need to be secured prior to construction. The cross country portion of the hydroelectric transmission cable traverses Section 36, Township 42 South, Range 55 East, which is owned by the United States of America. The portion of the cable within the community crosses several privately held parcels. Easements and/or rights-of-ways will need to be secured for the transmission cable route. 6.0 PERMITTING AND SPILL RESPONSE The renovated power plant and existing tank farm are subject to regulations of both State and Federal agencies including the Alaska Coastal Management Program, the Alaska Department of Environmental Conservation (ADEC), the Division of Fire Prevention, and the U.S. Environmental Protection Agency and U.S. Coast Guard. 6.1 Environmental Assessment An Environmental Assessment (EA) will be completed prior to construction of the proposed project. An EA is required for all projects that are federally funded or require a federal permit (such as a Corps of Engineers Wetlands Permit). The 17 .Elfin Cove Energy Infrastructure Projects Concept Design Report February 16, 2006 Alaska Energy and Engineering EA determines whether there is a significant impact to the environment caused by the project. As part of the EA, a Coastal Zone Management Project Questionnaire will be completed and submitted to the Alaska Coastal Management Program. The Coastal Zone Management Project Questionnaire helps to identify state or federal permits that may be required. 6.2 Fire Code A Plan Review permit from the State Fire Marshal is required for the fuel and power plant portions of the project. Final stamped design drawings will be submitted to the Fire Marshal for review prior to construction. Plans will be reviewed for conformance with the International Fire Code and related codes including the International Building Code and the National Electrical Code. The review process can take anywhere between 3 weeks to 6 months. 6.3 Spill Response Because the existing Community Association tank farm has oil storage tanks in excess of 1,320 gallons and receives delivery by marine vessel, it is subject to U.S. Environmental Protection Agency and U.S. Coast Guard regulations. If required, the existing Coast Guard and EPA plans will be reviewed and updated and additional spill response gear will be purchased as part of this project. 6.4 Hydroelectric Project Permitting In addition to the EA requirements listed above, the hydroelectric portion of this project will require the following separate permits/review process if built: • Alaska Department of Natural Resources o Water Rights Permit o Fish Habitat Permit o Coastal Zone Management Consistency Review • Federal Energy Regulatory Commission (FERC) license or waiver • Site control permits and/or easements for access to the site and for electric transmission cable right of way. 7.0 CONSTRUCTION PLAN The AEAlREG has a history of administering similar projects on a "modified" force-account basis. Force-account construction involves the owner or grantee acting as the employer and utilizing primarily local labor. This method tends to achieve a higher percentage of local hire and is strongly supported by many communities and funding agencies. The highly technical nature of power generation and distribution projects requires a limited number of workers with spedfic experience and expertise to be brought in for the project when not available locally. All work must be supervised and managed by a superintendent with extensive experience in the construction of rural power generation and distribution systems. All specialty work, such as pipe welding and electrical installation must be performed by skilled craftsmen with appropriate certifications. An experienced construction manager will be required to recruit 18 Elfin Cove Energy Infrastructure Projects Concept Design Report February 16, 2006 Alaska Energy and Eng ineering the necessary skilled labor, coordinate the construction team, and oversee procurement and project logistics. The design engineer will provide quality control through communication with the construction manager and periodiC on- site inspections. The nature of the projects identified will allow most of the projects to be constructed simultaneously and independently from the other. The power plant, distribution and tank farm upgrades as well as the hydroelectric project are separate and will not necessarily need to be constructed using the same construction management teams. There is no direct shipping or ferry service into Elfin Cove. All project construction materials and equipment will be staged in Juneau and delivered to Elfin Cove using a local barge or landing craft service. 7.1 Local Job Skills As previously noted, the number of year round residences in Elfin Cove was only 26 as of the 2004 census. The population increases dramatically in the summer with the influx of commercial fishermen, lodge owners, lodge employees and tourists .. Few, if any, of these summer residents would be available to work on the energy infrastructure upgrade projects. Every effort should be made to hire locally but it should be assumed that many of the project supervisors and workers will need to be hired outside of the community. 7.2 Local Equipment There is no locally available heavy equipment in Elfin Cove. 7.3 Material Sources This project has minor site development so very little fill material will be required. There is no borrow source for gravel within the community. 19 Elfin Cove Energy Infrastructure Projects Concept Design Report 8.0 SCHEDULE February 16, 2006 Alaska Energy and Engineering The proposed project schedule is separated into two sections: Section 8.1, "Power System Upgrades Schedule", and Section 8.2, "Hydroelectric Project Schedule". The "Power System Upgrades" project includes all power plant, tank farm, fuel pipeline, heat recovery and power distribution work. The schedules have been set to take advantage of the best seasonal weather for most work. All schedules are contingent on timely approval of the plan by all project participants and the Denali Commission. 8.1 Power System Upgrades Schedule It will be most efficient to manage the power plant, heat recovery system, tank farm and distribution system upgrade work as one project due to their interdependence, the similarity of work skills required, and their proximity to each other. There is no site development work associated with these projects and a good portion of the work is not weather dependent. Therefore an off-season schedule was developed to take advantage of better construction personnel availability and to have the least impact on the local summer tourism and fishing economies. It is assumed that funding could be available in time for construction in early 2007. The schedule could be adjusted as required to accommodate funding availability. • Mar-Nov 2006: Design, permitting, and site control. • Oct -Dec 2006: Order generators, switchgear, radiators, materials, etc .. • Feb 2007: Mobilization and temporary power installation. • Feb-April 2007: Project construction. • May 2007: Project completion, power plant commissioning & operator training. • June 2007: O&M manuals and project close out. 8.2 Hydroelectric Project Schedule Permitting and design for the hydroelectric project would not likely be completed in time for summer 2007 construction due to the long expected time frame for State and Federal permit approval. Therefore, the following schedule has been developed on the basis of performing the majority of the work for the hydroelectric project during early spring through summer 2008. This schedule is contingent on timely approval of the plan by the Elfin Cove Community Association and Denali Commission as well as on funding availability. • Mar 2006-Aug 2007: Design, permitting, and site control. • Sep 2007: Order turbine, switchgear, building materials, etc .. • March 2008: Project mobilization, startup. • March-July 2008: Project construction. • August 2008: Project completion, commissioning & operator training. • Sep 2008: O&M manuals and project close out. 20 Elfin Cove Energy Infrastructure Projects Concept Design Report 9.0 COST ESTIMATE February 16,2006 Alaska Energy and Engineering The construction cost estimates have been developed based on a "modified" force-account approach utilizing a combination of local labor, certified craftsmen, and specialty sub-contractors under the direction of an experienced construction manager. Labor rates are based on Title 36 equivalent wages for certified specialty labor and prevailing local force-account wage rates for general labor and equipment operation. Detailed cost estimates are included in Appendix B. Separate estimates have been prepared for the Power System Upgrade (including power plant, tank farm, fuel pipeline, power distribution and heat recovery upgrades) and the Crooked Creek/Jim's Lake Hydroelectric Project. The estimated total project cost including all design, supervision, inspection, permitting, and a 15% contingency for each component is: • $1,016,185 Power System Upgrades • $1,495,115 Crooked Creek/ .. lim's Lake Hydroelectric Project The total installed generation capacity of the renovated diesel power plant is 364kW. The unit cost of the Power Plant Upgrade is $2,792/kW which is below the Denali Commission benchmark cost range of $3,500 to $2,900 per installed kW for 201W to 400kW capacity power plants. It is assumed that the operation and maintenance costs of the hydroelectric plant will be comparable to that of the diesel generators. Therefore, the hydroelectric project cost of $1,495,115 needs to be compared to the primary benefit which is the avoided fuel cost. It is estimated that the hydroelectric generator would offset approximately 25,600 gallons of diesel fuel per year. Using the average fuel price paid by the electric utility in 2005 of $2.52/gallon this equates to an annual savings of $64,500. 21 APPENDIX A CONCEPT DESIGN DRAWINGS I TOWNSHIP 42S ----4-1 --- TOWNSHIP 43S 1 "=1/4mi (APPROXIMATE) PROJECT: ELFIN COVE ENERGY INFRASTRUCTURE PRO.IECTS TITLE: OVERALL PROJECT SITE PLAN w w U") I <0 U")IU") ~ ~ z z « « ~ SEE SHEET M2 0::: 0::: FOR ALL ENERGY . INFRASTRUC~TURE : ~ UPGRADE WORK t::d IN TOWNSITE AREA _BI': IlESICNED BI': AI[!WIIE SHEET OF LfIN-CDR-t.tl M 1 5 25 30 36 31 I HYDROELECTRIC TRANSMISSION CABLE ROUTE POWERHOUSE DIVERSION ~ DAM ~ HYDROELECTRIC PROJECT SITE ----- PENSTOCK DIVERSION CONDUIT stat., 01 AlaI"" • DMI nt Deparlqlent of Communl1;)' and EconomIC opme * 1f AIDEA/AEA *,e Rural Ene(gy Gn>up ~ALASKA a'l Wwt Northem Ll9ht. BML '_E"EFIGYAUTHORITY * * -Mc:ttorDte. No.ka n5DJ FUEL DOCK SITE EXISTING 3" BARGE FILL AND 2" DISPENSING PIPELINES TO RECEIVE MINOR UPGRADES (SIX PIPELINES TOTAL) TANK FARM SITE -EXISTING TANK FARM TO RECEIVE MINOR UPGRADES 1 "=150' PROJECf: ELFIN COVE ENERGY INrRASTRUCTURE PROJECTS ENLARGED AREA SITE PLAN NEW SECONDARY SERVICE TRANSFORMER FOR PLANNED NEW RESIDENCES POWER PLANT SITE - EXISTING POWER PLANT , TO BE RENOVATED. SEE \~.EEE1ETS M3. M4 & M5 @)~ , , HEAT RECOVERY » SYSTEM UPGRADES AT : COMMUNITY "I "'- HALL & SHOP I~ I "'-, ® Iv; , c:%f-,--"--L..l / HYDROELECTR Z 1 1 1 \Z HARBOR X SITE , IJIAWN lit: SCIt£: 1·'" 150' WIGN!ll lit: DAlE: 2/16/06 Fl£ NII£ SHEET OF LF'IN-CDR-t.l2 M 2 5 \ , \ / TRANSMISSION () UPGRADED DISTRIBUTION AND SERVICE METERS ON " HARBOR / FLOATS CABLE ROUTE USS 2947 NEW PRE-PAY METER FOR COMMUNITY BOAT DRY -DOCK GRID I I (2) PORTI~~ +''-----OF : ,,~ APPROX. LOCATION OF ENTRY / ' , ~ LINES, TYP LODGE EXISTING I ~ ,/ EXISTING PROPERTY STORAGE -............, AA~ '~ R-l OCCUPANCY WOOD FRAME INTO PRE -CAST ENCROACHING I ® PROJECT: PUBLIC CONCRETE "'\ ~SEMENT : & WITHIN 5' OF CENTERLINE OF PUBLIC ~SEMENT I \ I I I I I \ I I I I I I @I I I I I I I I I I POWER PLANT F-1 OCCUPANCY /"" WOOD FRAME CHASE AROUND EXHAUST RISERS TO BE REMOVED PRE-CAST CONCRETE TO REMAIN "-RADIATOR SHED TO BE REMOVED COMMUNITY BUILDING A-3 OCCUPANCY WOOD FRAME CONSTRUCTION , ELFIN COVE IlIWIIN 81': sr.tI£:'"= 10' SIIlta a/ AIoeIuI , Ooopartrpent of Comiriunlt}! and Econom1c ~ ENERGY INFRASTRUCTURE PROJECTS IESIGNED 81': DATE: 2-16-06 * ~lIr AlOtA/AEA. r-:TIIl.E:.,....,-....;;;.:..=.:..;.:;..;.....;~;....;.;;...;~;....;.;;...;..;.;;;...-~..;.;;;...----f.fl£~IWI£~--+-:6SH==EU,.;;-:-=--:iOf:-t * ftu"" Ifiiei1Dr Group r-!!! ALASKA . POWE~ PLANT ~J3 * * L e.~ __ """:..~hI. ,1I""EAGYAUTHeAITV EXISTING SITE/DEMOLrrlON PLAN LFIN-CDR-1A3 M 5 PRO.IECT: I I I I : / EXISTING PROPERTY ~ LINE, TYP -r I ~" I I -........z LODGE R-l OCCUPANCY WOOD FRAME i --~ ~ I.J.... o w z ~I w t- Z W U ELFIN COVE ENERGY INFRASTRUCTURE PROJECTS POWER PLANT PROPOSED FIRE SEPARATION PLAN lHR CONSTRUCTION REQUIRED, INTERIOR WALL PROTECTION ONLY DRAIN 1Ir: COMMUNITY BUILDING A-3 OCCUPANCY WOOD FRAME CONSTRUCTION stILE: 1"= 10' IlESIGIIED 1Ir: DATE: 2/16/06 fl.E NNoE SHEEr OF lFIN-CDR-t.l4 M 4 5 o TO 5' FROM POWER PLANT I; IMAGINARY I PROPERTY UNE, TYP 1"=10' State of Alollka Depar\q1ent 01 Community and _nomic Dortelopment '*'*_ AIDEA/AEA . Rural Ene,tgy Group ALASKA ::-a'3~~ ~503I1rfd. r:ENlERGYAUTHORITY FIRE SUPPRESSION CONTROL PANEL & AGENT RACK D AUTOMATIC FILL 100 GALLON DAY TANK ". ....... . .... ' .. , ... -...... . GEN#3, 64kW HOSPITAL GRADE SILENCER, TYP(3) / ~.,.---,I ~ x EF-1 ~cS~~ I ?~N#2 110kW / . x EF-2 ~cS~~ 19~~#1 190kW . --;-, REt2 I HEAT EXCHANGER, ~;- PUMP, VALVES, ETC "':;: : cD . I RELOCATED ENTRY/ STORAGE 'R~l I ASTE GEN GEN GEN :. -I M #1 #2 #3 j I AUTOMATIC PARALLELING SWITCHGEAR PROJECT: ELfiN COVE ENERGY INfRASTRUCTURE PROJECTS POWER PLANT RENOVATION PLAN RADIATOR VFD PANELS • " " ••••• p •••• ". " •• ' :....J INSTALL SHED ~OOF\ OVER RADIATORS _ BY: JTD SCIL£: 3/16"=1' DESIlNED BY: BeG DAlE: 2/16/06 AL£ IWoIE SHEET OF ELFIN-CDR-t.45 M 5 5 APPENDIX B CONSTRUCTION COST ESTIMATE ALASKA ENERGY & ENGINEERING ELFIN COVE RURAL POWER SYSTEM UPGRADE COST ESTIMATE SUMMARY TEMPORARY GENERATION $9,200 POWER PLANT BUILDING RENOVATION $18,400 POWER GENERATION DEMOLITION $7,800 POWER GENERATION UPGRADES $468,375 TANK FARM UPGRADES & FUEL PIPELINES $65,415 HEAT RECOVERY UPGRADES $22,500 DISTRIBUTION UPGRADES $53,700 MISCELLAN EOUS $14,500 OVERHEAD $51,100 FREIGHT $32,649 CONSTRUCTION SUB-TOTAL $743,639 DESIGN AND CONSTRUCTION ADMIN. $70,000 CONSTRUCTION MANAGEMENT $70,000 PROJECT SUB-TOTAL $883,639 CONTINGENCY $132,546 15 % TOTAL PROJECT COST $1,016,185 TOTAL INSTALLED KW CAPACITY 364 kW COST PER KW OF INSTALLED CAPACITY $2,791.72 B-1 FEBRUARY 16, 2006 PRELIMINARY DESIGN REPORT ALASKA ENERGY & ENGINEERING ITEM QUAN UNIT UNIT COST TEMPORARY GENERA TOR Set Up Temporary Generator 1 lump $0 Generator Rental 3 month $2,000 POWER PLANT BLDG RENOVATION Remove Entry & Exhaust ChasE 1 lump $0 Misc Building Modifications 1 lump $3,000 New Entry/Storage 1 lump $5,000 POWER GENERATION DEMOLITION Provide Temp Station Service 1 lump $0 Remove Three Generators 1 lump $0 Remove Switchgear & Conduit 1 lump $0 Remove Exhaust Silencers 1 lump $0 Remove CoolantlHR/Fuel Pi~e 1 lump $0 Remove Radiators & HX 1 lump $0 Remove Exist Lighting 1 lump $0 POWER GENERATION UPGRADES 190 kW Genset (JD 6081) 1 ea. $48,000 110 kW Genset (JD 6068) 1 ea. $40,000 64 kW Genset (JD 4045) 1 ea. $40,000 Switchgear 1 ea. $140,000 Fire Supression 1 lump $25,000 Major Electrical Equipment 1 lump $5,000 VFD & Day Tank Panels 1 lump $18,000 Wireway 1 lump $3,000 Conduit, Fittings, Wire, Etc. 1 lump $7,000 Feeder & Shielded Cable 1 lump $6,000 Ducts, Fans, Dampers, Etc. 1 lump $16,000 Radiators 2 ea. $9,000 Hydronic Piping, Equip 1 lump $8,000 Day Tank 1 lump $2,000 Day Tank Appurtenances 1 lump $5,000 Fuel Oil Piping 1 lump $2,500 Hoses & Fittings 1 lump $1,500 Exhaust Thimbles, Pipe, Etc 1 lump $3,000 Misc Strut, Hangers, Fasteners 1 lump $4,000 Fill Coolant, Fuel, & Lube 1 lump $5,000 ELFIN COVE POWER SYSTEM UPGRADE CONSTRUCTION COST ESTIMATE MATL UNIT LAB LAB LABOR COST HRS HRS RATE COST $0 40 40 $80 $3,200 $6,000 0 0 $80 $0 $0 40 40 $65 $2,600 $3,000 40 40 $65 $2,600 $5,000 80 80 $65 $5,200 $0 10 10 $65 $650 $0 40 40 $65 $2,600 $0 20 20 $65 $1,300 $0 10 10 $65 $650 $0 20 20 $65 $1,300 $0 10 10 $65 $650 $0 10 10 $65 $650 $48,000 30 30 $80 $2,400 $40,000 30 30 $80 $2,400 $40,000 30 30 $80 $2,400 $140,000 60 60 $80 $4,800 $25,000 80 80 $80 $6,400 $5,000 50 50 $65 $3,250 $18,000 40 40 $65 $2,600 $3,000 40 40 $65 $2,600 $7,000 140 140 $65 $9,100 $6,000 60 60 $65 $3,900 $16,000 80 80 $65 $5,200 $18,000 20 40 $65 $2,600 $8,000 150 150 $65 $9,750 $2,000 10 10 $65 $650 $5,000 30 30 $65 $1,950 $2,500 40 40 $65 $2,600 $1,500 15 15 $65 $975 $3,000 60 60 $65 $3,900 $4,000 40 40 $65 $2,600 $5,000 20 20 $65 $1,300 8-2 CONTR COST FEBRUARY 16, 2006 PRELIMINARY DESIGN REPORT FREIGHT TOTAL UNIT TOTAL COST COST WT WT(#) $3,200 4,000 4,000 $6,000 0 0 $2,600 0 $5,600 0 $10,200 0 $650 0 $2,600 0 $1,300 0 $650 0 $1,300 0 $650 0 $650 0 $50,400 3,000 3,000 $42,400 3,000 3,000 $42,400 2,500 2,500 $144,800 2,000 2,000 $31,400 1,000 1,000 $8,250 500 500 $20,600 300 300 $5,600 500 500 $16,100 2,000 2,000 $9,900 1,000 1,000 $21,200 1,500 1,500 $20,600 400 800 $17,750 2,000 2,000 $2,650 500 500 $6,950 250 250 $5,100 200 200 $2,475 200 200 $6,900 1,000 1,000 $6,600 500 500 $6,300 3,000 3,000 ALASKA ENERGY & ENGINEERING ITEM QUAN UNIT UNIT COST TANK FARM & FUEL PIPELINES 2" Sch 80 Welded Coated 300 lin. ft. $8.00 1" Actuator Valve 1 ea $1,400 2" Pipeline Filter 1 ea $1,200 2" Flanged Ball Valves 4 ea $225 2" Flanged Check Valves 2 ea $175 PressureNacuumIWhistle Vent 7 ea $250 1" Flanged PRV 3 ea $475 New Drop Tubes on Disp Tanks 1 lump $300 Signs 1 lump $500 6' Chain-Link Fence 350 lin.ft. $10.50 Dock Pipeline Supports 1 lump $2,000 Paint Dock Pipelines 1,500 sq.ft. $0.60 Classified Boundary Seal-Ofts 1 lump $1,000 Conduit, Conductors, & Devices 1 lump $4,000 HEAT RECOVERY UPGRADES Arctic Pipe 1 lum2 $2,000 PP Heat Exchanger 1 ea. $2,500 PP Heat Recov Pipe & Devices 1 lump $1,000 Buildings HX & Pipin9_ 2 ea. $2,000 DISTRIBUTION UPGRADES 10kVA Residential Xfrmr 1 lump $2,000 20kVA Harbor Xfrmr 1 lump $2,500 Drydock Grid Secondary Servic 1 lump $8,000 Harbor Feeder 1 lulllP $2,000 Harbor Pedestals 8 ea. $1,500 MISCEllANEOUS Spill Response Supplies 1 lump $2,000 SmartAsh with spare parts 1 lump $3,000 Misc Hardware 1 lump $2,000 Misc Tools & Safety Gear 1 lump $5,000 Welding Rod, Gases, Etc. 1 lump $2,500 OVERHEAD Audit Grants 1 lump Rent Heavy Equip. 1 lump Test & Commission System 1 lump ELFIN COVE POWER SYSTEM UPGRADE CONSTRUCTION COST ESTIMATE MATl UNIT lAB lAB LABOR COST HRS HRS RATE COST $2,400 0.30 90 $65 $5,850 $1,400 4 4 $65 $260 $1,200 4 4 $65 $260 $900 2 8 $65 $520 $350 2 4 $65 $260 $1,750 2 14 $65 $910 $1,425 4 12 $65 $780 $300 20 20 $65 $1,300 $500 10 10 $65 $650 $3,675 0.50 175 $65 $11,375 $2,000 60 60 $65 $3,900 $900 0.10 150 $65 $9,750 $1,000 40 40 $65 $2,600 $4,000 80 80 $65 $5,200 $2,000 40 40 $65 $2,600 $2,500 20 20 $65 $1,300 $1,000 100 100 $65 $6,500 $4,000 20 40 $65 $2,600 $2,000 30 30 $80 $2,400 $2,500 30 30 $80 $2,400 $8,000 40 40 $80 $3,200 $2,000 40 40 $80 $3,200 $12,000 25 200 $80 $16,000 $2,000 0 0 $65 $0 $3,000 0 0 $65 $0 $2,000 0 0 $65 $0 $5,000 0 0 $65 $0 $2,500 0 0 $65 $0 60 60 $80 $4,800 B-3 CONTR COST $6,000 $5,000 FEBRUARY 16, 2006 PRELIMINARY DESIGN REPORT FREIGHT TOTAL UNIT TOTAL COST COST WT WT(#) $8,250 5 1,500 $1,660 25 25 $1,460 20 20 $1,420 30 120 $610 30 60 $2,660 20 140 $2,205 10 30 $1,600 1000 1000 $1,150 100 100 $15,050 15 5250 $5,900 1000 1000 $10,650 0.20 300 $3,600 1000 1000 $9,200 1000 1000 $4,600 1000 1,000 $3,800 500 500 $7,500 1,500 1,500 $6,600 100 200 $4,400 2,000 2,000 $4,900 2,000 2,000 $11,200 50 50 $5,200 500 500 $28,000 50 400 $2,000 600 600 $3,000 200 200 $2,000 500 500 $5,000 500 500 $2,500 1000 1000 $6,000 $5,000 $4,800 ALASKA ENERGY & ENGINEERING ITEM QUAN UNIT UNIT COST Train Local Operators 1 lump Superintendent Overhd Off-Site 1 lump Superintendent Overhd On-Site 1 lump Crew Travel Time 1 lump Crew Airfares 8 trips Crew Per Diem 200 mn.dy Housing Rent 3 mo. FREIGHT Barge Freight Seattle-Juneau 48,245 lb. $0.20 Freight & Equip Mob 4 day $3,000 Project De-Mob 2 day $3,000 Misc Small Freight & Gold Strea 1 lump $5,000 CONSTRUCTION SUB-TOTAL Engineering (Design & CCA) 1 lump Construction Management 1 lump PROJECT SUB-TOTAL Contingency 15 % ELFIN COVE POWER SYSTEM UPGRADE CONSTRUCTION COST ESTIMATE MATL UNIT LAB LAB LABOR COST HRS HRS RATE COST 40 40 $80 $3,200 40 40 $80 $3,200 40 40 $80 $3,200 80 80 $80 $6,400 $483,300 2,836 $197,390 $483,300 $197,390 CONTR COST $6,400 $8,400 $4,500 $30,300 $70,000 $70,000 $170,300 FEBRUARY 16, 2006 PRELIMINARY DESIGN REPORT FREIGHT TOTAL UNIT TOTAL COST COST WT WT(#) $3,200 $3,200 $3,200 $6,400 $6,400 $8,400 $4,500 48,245 $9,649 $12,000 $6,000 $5,000 $32,649 $743,639 $32,649 $883,639 $132,546 ITOTAL PROJECT COST $1,016,185 B-4 ALASKA ENERGY AND ENGINEERING CROOKED CREEK/JIM'S LAKE HYDROELECTRIC GENERATION COST ESTIMATE SUMMARY WORK ITEM MATERIAL LABOR REVISED 1984 EST (SEE APPENDIX E) INCREASE FOR HIGHER LABOR RATE $60,000 LESS 1 0'x12' POWERHOUSE SHED & CONCRETE PAD ($7,500) ($6,700) LESS PEL TON TURBINE/SINGLE-PHASE GEN ($142,000) ($8,000) LESS SINGLE-PHASE TRANSMISSION COMPONENT ($58,000) ($8,700) 4,000' OF ACCESS TRAILS $10,000 $30,000 HYDRO POWERHOUSE & FOUNDATION PILINGS $30,000 $10,000 TURGO TURBINE/3-PHASE GEN W/ PLC & SWITCHGEAR $160,000 $20,000 ARMORED FIBER OPTIC DATA CABLE $12,500 $4,500 9,000' 5kV 3-PHASE #2 ARMORED CABLE TRANS LINE $135,000 $65,000 112.5kVA STEP-UP & STEP-DOWN TRANSFORMERS $16,000 $8,000 DIESEL PLANT SWITCHGEAR CONNECTION & PROGRAMMING $10,000 $10,000 CONSTRUCTION SUB-TOTAL FREIGHT DESIGN AND CONSTRUCTION ADMIN. CONSTRUCTION MANAGEMENT FERC PERMITTING PROJECT SUB-TOTAL CONTINGENCY TOTAL PROJECT COST 8-5 FEBRUARY 16, 2006 PRELIMINARY DESIGN REPORT TOTAL $600,000 $60,000 ($14,200) ($150,000) ($66,700) $40,000 $40,000 $180,000 $17,000 $200,000 $24,000 $20,000 $950,100 $40,000 $80,000 $80,000 $150,000 $1,300,100 $195,015 15 % $1,495,115 APPENDIXC SITE CONTROL DOCUMENTS Alaska Energy and Engineering. Inc. Mailing Address -P.O. Box 111405 AnchoraR:e, AK 99511-1405 (907) 349-0100 349-8001 fax November 22, 2005 Southeastern Title Agency ATTN: Duane Kauffman, President P.O. Box 1223 Sitka, AK 99835-7701 Subject: Elfin Cove Certificate to Plat Information Dear Mr. Kauffman: (2 Pages Faxed) 907-747-3616 Please find enclosed Sheet M1 of 1 for the Elfin Cove Energy Infrastructure Projects Certificate to Plat Areas of Interest, ATS 443, ATS 442 & USS 2946. Please prepare a Certificate to Plat to include the following items: • Parcel 1: Timber approach pier of ATS 443. • Parcel 2: Lots 2,3,6,7,13, 13A, & 13B of USS 2946 • Parcel 3: Lot 1 of ATS 442 • Parcel 4: ATS 1473. Please indicate the estimated lead-time to deliver the Certificate to Plat. You are authorized to bill up to $500 for this effort. If you anticipate exceeding this amount, please call me prior to proceeding. If you have any questions, please call me at (907) 349-0100, or fax your comments to (907) 349-8001. Attachments -as noted 1"=200' I EXHIBIT A ENERGY INFRASTRUCTURE PRO.IECTS 1JTI.E: .'v-------------ATS 443 r-----------USS 2946, LOT 2 r-------USS 2946, LOT 3 r------USS 2946, LOT 13 r------USS 2946, LOT 138 ~-----USS 2946, LOT 6 .----~.-----USS 2946, LOT 7 .-----:~--USS 2946, LOT 13A tA;----~-ATS 442 / I I , '\ ~ \ /!;LFIN Cj 'V' , , ~ , '\ ~ SIoI" of Ala.ka O"porbpent of Community and EconomIc Oovelopment CERTIFICATE TO PLAT AREAS OF INTEREST ELFIN PLAN M 1 **a. AIDEA/AEA Rural Energy Group ALASKA 81l West Northem u!Jhte Blvd. r: ENERGY AUTHORITY * * ""ehoI'DOe. Nm.ko 99503 S.QUTHEASTERN TITLE AGENCY, INC. 210 LAKE STREET P.O. BOX 1223 SITKA, ALASKA 99835 Alaska Energy and Engineering, Inc. Steven J. Stassel, P.E. P.O. Box 111405 Anchorage, Alaska 99511-1405 Dear Mr. Stassel, PHONE: (907) 747-3278 FAX: (907) 747-3616 E-MAIL: STAI@PTIALASKA.NET PLAT CERTIFICATE Our Order Number: S-05-6720 Your File No. This is a Plat Certificate as of December 8, 2005 at 8:00 am for a plat on the following property: (See attached Exhibit 'A') This company hereby certifies that the record title is vested, as follows, free from any liens, encumbrances, and objections of record except as follows: VESTED IN: (See attached Exhibit 'B') SUBJECT TO: 1. Provisions and Reservations contained in the Patent from the United States of America. 2. Provisions and reservations as contained in the patent from the State of Alaska. Affects: Parcel # 1, # 2 3. This property is outside any taxing district. 4. Any adverse claim based on the assertion that any portion of the said land was not tide or submerged land subject to disposition by the State of Alaska on the effective date of the grant of said land, or that any portion thereof has ceased to be tide or submerged land by natural causes or imperceptible causes. (8) Rights and easements for commerce, navigation and fishery. (C) Any prohibition to limitation on the use, occupancy or improvement of the land resulting from the rights of the public or riparian owners to use any waters which may cover the land. Affects: Parcel#1,#2,#3 --(\r';.. 'i'G, ~1{!2., i'f!..;: 5. Plat Note: The natural meanders of the mean high water line forms the true bounds of Fuel Dock Subdivision. The approximate line of mean high water, as shown, is for area computations only. The true Fuel Dock Subdivision corners being on an extension of the sidelines and there intersection with the natural meanders. Affects: Parcel # 1 i '_. I ". l~:. 6. Declaration of Public Right of Way Recorded : July 2, 1999 Book/Page : 137/756 Affects Parcel # 2, #4, #5, #8, & #9 ".' . ",:." .-; . .,.. f .. ) /.!?I.-" )--'1 ........ : I.> EXCEPTIONS CONTINUED Page {PAGE} 7. Deed qftrust to secure an indebtedness of the amount herein stated and any other amounts payable under the terms thereof. Amount : $200,000.00 Dated : June 30, 2003 Recorded : July 8, 2003 Document No. : 2003-001672-0 TRUSTOR : COMMUNITY OF ELFIN COVE, a non-profit corporation TRUSTEE : SOUTHEASTERN TITLE INSURANCE AGENCY, INC. BENEFICIARY : ROBERT L. DUDLEY, Jr. and LESLIE DUDLEY, husband and wife Affects: Parcel # 1 ATS'll-\?.::;; 8. Deed of trust to secure an indebtedness of the amount herein stated and any other amounts payable under the terms thereof. Amount : $180,526.20 Dated : November 26,2002 Recorded : December 2, 2002 Document No. : 2002-002261-0 TRUSTOR : SHIRLEY and WILLIAM PERKINS, wife and husband TRUSTEE : FIRST AMERICAN TITLE BENEFICIARY : WELLS FARGO FINANCIAL ALASKA, Inc. Affects Parcel # 6 L?{ C, 9. Right, title and interest of the herein named party because of the circumstances herein noted. Party : SHIRLEY and WILLIAM PERKINS, wife and husband Reason : By being trustors on the deed of trust recorded 12/2/2002 as Document No. 2002-002261-0 Affecting Parcel # 6 1,0 T (, 10. Easement and Agreement for water use Dated : December 27, 1966 Recorded : May 15, 1967 Book/Page : 12/75 through 77 Affects Parcel # 7 and Parcel # 8 LOI "1 J 13A 11 . Land Use Permit Recorded : May 14, 1996 Book/Page : 120/778 through 785 Affects Encroachment of house from Parcel # 6 onto a portion of Parcel # 5 12. Encroachments, if any, of the dock, oil warehouse, and oil pipes on Lot 2 U.S. Survey 2946(Parcel # 4) or Lots 1 and 2 Plat 2002-6 (Parcel # 1), as shown on U. S. Survey 2946 13. Unrecorded Leases, if any I So...u1b.eastern Title Agency. #! (:~i)c~",~) ILK· Duane L. Kauffman .I END OF EXCEPTIONS EXCEPTIONS CONTINUED Page {PAGE} EXHIBIT "A" Order Number: S-05-6720 . ,'l \;(/ ,\", JpARCEL # 1 : Lot One (1) and Lot Two (2), FUEL DOCK SUBDIVISIOI'J, according to the plat :\ thereof filed February 4, 2002 as Plat No. 2002-6, Sitka Recording District, First Judicial District, State of Alaska. PARCEL # 2 : Lot One (1), ALASKA TIDELANDS SURVEY No. 442, according to Plat No. 57, Sitka Recording District, First Judicial District, State of Alaska . PARCEL # 3 : Tract A, ALASKA TIDELANDS SURVEY 1473, according to the plat thereof filed September 14, 2000, Plat 2000-12, Sitka Recording District, First Judicial District, State of Alaska PARCEL # 4 : Lot Two (2) , U.S. Survey 2946, Sitka Recording District, First Judicial District, State of Alaska PARCEL # 5 : Lot Three (3), U.S. Survey 2946, Sitka Recording District, First Judicial District, State of Alaska PARCEL # 6 : Lot Six (6) EXCEPTING THEREFROM the northwesterly 42 feet, U.S. Survey 2946, Sitka Recording District, First Judicial District, State of Alaska. PARCEL # 7: All of Lot Seven (7), U.S. Survey 2946, ALSO INCLUDING a portion of Lot Thirteen A (13A), U.S. Survey 2946, Sitka Recording District, First Judicial District, State of Alaska, more particularly described as follows; Beginning at a point on the common lines of Lot 7 and 13A from which Corner No.4 of Lot 13A and Corner No.1 of Lot 7, bears S 86°00'00' E 52.96 feet; thence S31°54'57" E, 17.38 feet; thence N 58°05'03", 24.00 feet; thence N 86°00'00' W, 29.63 feet to the point of beginning PARCEL # 8 : Lot Thirteen A (13A), U.S. Survey 2946, EXCEPTING THEREFROM, the portion more particularly described as follows; Beginning at a point on the common lines of Lot 7 and 13A from which Corner NO.4 of Lot 13A and Corner No.1 of Lot 7, bears S 86°00'00' E 52.96 feet; thence S 31°54'57' E, 17.38 feet; thence N 58°05'03",24.00 feet; thence N 86°00'00' W, 29.63 feet to the point of beginning, Sitka Recording District, First Judicial District, State of Alaska PARCEL # 9: Lot Thirteen (13), U.S. Survey 2946, Sitka Recording District, First Judicial District, State of Alaska LEGAL DESCRIPTION -continued PARCEL # 10: Lot Thirteen B (13B), U.S. SUNey 2946, Sitka Recording District, First Judicial District, State of Alaska VESTING EXHIBIT Order No: S-05-6720 PARCEL # 1, # 2, # 4, # 8: COMMUNITY OF ELFIN COVE, a non-profit corporation established and existing under the laws of the State of Alaska PARCEL # 3 & # 10: STATE OF ALASKA PARCEL # 5: ALASKA MENTAL HEALTH TRUST AUTHORITY PARCEL # 6 : SHIRLEY C. PIEDRA PARCEL # 7 : BARBARA J. BELL and DENNIS A. BELL PARCEL # 9 : ELFIN COVE EAGLE CHARTERS ALASKA, LLC. APPENDIX D ELECTRICAL DATA Elfin Cove Monthly kWh Generated 7 0000 ~'"~''''"'~''''~''''''''''''''''''''''''''''''''''''''''''''''''''''''''' .............. -.. -...... "" ... ~ ...................... " ...................................... w ••• "" ... • .•.•.• "' .• w ...... • .• • ........ · ...................... "" .... "" ....................... "" ............................... " .• " ................. , 60000+-----~--------------------------------------------------------~ 50000 II1II2001 c 40000 (!) 02002 (!) ~2003 I ~ 30000 []]2004 .2005 20000 10000 o Month D-1 Elfin Cove Peak kW Load 160 ~.~ .............................................................................................. ~ ...................................................................................................................... ,. ............ m ................ •• .. •• .. • .. •• .. • .. •• .... • .. • .. ••••• ........ • .. i 140+-~------------------------------------------------------------------~ 120 100 ~ 80 60 40 20 o ~<A ~<A ~--s ~--s )'1> «.~ Month 1DJ2001 02002 11.\12003 .2005 --.... ---....... ~-----------------------------------~---.... --------------------' D-2 Elfin Cove Average kW Load 100 ............................................................................................................................................................................................................................................................................. . 90 +-------------------------------------------------------------------~ 60 ~ 50 40 30 20 10 o Month D-3 .2001 02002 m2003 .2005 Elfin Cove Annual kWh Gen 410,000 400,000 390,000 380,000 c 370,000 Q) (9 ~ 360,000 350,000 340,000 330,000 320,000 2001 2002 2003 2004 2005 Year D-4 APPENDIX E DESCRIPTION OF HYDROELECTRIC PROJECT L. ~R lONE COMPANY .c-J.A. Many Solutions'" To: Steve Stassel, AE&E ..... Memo From: Bob Butera, HDR y~ Project Elfin Cove Hydroelectric Project CC: . J Date: December 15, 2005 Job No: 201662/34153 Introduction Alaska Energy and Engineering, Inc (AE&E) is performing a power and fuel facilities investigation for the town of Elfin Cove (Blfm Cove). A hydroelectric project was proposed for this community in the early 1980's. As part of this analysis AE&E requested HDR Alaska, Inc. (HDR) to: 1. Review existing available hydroelectric study information (April 1984 Supplement to the Elfin Cove Reconnaissance Study) and J.W. Bean data (to be provided later). 2. Determine availability of existing stream gauge data for nearby streams and adjust data to simulate available flows for Jims Lake and Crooked Creek. 3. Assess proposed hydro construction scenario and provide opinion of constructability and reliability. Provide recommendations for improvements to proposed construction. 4. Review proposed hydro construction cost estimate. Provide a budgetary construction cost estimate based on proposed improvements Fllilding for this work was very limited and therefore the extent of this analysis is cursory. 1. Review of Existing Information A Reconnaissance Study of Energy Requirements and Alternatives for Elfm Cove was prepared in February 1984 by a consultant on contract to the Alaska Power Authority (AP A). That report recommended a small hydro facility on Roy's Creek, a small creek in Elfin Cove. The APA later fOllild Roy's Creek not feasible and recommended a different small hydro facility about one mile south of the town. This project would use the c,?mbined flow from Crooked Creek and from the drainage basin of Jim's Lake. The APA prepared a report "Supplement to the Reconnaissance Study of Energy Requirements and Alternatives for Elfin Cove" in April 1984. This supplement focused exclusively on a hydroelectric project on Crooked Creek and Jim's Lake (Crooked Creek Project). The Roy's Creek project (and potential projects at 2 other small local streams, Ernie's Creek and Joe's Creek) was judged not feasible because long time residents had monitored the creek and stated that it was extremely flashy. It would essentially go dry during periods of dry or cold weather and would turn into a torrent during precipitation events. Based on review of aerial photography, the drainage basin of Roy's Creek appears to be steep bedrock with little vegetative cover. 1bis landform would result ill the reported stream conditions. Based on this we concur with the AP A finding that Roy's Creek would not be suitable for hydroelectric development. The Crooked Creek Project as proposed by the AP A would divert the flow from Crooked Creek to Jim's Lake. AP A reports state that Jim's Lake has a surface area of approximately 4 acres and is reported to be 24 feet deep. The Jim's Lalce drainage basin is very small, but APA noted that the lake could provide some storage to potentially allow the project to operate during normal HDR Alaska, Inc. 1 2525 C Sileel Sulle 305 Anchorage. AK 99503 I Phone (907) 644-2000 Fax (907) 644-2022 www.hdlinc.com I Page 1 016 winter and summer low flow periods. The APA Crooked Creek project has the following characteristics. Table 1: AP A Crooked Creek Hydro Project Characteristics Location Crooked Creek and Jim's Lake Capacity 80kW Gross Head 350 feet Net Head 330 feet Design Flow 4.5 cfs Flume 1650', 18", Aluminum CMP, lain on ground Penstock 2400', 12", HDPE Transmission Line 6700 feet, on ground Estimated Construction Cost $400,000 (1984 dollars including plant, t-line and distribution system in town) One of the recommendations of the AP A supplement was to collect at least one year of continuous streamflow records for the Crooked Creek proj ect. This streamflow data collection was initiated in July 1984 and is discussed in the Hydrology section below. Other recommendations were to confIrm the elevation of the project and to do a detailed reconnaissance of the flume, penstock and transmission line routes. A December 6, 1990 AEA memorandum from Eric Marchegiani addressed the project. This memorandum stated that there was a 1990 cost estimate of $532,000 to construct the project. This memorandum suggested the following steps to further this project: 1. Review and analysis of the collected streamflow data 2. Site visit and preliminary design to verify the constructability of the project and cost estimate. 3. Prepare an economic analysis 4. Prepare a financial analysis S. Initiation of permitting 6.. Finalize design 7. Finalize permits 8. Finalize fmancing 9. Construction manager 10. Construction contract A rough estimate for the above work was $571,000 including a 10% contingency. Elfin Cove now has a central diesel power plant and an electrical distribution system No other known work has been done regarding a hydroelectric project at Elfin Cove. 2. Hydrology The AP A estimate of power was based upon a rough estimate of streamflow made by comparing the drainage area of the Project with the unit discharge of other U.S. Geological Survey gaged streams on Chichagof Island. The AP A report recommended that stream gages be installed on Crooked Creek and on Jim's Lake and a year of data collected. HDR Alaska, Inc. 1 2525 C Street Suite 305 Anchorage. AK 99503 I Phone (907) 644-2000 Fax (907) 644-2022 www.hdrinc.com 1 Page2of6 This streamflow data collection was done by the Alaska DGGS. In a December 6, 1990 ABA memorandum it was stated that the DGGS collected l'l2 to 2 years of streamflow data (July 1984 to April 1986) but data for the period of July 6, 1984 to May 3D, 1985 was all that was found by Mr. Marchegiani in 1990 or at the time of this review. This data includes daily mean, minimum and maximum flow for the period of record at Crooked Creek and at Jim's Creek. There is also a combined daily discharge record for the combined Crooked Creek and Jim's Creek. sites. This combined data includes mean, minimum and maximum daily flows and also includes median daily flows. The methodology or quality of this data is unknown as there is no rating curve or summary of measurements. Of the 328 days of record, 66 days (20%) were estimated. Table 2 is a summary of this combined flow data. Table 2: Crooked Creek/Jim's Creek Streamflow Data Mean Minimum Maximum Median Year Month Flow Flow Flow Flow (cf& (efs) Jcfs) Jcfs) July 2.87 1.09 24.74 1.81 August 2.46 0.96 38.10 1.42 September 2.1l 0.76 19.26 1.18 October 2.94 0.89 32.28 1.29 November 1.95 0.76 26.38 1.18 December 2.74 0.59 17.82 1.66 January 4.33 0.96 38.74 3.01 February 1.94 1.81 2.65 1.86 March 1.35 0.72 3.87 1.18 I April 1.64 1.09 2.03 1.70 May 3.20 1.33 13.48 2.84 1984 July-Dec 2.48 0.59 38.1 1.42 1985 Jan-May 2.95 0.72 38.74 2.19 July 84-May 85 2.64 0.59 38.7 1.70 The closest USGS streamgage that was operational on ChichagofIsland in 1984 and 1985 was located on Tonalite Creek near Tenakee. It was located on the south side of Tenakee Inlet across from Tenakee, approximately 55 miles south of Elfin Cove. Comparison of this site to the project site is shown in Table 3. This comparison shows that the two basins have different aspects. The Crooked Creek basin is also much smaller, and has less forested area, two characteristics that would tend to make the flows flashier. Table 3: Comparison of Basin Characteristics for Crooked Creek and Tonalite Creek Crooked Tonalite Site Characteristic Creek/Jim's Lake Creek Drainage Area, square miles 0.55 14.5 Lake Area, percent 1 0 Area of Forest, percent 72 88 Range of Basin Elevation, feet 350 -2048 50-3075 Mean Basin Elevation, feet 1100 950 Basin Aspect west north The collected Crooked Creek/Jim's Creek streamflow data was converted to runoff (cfs per square mile) and compared to Tonalite Creek. This is shown in Table 4. HDR Alaska, Inc. 1 2525 C Sireet sune 305 Anchorage, AK 99503 I Phone {907} 644-2000 Fax (907) 644-2022 www.hdrinc.com 1 Page30f6 Table 4: Comparison of Runoff for Crooked Creek and Tonalite Creek Location Drainage Period of Record Mean Runoff Area Daily Flow (cfs/sq mil (sq mi) (cfs) Crooked Creek 0.55 July 6, 1984 -May 30, 1985. All data 2.4 4.4 Crooked Creek 0.55 July 6,1984 -May 30, 1985. Estimated 2.6 4.8 data not used. Tonalite Creek near Tenakee 14.5 1968 to 1988 98.3 6.8 Tonalite Creek near Tenakee 14.5 July 6, 1984 -May 30, 1985. All data 105 7.3 Tonalite Creek near Tenakee 14.5 July 6, 1984 -May 30, 1985. Estimated 95 6.6 data not used. Analysis of Table 4 shows that: • For comparable periods of record the runoff per square mile for Crooked Creek was approximately 70% of the nmofffrom Tonalite Creek. • The mean daily flow in Tonalite Creek for the July 6, 1984 to May 30, 1985 period was similar to the long term average at this station. It can be reasoned that the gage record at Crooked Creek represents an average year. A flow duration curve for Crooked Creek is shown below. This curve was prepared from 20 years of data from Tonalite Creek adjusted for drainage area and multiplied by 70% to account for the variation in nmoff between the two sites observed between July 1984 and May 1985. Flows above 5 cfs are truncated to improve the readability of the chart. -t; ;;:: ~ u... HDR Alaska, Inc. ODD ....,.,.,,=== 5DO 4DO 3DD 2DO 1DO o DO -F'-'==r Crookedl.Jim·s creek Flow Duration Curve O~ 10"' 20"' 30-' 4Il";t 50-' 00"' 70"' 80"'-go", 100"' % Exceedance 1 2525 C Street Suite 305 Anchorage. AK 99503 I Phone (907) 644-2000 Fax (907) 644-2022 lWIW.hdrinc.com I Page 4 016 3. Review of Project Layout and Constructability The genera11ayout of the AP A project appears to be practical although access considerations do not appear to be addressed. A four wheeler trail would need to be constructed from town to the powerhouse and to the intake and the diversion. A landing dock for powerhouse boat access may also be required. Depending on soils and slopes, an open channel between the diversion structure and Jim's Lake may be feasible and would save the cost of pipe at this location. The diversion structure and channel would be designed to limit flows and peak flows would be bypassed down Crooked Creek. The idea of using Jim's lake to provide storage to even out the flows from this small creek is a good one. Verification of usable volumes was not done as part of this review. The AP A report noted that the anadromous fish catalog did not include either of the project streams. HDR verified this, but non-inclusion in the catalog does not mean there are no fish in the streams. This would need to be field verified. A site reconnaissance would be necessary to confirm the viability of the remainder of the project. 4. Review of Estimate of Cost In 1984 the APA provided a sketch of the project and estimated costs for the project. The APA project had the following components and assumptions: • An 80 KW project was the most appropriate size for Elfin Cove, Project included power generation, transmission line to town and distribution system in town • 3 foot tatllog crib diversion structure • CMP or open channel flume to Jim's Lake. Estimated length x 1.4 for contingency. • Siphon from Jim's Lake • 12" HDPE penstock on ground surface. Estimated length x 1.4 for contingency. • Wood frame powerhouse • Pelton turbine • Power line lain along the ground from powerhouse to town. Estimated length x 1.4 for contingency. • Force account local labor with average rate, including fringe benefits of$20 per hour • Work completed mostly with hand tools • Access via trails, staging of materials with helicopter • 25% contingency factor. • Engineering not included. CM at $40,000, administration at $15,000. • FERC permitting costs not included • Agency permitting costs not included. • The cost estimate was completed March 1984. HDR has updated this estimate based on the following assumptions: • The concept project will be as recommended by AP A. • The original estimate and contingency factors by AP A are reasonable and accurate. HDR Alaska, Inc. 1 2525 C Sireet Sufte305 Anchorage, AI< 99503 1 Phone (907) 644-2000 Fax (907) 644-2022 www.hdrtnc.com 1 Page 5 015 • The project will pay force account wage rates. An average wage rate of $35 per hour including base wage, fringe, WC, and overtime @ seven 10-hr days/week was provided by AE&E as typical for rural projects. • The project will be constructed in 2005. • Inflation factor of 1.86 based on Engineering News Record construction cost index. (March 1984=4118, December 2005=7647). • Electrical distribution system costs will not be included. • Estimate does not include the costs of design, permitting, contract administration, construction fmancing, project financing, and construction management. With the above assumptions the estimated direct construction cost for the project is $600,000. Summary and Conclusions This project appears to be laid out in a practical manner. Almost one year of streamflow information has been collected during a year that appears to represent average flow conditions for this area. The data shows that this creek has a low but consistent streamflow. Future studies should include: 1. A reconnaissance investigation to determine project layout, access routes, verify elevations of project facilities and determine lake depth and volume. 2. An investigation to determination whether fish are present in Crooked Creek or the Creek that drains Jim's Lake. This may affect project feasibility and layout. 3. A feasibility study to select the optimum size of project component, determine the potential available power and estimate project cost and economic feasibility. HDR Alaska, Inc. 1 2525 C Sireel SuJIB305 Anchorage, AK 99503 I Phone (907) 644-2000 Fax (907) 644-2022 www.hdrinc.com I Page6of6 APPENDIX F MEETING SUMMARY LETTERS ,AlalkIIlndultrlal DewIopment and Export AutharIty May 4, 2005 Mary Jo Lord-Wild,CECNPC Vice-Chair Community of Elfin Cove Nonprofit Corporation P.O. Box 1 8flnCOve, AK 99825 A1 .. kII Energy Authortty 'Subject: 4114105 site visit, observations and recommendations Dear Ms. Lord-Wild: , , ,I have attached for your review a trip report and preliminary recommendations for the proposed energy intrastructure project in Eltin Cove. In order to keep the design ot this project on schedule, please provide comments tromresidents and interested parties on this 'report to me by August 1, 2005. -' I encourage you to also review the Denali Commission's poliCies and guidelines for energy projects. These are available on-line at wWw.denali.gov, or I can send them to you on request. , " Sincerely. ' " ' D~·~ David Lockard, P.E. Attachment: as stated, Co Steve Stassel, Alaska Energy and Engineering 813 WEST NORTHERN LIGHTS BOULEVARD· ANCHORAGE, ALASKA 99503 907/269-3000 • FAX 907/269-3044 • www.aldea.org TOLL FREE (ALASKA ONLY) 888/300-8534 Alaska Energy ~nd Engineering Re: Elfin Cove Energy Infrastructure Projects 4114/05 Trip Report & Preliminary Recommendations· On Wednesday April 13, 2005, David Lockard of the Alaska Energy Authority IRLIral . Energy Group (AEAlREG) and John Dickerson of Alaska Energy and Engineering . (AE&E) traveled to Elfin Cove. The purpose of our site visit was to meet with local residents to identify and discuss potential energy infrastructure projects within the community as well as to gather reconnaissance . level information for preparation of a Conceptual Design Report (CDR) for any identified projects. We anived in Elfin Cove by float: plane around noon. We proceeded directly to the· community building where we met with power plant· operator Jim' Lewis and tank fann . operator Jim Wild. After a tour of the power plant and fuel facilities a town meeting was 'held at 4:45 p.m., which was attended by ten local residents, including Community of Elfin Cove Nonprofit Corporation (CECNPC) Vice Chairperson Mary Jo Lord-Wild. The following summary report is based on preliminary Information gathered during this site visit. Ilincludes information and preliminary recommendations on: 1) Status of existing community power plant 2) Description of proposed power plant and distribution upgrades . , 3)· Status of existing community fuel storage facilities 4) Alternative energy This report along with comments from project participants will be the basis for the CDR. 1) Status of Existing Community Power Plant: The' existing power plant building is located on Lot 13A, U.S. Survey No. 2946, which is owned by the CECNPC.The community building (ex-school building) is also located on this lot, approximately fourteen feet from the power plant. The comer of the power plant building appears to be very nearty on or possibly over the property line shared with the adjacent boardwalk easement and is also less than ten feet from the Eagle , Charters Lodge building directly across the boardwalk. The lntemationalBuilding Code (leC) requires minimum fire separation distances between buildings· and public easements depending on use, occupancy and building construction. A preliminary analysis indicates that the power plant does not meet required fire separation distances and will need to be· relocated. Further investigation into this issue is required and a conclusion will be included in the Concept Design Report. There are three generators in the existing power plant, two of which are rated at 6Ok.W . and the third at 205kW. All of the generators are near the end of their useful lives. According to 1995 through 2003 peE data the average· annual load has ranged between 3B.OkW and 45.4kW .. Copies of daily power plant logs for the past three years were obtained during the site visit. The logs include a current demand reading taken approximately between 6 AM and 11 AM as well as a last 24· hour peak demand reading. An analysis of this data will be included in the CDR along with the proposed new generator capacities. . Elfin Cove Energy Infrastructure Projects . Preliminary Recommendations 2) Description of Proposed New Power Plant and Distribution Upgrades: It is our recommendation that the existing power plant be abandoned and replaced with· a new power plant module with generators sized to match existing community loads and to be located on community council property with adequate area to meet required setbacks anclfire separation distances. One possible location for the power plant is the area just to the north of the tank farm near the fuel dock. This site has barge access for . ease of placement and keeps the power plant out of the center of the community. . . . . . The proposed. power plant will include two peak rated generators and one smaller . nighttimeJwinter load rated generator, programmable automatic paral.leling switchgear, remote radiators with variable speed control, a fire suppression system, critical grade exhaust silencers, .an automatic fill day tank, a used 011 blender, a heat exchanger for generation heat· recovery, and all required engine coolant piping and ventilation equipment. It will come pre-assembled in a 14'-8"W X 38'-8"L modular skid-mounted building. Proposed power distribution upgrades include a new step-up transformer bank as well as additional meter bases and other upgrades on the dock to address current low voltage problems. 3) Status of Existing Community Fuel Storage Facilities: The existing tank fa"" was constructed new in 2000, is in excellent condition and, except for a few minor issues observed during this site visit, appears to be a code compliant facility. The CDR will include a complete code analysis of the fuel facility as well as a list of suggested upgrades and improvements. 4} Alternative Energy: The community building is currently served by generation heat recovery from the adjacent power plant. The new power plant location will be approximately 250' from the community building. This may make the heat recovery system installation marginally cost effective due to. the added distance and the lower generation heat recovery expected. A more rigorous analysis will be included in the CDR based on actual generator selections and power plant location. A final detennination of feasibility will be . . made atthat time. . " : . . . All available data regarding the potential Jim's Lake/Crooked Creek hydroelectric project, including infonnation gathered on our April 14, 2005 site visit, has been forwarded to hydroelectric generation specialist Bob Butera, P.E. of HDR, Inc •. for review. An analysiS of his findings and a preliminary cost estimate will be included in the CDR. No other potential alternative energy projects have been identified for Elfin Cove. . Please review the. issues presented and can David Lockard at 269-4541 to discuss or fax your comments to 269-3044. In order to keep the CDR on schedule we need to receive all community comments no later than August 1, 2004. I look forward to working.with you on this project. . . Sincerely. . A1 •• ka En~rtng.lnc. ~Cke~on . . Alaska Energy & Engineering Project Engineer . PaRe 2 of2 December 14, 2005 Sent by email to: (7 Pages Total) Alaska Energy and Engineering, Inc. P.O. Box 111405 Anchorage, AK 99511-1405 Phone (907) 336-8031 Fax 336-7527 David Lockard, AEA Project Manager dlockard@aidea.org Re: Elfin Cove Energy Infrastructure Projects Power Plant Site Investigation Dear Mr. Lockard, . The majority of community responses to the Elfin Cove Energy Infrastructure Projects . Preliminary Recommendations report issued in early May, 2005 indicate a desire to keep the power plant in its eXisting location rather than relocate it to a site near the tank farm as suggested in the report. Our initial concept was based on preliminary information that would have precluded the existing power plant from a potential renovation project due to inadequate property setbacks. Further investigation and discussions with the State Fire Marshall's office indicate that the existing power plant building can be modified to meet International Building Code (IBC) fire separation requirements. See attached Sheets M1 through M5 for additional information. 1) Power Plant Site Fire Separation Distances: The IBC requires minimum separations from buildings to a property line or the centerline of a public easement (fire separation distance) depending on occupancy, type of building construction and fire resistance rating of exterior walls. The power plant falls within mc occupancy group F-1 (Factory Industrial, Moderate Hazard), which includes electric light plants and power houses. The adjacent community building is currently used for public meetings, which falls under occupancy group A-3 (Community Halls). The adjacent Lodge falls under occupancy group R-1 (Boarding Houses & Hotels). For the purposes of this study it is assumed that all three buildings are non-fire rated construction throughout with no automatic sprinkler systems, which classifies them as Type V-B construction per the IBC. The following table summarizes the IBC fire-resistance rating and fire separation distance requirements for the previously mentioned occupancy groups of construction Type V-B only: FIRE-RESISTENCE RATING REQUIREMENTS (TYPE V-B CONSTRUCTION ONLY) OCCUPANCY OCCUPANCY OCCUPANCY FIRE SEPARATION DISTANCE GROUP F-1 GROUPA-3 GROUP R-1 (POWER PLANT) (COMMUNITY (LODGE) BUILDING) less than 5' 2hr 2hr 2hr greater than or equal to 5' 1 hr 1hr 1 hr and less than 10' greater than or equal to 10' and less than 30' Ohr Ohr Ohr The existing power plant entry/storage room encroaches into the public easement and is less than 5'-0" from the easement centerline. The IBC would require the walls and door in this area to be 2hr rated assemblies, which would be impractical to meet. Therefore it is proposed to remove the existing entry/storage room and relocate it so that it does not encroach into the public easement and is at least 5'-0" from the easement centerline, which would require only a 1 hr rated door and wall assembly. Elfin Cove Energy Infrastructure Projects Power Plant Site Investigation The proposed fire separation boundary as shown on Sheet M2 would be less than 10' from the walls of the existing lodge and community buildings. According to the State Fire Marshall's Office, this would not immediately impact these buildings. However, any future major renovations to the affected portions of these buildings would require a plan review and could require eXisting structural assemblies to. be improved to a .1 hr or 2hr rating at the time of the future renovation. 2) Heat Recovery: The community building is currently heated with generation heat recovery from the power plant. The relocation of the power plant to the tank farm property would have reduced .the efficiency of the heat recovery system and would have increased the project costs. The power plant renovation will include new generation heat recovery equipment if it proves economically justifiable. 3) Power Plant Noise Level: The noise level from the current power plant is acceptable to the community, largely due to the extensive use of pre-formed concrete walls in the existing building. The proposed renovations to the existing power plant should maintain or reduce the noise level. Improvements will include additional drywall in the exterior wall of the entry room and an upgrade to hospital grade silencers on all three engines. All new ventilation openings will utilize sound linings within interior and exterior ducts and will be located to minimize noise transmission. It is difficult to predict the community noise level impact of a new modular power plant located at a site near the tank farm due to the unknown sound characteristics of a new location and the foam sandwich panel construction of the module. 4) Emissions: The soot level from the new generators will be better than the existing generators due to advances in engine technology. New automatic paralleling switchgear will allow for better matching of online generation to community demand, which will also improve emissions. With continuous preheat, offline generators can be brought online by the new switchgear in less than thirty seconds. This will eliminate the sudden demand problems experienced with the prior generation automatic paralleling switchgear. These improvements will be the same regardless of the power plant site selected. 5) Project Costs: The estimated installed cost of a new modular power plant in El'fin Cove is approximately $1,200,000, including a 20% contingency. It is estimated that renovation of the existing power plant will reduce the cost of the project by at least $200,000. 6) Conclusion: A renovation design for the existing power plant appears to be technically feasible. Prior to developing the CDR for a renovation project we need confirmation from the community that this is the preferred option. It should be noted that the construction of either option is contingent upon future construction funding availability. Renovating the existing power plant rather than installing a new power plant module is likely to reduce the total project cost and improve the chances of funding for and operation of the heat recovery system. However, a disadvantage to using the existing building is that the new switchgear would remain in the same room as the generators rather than in a separate control room. Sincerely, Alaska Energy & Engineering John Dickerson Project Engineer SEE SHEET M5 --"(\ FOR PROPOSED MODULAR POWER PLANT PLAN 1"=150' PRO.IECT: ELFlN COVE ENERGY INrRASTRUCTURE PROJECTS COMt.4UNITY SITE PLAN DESIlN!D BY: FU: twlE LFIN-"1 SCo\l£: 1"= 150' SHEET Of M1 5 , , '\ , /~ SEE SHEET M4 FOR PROPOSED POWER PLANT RENOVATION PLAN /,'/\ ,'/ \'\ / I / / I I . DeparIQMont ." Com="'" ~Ic DeYeIopmont * ~. ,,·AIOEA/AEA * Rural Eii.iV Gtoup ALASKA .'3 w.t NcwtIwn lJght8 ... /E,ENERGY A.U'THORITY * -.-...... I I ~==========~r-PO-RTI~~~--~ OF : ,,~ APPROX. LOCATION OF EXISTING I ~ ./ EXISTING PROPERTY ENTRY/ "~LlNES, TYP STORAGE " AREA : ~ LODGE R-1 OCCUPANCY WOOD FRAME ENCROACHING I INTO PRE-CAST, PUBLIC CONCRETE, EASEMENT : & WITHIN 5' OF CENTERLINE / WOOD FRAME CHASE AROUND EXHAUST RISERS TO BE REMOVED i g;S:~~~~C POWER PlANT F-1 OCCUPANCY PROJECT: ElfiN COVE tRAWN BY: ENERGY INF'RASTRUCTURE PROJECTS DESIGNED BY: flll: NIK LFIN-M2 POWE~ PLANT EXISTING SITE/DEtotOUTION PLAN PRE-CAST CONCRETE "--RADIATOR SHED TO BE REMOVED COMMUNITY BUILDING A-3 OCCUPANCY WOOD FRAME CONSTRUCTION stILE: ,"= , o· Ml!: SHEET Of M2 5 1"=10' : / EXISTING PROPERTY ----1 LINE, TYP -r I ~" I I ~ LODGE R-1 OCCUPANCY WOOD FRAME i --~ ~ PROJECT; f- Z w :::i: w ~ u ::::JI CD ~ 0... u... o w z ~I ~ z w u ELFIN COVE ENERGY INFRASTRUCTURE PROJECTS POWER PLANT PROPOSED FIRE SEPARATION PLAN 1HR CONSTRUCTION REQUIRED, INTERIOR WALL PROTECTION ONLY COMMUNITY BUILDING A-3 OCCUPANCY WOOD FRAME CONSTRUCTION DRAII'I II't: 5C.Il£:1"= 10' D~B'f: DlI!: ALENN.E SHEET OF LFIN-t.l3 M3 5 o TO 5' FROM POWER PLANT I; IMAGINARY I PROPERlY LINE, lYP 1"=10' ~---------16'--~----~~ AUTOMATIC FILL 100 f GALLON DAY TANK ........... , .................. ,., ...... , ....... "_ ..... , .... -----------r- FIRE SUPPRESSION CONTROL PANEL~ D Il GENERATOR #3, 64kW G ~ I" #1 HOSPITAL GRADE-./ '. :. .1--/ SILENCER, TYP(3) EF -1 ~ ~ x GENERATOR #2, 110kW I ;:_ ~ G ~ I >--/ GENERATOR #1, 190kW I : RELOCATED ~,~ -.... ------FIRE SUPPRESSION ; ~ R-2 ....l...--_ L.::::::::~=~6=~=1=GE==~·:~ AGENT .R .. A ... C.K .............. 1..,,-.. i'.:,.=.} .. ,:,: r-m fD ~ 6-6" -:iMA;I~7 ~. ~~~~~ ~ nllJ PARALLELING PANEL & SWITCHGEAR TRANSFORMER PROJECT: ELFIN COVE DRAWN Br: BeG SCIU: 3/16'=1' ENERGY INFRASTRUCTURE PROJECTS DESlIJIIlI BY: BCG DAm SII£ET OF POWER PLANT RENOVATION PLAN ELFIN-t.l4 M4 5 to I 10 N co I 1-1 .. ------15' -8" -------11 {J-----(CONTROL ROOM J D~DAY TANK o GENERATOR #1, 190kW [ o o AUTOMATIC PARALLELING SWITCHGEAR FIRE SUPPRESSION CONTROL PANEL FIRE SUPPRESSION AGENT RACK PANEL SS-1 D4=====lWITH STATION SERVICE TRANSFORMER BELOW o o RADIATOR VFD CONTROL PANELS RADIATOR, 1YP(2) "x/ 1-.. ---VENTILATION ~/_"....::.I..-J~ HOOD, 1YP(4) SCU: 3/16"=1' PRC>J£CT: ELFI N COVE DRAWN BY: 8eG f-;;;-;:_EN_E_RG_Y_I_NF'_RA_S_TR_U_CT_U_RE_P_R_OJ_E_CT_S_----r.;I]fl;«HJ)~.;::;BY::..::;8CG::::....--+-;;IJIIire;;".,...--~ • l if· ~AiT> .~- 1I11E: ru: !WE SHEET OF * Rural £no Group III ALASKA GENERATOR t.tODULE PLAN ELF'IN-M5 M5 5 * .'~""".;..~...... ENERGY AlJTHOfl'TY From: "Gordy Wrobel" <gordywrobel@covelodge.com> To: "john dickerson" <jdickerson@acsalaska.net>; "david lockard"<dlockard@aidea.org> Sent: Saturday, December 24,20057:14 AM Subject: Elfin Cove Powerhouse Site Selection David Lockard and John Dickerson, We have solicited input from our community concerning the generator plant site proposal you developed. We gathered input via person-to-person conversati on, telephone and emai I. The process used to reach the recom mendation below was inclusive of more community members than typically participate in our formal meetings. The Board believes that a clear position on the matter has been reached and that this pos ition reflects the opinions and wishes of a large majority of the community members. Of those partic ipating in this process a clear majority indicated that we shoul d make improvements to the existing site. There were 3 major concerns regarding this site and it is hoped that the final design can specifically address each of these poi nts. Given that the estimate for the current site is $200,000 below the alternative site, it is hoped that some of these savings may be used to address each of the following: 1. Fire. Both sites raised this concern. The community would like the planning process to explore redund ant systems or other means of fire prevention, containm ent and abatement. 2. Noise. Given that the current location is in the heart of the community and with proximity to other buildings and the boardwalk we request the design to include effective noise dampening strategies beyond just mufflers and resonators. 3. Emissions. Given the location and proxim ity to other buildings there should be speci al attention given to emmisions for obvious reasons. We assume new engines wi II reduce the current problem but we would like to explore additional measures to further reduce emissions. On behalf of the Com munity of Elfin Cove, and its Board of Directors I want to thank both of you for supporting us in this effort. T his component of our energy plan is vital to our community at this time. We would like to assist you in any way we can so that the work can be com pleted as soon as possible. We remain committed to developing alternative renewabl e energy resources. Any assistance you might provide with our alternative energy efforts wi II be greatly appreciated. Sincerely. Gordy Wrobel, Chair Community of Elfin Cove Non-Profit Corporation December 30,2005 Sent by email to: (1 Page Total) Alaska Energy and Engineering, Inc. P.O. Box 111405 Anchorage, AK 99511-1405 Phone (907) 336-8031 Fax 336-7527 David Lockard, AEA Project Manager dlockard@aidea.org Re: Elfin Cove Energy Infrastructure Projects Power Plant Design Concerns Dear Mr. Lockard, Based on the December 24, 2005 e-mail from Elfin Cove Community Association Chairman Gordy Wrobel titled "Elfin Coye Powerhouse Site Selection", we will now proceed with a conceptual design for renovation of the existing power plant building as part of the Energy Infrastructure Upgrade Projects CDR. In the conceptual design we will address the three major community concerns as follows: 1) Fire: The renovated power plant will contain an automatic fire alarm and water mist fire suppression system. This will be an improvement over the eXisting facility since there is currently no fire suppression. 2) Noise: The eXisting critical grade silencers will be replaced with interior mounted hospital grade silencers. The hospital grade silencers provide maximum noise reduction at the exhaust outlet. Placing all of the silencer shrouds inside the concrete building structure will maximize resonant sound absorption. All three exterior exhaust stacks will be routed up to a height of approximately 20' above grade. Sound attenuation will be provided at all building penetrations and combustion/ventilation air openings, with all openings located to minimize the noise impact on nearby buildings. The proposed small (64kW) winter load genset will be the prime genset for approximately eight months out of the year. This unit will be powered by a marine jacketed (water cooled exhaust manifold) engine to provide for additional generation heat recovery. The marine jacket will also significantly reduce the noise level of this genset. 3) Emissions: The existing generators are not EPA certified for low emissions. The proposed new generators will be at least EPA Tier I certified and the new marine jacketed (64kW) generator will be EPA Tier" certified. These certifications are not required for small power plant installations like Elfin Cove but will guarantee that the new gensets meet Federal emissions standards. Due to advances in engine technology these new EPA certified gensets will be more efficient and will produce lower emissions than the existing units. Raising the exhaust stacks and necking down the stack at the tip to increase velocity will also allow for better dispersion of the exhaust plume and decrease the impact of emissions near the power plant. These improvements, in addition to the new automatic paralleling switchgear and improved power plant ventilation, will all have a positive effect of reducing emissions. Proper maintenance of the generators will be necessary to ensure long term clean operation of the engines. Sincerely, Alaska Energy & Engineering John Dickerson Project Engineer