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HomeMy WebLinkAboutChester Lake Dam Replacement Project 1984Approved Approved Approved MANAGEMENT PLAN CHESTER LAKE DAM REPLACEMENT PROJECT METLAKATLA, ALASKA ALASKA POWER AUTHORITY 334 West 5th Avenue Anchorage, Alaska ~ ~~ ~? Adopted by Board of Directors -December 13, 1984 6044/302/D3/1 . -., • J' ..• . J ' ,. • •"\ . ,··~ • /. \ .'' , .. ' \ I . \ . ''-_) ,_, t.·-.:~···, ~·e~; .. ,., '·'·' .. "I .._ .. -:r. !" \ . ""' •• J ~~ I\ 4-••• / \ ·, .. ~~··' ...... \ .r> '·, ~\. ' ·. '-, \ .... ._ .. \ ' ...... , 0.. ~ c:: 0 •.-4 ~ C1l u 0 ,..J ~ u Ill .,.., 0 1-4 ~ ....... 1 N Ill 1-4 :::l 00 •.-4 ~ .... m m .... >-2 4 (l ~ 0 u · (.9 z [ w w z ·, (.9 z ··w · CHESTER LAKE MANAGEMENT PLAN TABLE OF CONTENTS SECTION TITLE I PURPOSE OF MANAGEMENT PLAN II GENERAL PROJECT INFORMATION III PROJECT MANAGEMENT CONCEPT IV ORGANIZATION AND STAFFING v SCOPE OF WORK VI DESIGN MANAGEMENT VII CONSTRUCTION MANAGEMENT VIII PROJECT TRANSFER IX PROJECT MILESTONES X PROJECT COST ESTIMATE 6044/302/D3/2 1-1 SECTION I CHESTER LAKE MANAGEMENT PLAN PURPOSE OF PROJECT MANAGEMENT PLAN This project management plan provides the project management guidelines; anticipated project costs; schedule milestones; organizational staffing; and the design and construction management procedures which will be followed during the construction of the Chester Lake Dam. Managers will be required to develop detailed procedures for specific project activities in accordance with the policies and general guide- lines outlined herein or those which will be provided by future updates of this plan. Other detailed procedures implementing the policies and general guidelines set forth in this plan will be developed by the Power Authority. 6044/302/03/3 Page 1-1 SECTION I I CHESTER LAKE MANAGEMENT PLAN LOCATION AND HISTORY 2-1 GEOGRAPHIC LOCATION AND LAND OWNERSHIP Chester Lake is located on Annette Island, approximately 20 miles south of Ketchikan and two miles east of Metlakatla, Alaska. (See Project Location Map, Figure 2-1). The existing Chester Lake Dam was constructed in 1927 and in the 1930's the dam was raised to a height of 21 feet. The lake serves as the potable water supply for Metlakatla. The surface elevation of the lake is 845 feet. The drainage area is a scant 1.62 square miles. Chester Lake and its environs are located within the Annette Island Reserve and are under the jurisdic- tion of the Metlakatla Indian Community. The Reserve was created by an act of the U.S. Congress in 1891 and comprises the entire 134 square miles of Annette Island. 6044/302/D3/4 Page 2-1 2-2 HISTORY The Power Authority initiated a feasibility analysis of a hydroelectric project for Chester Lake in 1981. The project called for the replacement of the old dam with a larger new dam. In 1983 the Legislature authorized the Power Authority to construct the Chester Lake Hydroelectric Project for $13.2 million under the Energy Program for Alaska, however, no funding was appropriated. Due to uncertainties in the financing and timeliness of redeveloping a hydroelectric generation facility at Chester Lake, the Metlakatla Indian Community and the Power Authority have not finalized any power sales agreements for the project. Updated load forecasts completed in 1984 indicated that several other electrical system improvements and some conservation measures directed at electric space heating may be warranted before finalizing a schedule for new generation facilities at Chester Lake. These items will be addressed in an update of the feasibility report to be available in early 1985. In any event, due to the deteriorated condition of the old dam, community leaders became concerned about the water supply and the effect that its loss would have on the health and welfare of the populace. They petitioned their legislators for the funds to repair the dam. As a result, the Legislature appropriated $100,000 in HB 691 to the Department of Community and Regional Affairs for temporary repairs of the dam consisting of caulking and bracing. These repairs were completed in September 1984. In 1984 an additional $3.3 million was appropriated in SB 409 to the Power Authority for construction of a replacement dam of a design which would be compatible with future hydropower development of the project. 6044/302/D3/5 Page 2-2 3-1 INTRODUCTION SECTION III CHESTER LAKE MANAGEMENT PLAN PROJECT MANAGEMENT CONCEPT The basic project management phases of the Chester Lake Dam Replacement Project are the Design Phase, the Bid Solicitation, the Evaluation and Contract Award Phase, and the Construction Phase of the project.. Project management concepts include systematic activities of planning, implementation, and control needed for successful completion of the Chester Lake Dam Replacement Project. The project concept is to coordinate the activities of the project participants to ensure that the project is completed to specification, on schedule and within budget. 3-2 POLICIES RELATIVE TO PROJECT MANAGEMENT The Power Authority has flexibility in determining the relationship of the organizational elements of the project. For this project the design will be accomplished by an engineering consulting finn while the Power Authority staff will perform the overall project management including the construction management functions. A single construction contractor will accomplish all procurement and construction. The responsibility for management of the project, including design, will be transferred from the Power Authority's ·Planning Division to Projects Division upon initiation of the design. Upon completion of construction, ownership of the project will be transferred to the Metlakatla Indian Community which will be responsible for project operations and maintenance. 3-3 STAFFING REQUIREMENTS The major day-to-day project participants are the Power Authority's Project Manager and Construction Coordinator, the Design Engineer's Project Manager and Onsite Engineer, and the Construction Contractor. The Power Authority staffing requirements will be a part-time project manager, a full-time construction coordinator during construction, part-time support by a cost scheduler and contract administrator, a project accountant and necessary clerical support. All personnel requirements can be met within the current level of staffing of the Power Authority. 6044/302/D3/6 Page 3-1 3-4 PROJECT PARTICIPANTS The key participants in the Chester Lake Dam Replacement Project will be the Alaska Power Authority Board of Directors, the Alaska Power Authority staff, the Metlakatla Indian Community, the Design Engineer and the Construction Contrac- tor. The Federal Energy Regulatory Commission (FERC) is not a participant at this time since this project does not involve power generation. 3-5 THE ALASKA POWER AUTHORITY BOARD OF DIRECTORS The Board exercises broad, general control over the Power Authority staff and establishes general policies for project development. The Board will review and endorse the Project Management Plan which will authorize the Power Authority staff to proceed with the final design of the selected configuration and to solicit bids and award a contract for the construction of the project. Since there will be no construction of power generation facilities, there is no requirement for conditional power sales contracts with the Metlakatla Indian Community. 3-2 STAFF OF THE ALASKA POWER AUTHORITY It is the responsibility of the staff of the Power Authority to implement the Board of Directors policies, establish internal and external management control, and provide an adequate number of trained personnel to ensure that the project is constructed to specification, within budgeted cost and on schedule. The Project Manager for this project is responsible for the administration of all design and con- struction operations associated with the project except for the construction safety program which is the responsibility of the construction contractor. The Project Manager will also serve as the chief point of liaison with the Metlakatla Indian CoDlmunity. The Construction Coordinator will be the onsite representative for the Power Authority through the con- struction phase. He will provide assistance to the Project Manager for the administration of the construction contracts, and will perform the quality assurance function during con- struction. Prior to construction he will assist in the review of contract plans and specifications. 3-6 METLAKATLA INDIAN COMMUNITY The ~etlakatla Indian Community has sovereign jurisdiction over the land and water resources of Annette Island. Prior to initiation of construction, an agreement between the Power Authority and the ~1etl akatl a Indian Community wi 11 be neces- sary. This agreement will provide the right-of-entrys necessary for construction and will provide for the transfer 6044/302/D3/7 Page 3-2 of ownership and O&M responsibility for the project to the Community upon completion of construction. A Waiver of Sovereign Immunity or similar vehicle will also be required from the Community to allow State inspection of the completed dam under the State Dam Safety Program administered by the Division of Land and Water Management, Department of Natural Resources. Coordination with the Community will be required for site access for prospective bidders and for the access of contrac- tor personnel, equipment and material. While the Community will not be directly involved in the bid evaluation and project management, periodic priefings would be conducted to keep the Community advised on project developments plus provide a means for Community input on the project. Upon completion, the Community will assume the responsibility for the operations and maintenance of the permanent project facility .. The Power Authority will provide the necessary start-up trai~ing and operations manuals for the Community. 3-7 DESIGN ENGINEERING Due to the deteriorated state of the existing dam, it is imperative that the construction of the replacement dam be accomplished during the 1985 construction season. Consequent- ly there is insufficient time available to implement the normal RFP process of soliciting proposals in order to select a design firm for this work. The possibility of utilizing a two-step design/construct bidding procedure was considered, however, this is also too time consuming to complete construction during the 1985 season. The design of this project will, therefore, be accomplished by utilizing Harza Engineering Co., the engineering firm which prepared the feasibility studies for Chester Lake and is currently still under contract with the Power Authority. Although Harz a 1 s contract is presently only for the feasibility study work, the RFP under which this firm was selected and the contract itself provided for the possibility of design, preparation of plans and specifications, and construction management services for the project. Harza Engineering was selected on the basis of the entire RFP and is considered we 11 qua 1 i fi ed to accomp 1 ish the added work. A contract amendment will be negotiated to accomplish the design portion of this project and to assist the Power Authority during the construction phase. The design work to be accomplished will be limited to that which is necessary to maintain the Community•s potable water requirements and to provide for compatible with future expansion into a hydroelectric generation facility. Design of 6044/302/03/8 Page 3-3 the complete dam, powerhouse, penstock and transmission lines will not be part of this contract. The Design Engineer will prepare the plans and specifications for the construction contract and will assist the Power Authority in the bidding and contract award process. During construction they will provide an onsite full-time engineer to resolve any design related problems and to assist in the administration of the construction contract. The Design Engineer will prepare as-built drawings for submission to the Power Authority upon fi na 1 acceptance of the dam. They wi 11 also prepare the operations and maintenance manual for the dam and present an orientation/training session to the Community's operations personnel prior to transfer of the project. 3-9 CONSTRUCTION Construction of this project will be accomplished through the use of a single construction contract. The contract will be awarded through the use of state competitive bidding proce- dures. The contractor will be responsible for procurement of all permanent project materials as well as all construction required to complete the project. Additionally, the contrac- tor will be responsible for: Quality Control and testing; jobsite safety; transportation to and from the jobsite; establishing and operating construction camps, as necessary; and maintaining the supply of potable water to the community during construction. 6044/302/03/9 Page 3-4 4-1. INTRODUCTION SECTION IV CHESTER LAKE MANAGEMENT PLAN ORGANIZATION AND STAFFING This section defines the project team organization and out- lines the systems and policy guidelines upon which the project management approach is based. 4-2 ORGANIZATION AND STAFFING APPROACH TO CHESTER LAKE PROJECT The internal matrix organization which will be used to manage the Chester Lake Project is depicted in Figure 4-1. This organization chart was developed to meet the specific project needs of the Chester Lake Dam Replacement Project. The solid lines on the organization chart indicate functional relation- ships as defined in the Power Authority organization. The dashed lines represent relationships between project team members either on a full-time or part-time basis. The focal point of the Chester Lake matrix organization is the Project Manager. The Project Manager wi 11 directly manage project activities and provide the nucleus of supervision, 1 i a i son, coordination, and communication between a 11 interna 1 and external participants in the project. The Project Manager will define and clarify all parties' roles and responsibil- ities. In the matrix organization, the day-to-day supervision of the project staff will shift from functional managers to the Project Manager. For instance, the Cost Scheduler will be supervised by the Project Manager (dashed 1 i ne} rather than the Director of Administration (solid line). The Project Manager must provide highly visible guidance and leadership of all project activities on a continuing basis. Implicit in this leadership is the requirement that standards and procedures of all parties involved in the project be respected. The Project Manager will be ultimately responsible for ensur- ing compliance to the policies and project guidelines set forth in this plan. Additionally, the Project Manager will be responsible for continually re-evaluating the scope of project work to be performed by the contractor and conveying direction if necessary to all parties. The Project Manager will define the integration of other organizations outside the Power 6044/302/03/10 Page 4-1 Authority Project Management Team and will formally define organization interfaces. The Project Manager will a 1 so be responsible for coordination and liaison with the Metlakatla Indian Community. 4.3 PROJECT TEAM The Project Team will consist of the following members: 0 0 0 The Project Manager will have the responsibility of managing and coordinating the activities of all project participants and the design and construction contractors. The Project Manager will have the authority and responsibility to develop, approve and enforce procedures used in execution of project functions and will be responsible for the identification and resolution of problems and solutions to problems which impede project completion or increase the risk of cost overruns and technical deficiencies. He will also perfonn the Construction Management Function by directing administering and managing the construction contract. The Project Manager will report to the Director of Construction. The Construction Coordinator will be the Power Authority representative on-site and will provide a liaison and communication interface to the Project Manager located in Anchorage. He will monitor construction progress at the project site and assist the Project Manager in the administration and management of the construction contract. The Construction Coordinator will anticipate and identify field problems and relate them to the Power Authority Project Manager. The Construction Coordinator will provide onsite direction to the construction contractor through coordi~atio~ with the Project Manager, and will assist the Project Manager in estimating and negotiating required contract changes. The Construction Coordinator will a 1 so be the Power Authority • s Qua 1 ity Assurance Manager during construction and will perform QC audits of the contractor•s quality control functions and witness critical testing. The Construction Coordinator will report to the Project Manager. The Cost Schedule Controller will maintain the cost schedule system for the Chester Lake Project. The controller will be located in Anchorage and will monitor project costs and schedule progress and variances to projected cost and schedule forecasts. The cost schedule controller will prepare monthly project reports on costs and schedules. The controller will be responsible for monitoring changes to breakdown of contract work and will 6044/302/03/11 Page 4-2 0 0 be responsible for monitoring project costs and schedu 1 es. The centro 11 er wi 11 report to the Project Manager and the Director of Administration. The Contract Administrator will be responsible for contract administration support functions. The contract Administrator will establish and maintain contracts files; process and expedite pay estimates and change orders following approval by the Project Manager; draft correspondence pertaining to contract issues; and attend and record contract meetings such as contract negotiations, project review meetings and claims negotiations involving Power Authority personnel. The Contract Administrator will report to the Project Manager and the Director of Administration. The Project Accountant wi 11 provide project support functions such as processing pay requests through the State accounting system and general ledger financial statements. Finance and Administration personnel wi 11 report to the Project Manager and the Associate Executive Director of Finance/ Administration. 4.4 DEVELOPMENT OF PROJECT STANDARDS AND PROCEDURES The development of standards and procedures for all aspects of the Chester Lake Dam Replacement Project will be the ultimate responsibility of the Project Manager. The Design Engineer will develop the functional procedures for activities which will occur within his organization. In all cases, the Power Authority Project Manager will be responsible for reviewing, revising, and approving contractor-developed procedures. For a delination of Power Authority procedure responsibilities for all aspects of the Chester Lake Project, please see Table 4-1. 6044/302/D3/12 Page 4-3 t4JI FUNCTIONAl SUPERVISION FIGURE 4-1 p AlASKA POWER T AUT~OIHTY E!CECUTIVE OIRECTOR I I I ASSOCIATE EXECUTIVE AS SOC I ATE EXECIJTI VE ASSOCIAH EXECUTIVE ASSOCIATE OIRECTOR. PROJECTS OIRECTOR, OPERATIONS OI~FCTOR, PLANNING EXWJTIVE OIRECTOR I -FINANI:E O!RECTOR CONSTRUCTION DIRECTOR AOMINISTRATION I PROJECT MANAGER -------r-- - --------- ---~------__ _..._ -~------------r- I I I I I I CONSTRUCTION COST CONTRACT PRO,JECT MANAGF.R • PROJECT COOROINATOR SC~EOUlER AOMINISTRATOR FHSIRILITY Af.f.OIJNTANT ·,~,:: ... TABLE 4-1 RESPONSIBILITY CHART PROCEDURE TITLE Bid Solicitation Bid Evaluation Contract Preparation Project Team Organization, Interfaces, Communications, and Functional Responsibilities Document Control/ Project History Contract Compliance Cost and Schedule Control Cost Estimating Project Accounting Quality Assurance/ Quality Control As-Built Drawing Control Submittal Processing Constructability Reviews Change Order Processing Construction Contract Administration Project Reporting Safety Reviews Communications 6044/302/13 RESPONSIBLE ALASKA POWER AUTHORITY MANAGER Project Manager Project Manager Project Manager Project Manager Project Manager Project Manager Cost Schedule Controller Projects-Director of Engineering Project Accountant Construction Coordinator Project Manager Project Manager Project Manager Contract Administrator Contract Administrator Project Manager Construction Coordinator Construction Coordinator Table 4-1 5-l GENERAL SECTION V CHESTER LAKE MANAGEMENT PLAN SCOPE OF WORK The construction to be accomplished under this project manage- ment p 1 an wi 11 be limited to the dam itself and nat the construction of a complete hydroelectric facility. Senate Bill No. 409, as enacted by the governor, reads: Sec. 274. The sum of $3,300,000 is appropriated from the general fund to the Alaska Power Authority far the Chester Lake Dam repairs and construction. This funding appropriation was intended to repair or replace the existing Chester Lake Dam an an expedited basis in order to protect and maintain the community's potable water supply. It was further intended that any construction work accom- plished be designed such that it would be compatible with possible future hydro power development of the site. 5-2 WATER STORAGE REQUIREMENTS The existing dam was originally used as a hydropower project and as a source of potable water for the Community of Metlakatla. In 1956 the powerhouse was abandoned and the project was used solely far water supply purposes. The current spillway elevation of the dam is approximately 845 ft MSL and maintains the reservoir lake at this level except during periods of low runoff. Historical data on water consumption rates far the Community are essentially nan- existent, however, it is known that at times the water level in the reservoir drops several feet below the spillway ele- vation. Although residents cannot recall having run aut of water, the Community has expressed serious concern about such a possibility. Construction of a replacement structure should, therefore, as a minimum sustain the current reservoir storage capacity with a spillway elevation of 845 ft. MSL. 5-3 COMPATIBILITY WITH FUTURE HYDROPOWER DEVELOPMENT The feasibility of Chester Lake as a hydropower site has been addressed by twa separate studies. The first of these was prepared by R. W. Retherford Associates in 1977. The second 6044/302/14 Page 5-l is the feasibility study being prepared by Harza Engineering for the Power Authority. The feasibility reports show that Chester Lake can be developed as a hydropower project either on a small scale as a run-of-the-river project; or, on a larger scale involving water storage and controlled release. Thus, depending upon the ultimate level of hydro development, the crest elevation of the dam structure varies substantially. For a storage/release project the recommended dam has a spillway crest elevation of 885 ft MSL, while the minimum spillway elevation for a run-of-the river project is 845 ft MSL. The current water elevation behind the existing dam is 845 ft MSL which is the minimum acceptable storage capacity to maintain the community's year around potable water supply. The dam to be constructed must, therefore, maintain the minimum water storage requirements and allow for the various options of future hydropow.er development of the site. 5-4 DESIGN OPTIONS The current level of funding is sufficient to meet the immedi- ate needs of protecting the community's water supply, however, it is insufficient to construct the entire dam for the maximum hydropower development scenario. The dam to be constructed with the current appropriation must, therefore, be built in such a manner as to allow for future expansion (i.e. raising), or be bu i 1 t such that it will not interfere with future hydroelectric expansion. To achieve the intended goals at Chester Lake within the current funding level there are three possible design options available. These are: Option 1: Repair the existing dam to maintain the Community's potable water source and to provide compatibility with future development of a hydropower dam. Option 2: Construct a new dam which is designed to allow for expansion and will become an integral part of a larger hydropower dam. (See Figure 5-1) Option 3: Construct a new dam of an interim design which will maintain the potable water supply and accommodate run-of-the river development but must be replaced if maximum hydro development is chosen. (See Figure 5-2) Each of these scenarios has recently been reviewed as part of the project feasibility study. The results of these eval- uations is summarized below. 6044/302/15 Page 5-2 Option 1: Repair Existing Dam The repair of the existing dam, although feasible, is not recommended for the following reasons: a. The integrity of the existing structure is unknown. The structure was built in 1927 and neither the design drawings nor the specifications can be found. Due to it's questionable strength, repairs to the structure would have to be of such a magnitude as to provide the full required dam strength, thus rendering the existing dam of no value. b. Repairing the existing structure would require either a near complete draw down of the lake or construction of a separate coffer dam upstream. Complete draw down of the lake is unacceptable as the lake is the community's only source of water. Construction of a coffer dam would increase the cost substantially and make repairs to the existing dam more expensive than uti1 izing the existing structure as a coffer dam and building a replacement dam downstream. Option 2 -Construction of a New Dam of an Integral Design This option allows for future expansion of the project to maximum hydro development by designing the initial dam to become an integral part of the larger dam. The dam would be of a concrete gravity-arch design. The penstock penetrations and gate facilities will be sized to provide for maximum future generation. Construction of this option has been evaluated for two possible spillway elevations: 845 ft MSL and 850 ft MSL. The cost of these options, and the advantages and disadvantages are discussed below: Option 2A; Gravity Arch, Elevation 845 Estimated total project cost: $2,743,000. Advantages: Lower first cost than option 28 Allows for run-of-river hydro development Can be raised to any elevation up to 885' for future development Disadvantages: 6044/302/16 Provides only minimum storage capacity Higher first cost than options 3A and 3B Page 5-3 Requires maximum removal of existing structure Option 28; Gravity Arch Elevation 850 Estimated total project cost: $3,226,000. Advantages: Provides additional storage capacity Allows for immediate run-of-river development Can be raised to any elevation up to 885' for future development Inundates existing structure, minimizing removal Disadvantages Higher first cost than other options Option 3 -Construction of a New Interim Dam This option allows for an initial cost savings to be realized by designing the dam to a specific height. The dam would be of a concrete thin-arch design which could not be incorporated or expanded into a higher dam. The dam wourcf be designed and located to facilitate the construction of a larger dam downstream at a later date. The dam would also be designed to allow for immediate run-of-river development. Similar to Option 2 this design was also evaluated at ele- vations 845 ft and 850 ft. The advantages and disadvantages are discussed below: Option 3A; Thin-arch, Elevation 845 Estimated total project cost: $2,014,000. Advantages: Lowest first cost of all options Allows for run-of-river development Disadvantages: 6044/302/17 Provides only minimum storage capacity Requires maximum removal of existing structure Page 5-4 Cannot be increased in height Option 38; Thin-arch, Elev. 850 Estimated total project cost: $2,368,000. Advantages: Lower first cost than options 2A and 2B Allows for run-of-river hydrodevel opment. Provides additional storage capacity Inundates existing structure, minimizing removal Disadvantages: Higher first cost tban option 3A Cannot be increased in height 5-5 SELECTED DESIGN The design option selected for this project is Option 2B; gravity-arch dam, elevation 850. This design option has the greatest flexibility to accommodate all scenarios of hydropower development for the project. The design allows for immediate development of run-of-river generation and provides additional storage capacity which will alleviate any potential water shortages due to 1 ow flows or increased water consumption . . The added project cost for this design option is $1,212,000. over the least cost alternative. The total project cost for Option 2B, however, is still well within the available funds for the project. This option will maximize the immediate and long term benefits of the project, and eliminate the possibility of constructing an interim dam which may become obsolete in the near future. 5-6 SCOPE OF WORK The work to be constructed under this project will consist of the following design features: A concrete gravity-arch dam Spillway elevation at 850 ft MSL Penstock and gate structure sized for maximum potential hydrogeneration Diversion conduit and emergency outlet 6044/302/18 Page 5-5 Potable water supply conduit Excavation and toe construction to accommodate expansion to elevation 885 Repairs as required to existing potable water supply line and pressure reducing station to restore functionability. 6044/302/19 Page 5-6 FIGURE 5-l OPTION 2 885' 850'----------------- ' 845-~ EXISTING DAM----t.,..l FIGURE 5-2 OPTION 3 FUTURE DAM INTERGAL DAM -GRAVITY ARCH...; CONCRETE 885'----------------------------r---~ 850' INTERIM DAM THIN ARCH- CONCRETE ------------------845'- ~""""""",...,.._,..,...., EXISTING DAM----t~ FUTURE DAM SECTION VI CHESTER LAKE MANAGEMENT PLAN DESIGN MANAGEMENT 6-1 OBJECTIVES OF DESIGN MANAGEMENT The design objectives for the Chester Lake Project are to achieve minimum construction costs while achieving technical engineering adequacy, economy in operation and maintenance; and assuring that appropriate consideration is given to sound construction practices, qua 1 ity assurance requirements, and environmental and safety aspects. It is the Power Authority's pol icy not to issue bid documents for 11 bidding only!' but to issue final plans and specifications. The schedule for project construction takes this policy into account. The Power Authority a 1 so encourages maximum utilization of lump sum bid items but recognizes that unit price bid items will be necessary where quantities cannot be firmly estimated (i.e. rockbolts, etc.). 6-2 ADMINISTRATION OF DESIGN MANAGEMENT Design management will be the responsibility of the Power Authority's Project Manager. Matrix support from Project Administration, Engineering, Construction and Environmental and Licensing Sections of the Power Authority Projects Directorate will be provided on an as needed basis. Studies, designs, drawings, specifications and other documents prepared by the Design Engineer will be subject to the approval of the Power Authority. 6-3 DESIGN ENGINEERS RESPONSIBILITIES The final design for the Chester Lake Dam Replacement Project will be performed by the Harza Engineering Company. This design effort is scheduled to begin in January 1985 contingent on Board approval. The Design Engineer will accomplish the following: A. Perform any topographic and field surveys, test borings and subsurface geotechnical investigations deemed neces- sary beyond that information obtained during the fea- sibility phases. 6044/302/20 Page 6-1 B. Prepare final design documents based on the results of the investigations performed. C. Prepare plans and specifications and bidding documents for the construction contract. D. Prepare a construction cost estimate based on the ap- proved final design and specifications. E. Assist the Power Authority in securing, analyzing, and evaluating bids for construction. F. Provide engineering services during construction including review and approval of contractor submittals. Prepare design revisions as necessary due to design modifications or unforeseen site conditions or during critical construction operations. G. Prepare the project start-up manual and the operations and maintenance manual. Conduct training classes as required for O&M personnel. H. Assist the Power Authority in resolution of contract disputes and provide expert testimony if required. I. Cooperate, participate, and develop quality assurance plans and procedures as directed by the Project Manager. J. Assist in the accomplishment of other Project related Engineering tasks as directed by the Project Manager. 6-4 REVIEW AND APPROVAL OF DESIGN DOCUMENTS Procedures for the distribution, review, and approval of design documents and for monitoring and controlling the review cycle shall be established by the Power Authority Project Manager to meet the requirements of all participants. Draw- ings, specifications, and contract data will be reviewed and approved as directed by the Power Authority Project Manager. Design reviews by the Power Authority will be conducted at the 50% and 90% design levels as a minimum. As a part of the design review process, the Power Authority will perform constructability reviews of the design and contract documents to identify such items as: cost control and cost reduction measures, procedural and language modifications, improvements to enhance constructability and construction operations. The constructability review will primarily occur at the 50% design level so that maximum benefits can be obtained by revising the design. 6044/302/21 Page 6-2 All design work will be 100% complete and ready for con- struction prior to initiating the bidding process. 6-5 ENVIRONMENTAL PROTECTION Although the Environmental Report for the Chester lake Hydroelectric Project identifies minimal impact as a result of construction, careful attention will be given by the Power Authority's Environmental staff to the implementation of contra 1 and enforcement measures to prevent any unnecessary impact to the environment. These measures will be incorporated into the construction contract. Special attention will be given to protection of water quality within the reservoir to eliminate any poissibility of contamination to the community's water source. All necessary pennits will also be identified and obtained directly by the Power Authority. Monitoring and enforcement of penni ts and environmental stipulations during construction will be the responsibility of the Power Authority's Construction Coordinator. 6-6 INDEPENDENT COST ESTIMATE Pursuant to State Statute and Power Authority policy, an independent cost estimate was prepared during the feasibility study process. The independent estimate was based upon full hydroelectric development of the project and verified Harza's feasibility estimates. New cost estimates for the various design options addressed by this Project Management Plan were recently prepared by Harza based upon the 1 imited scope of construction to be accompli shed under the dam replacement project. These estimates were reviewed against the independent estimate and found to be consistent. Prior to the opening of bids for construction the Power Authority will perform a detailed review of the Engineers esti.mate based upon the final design. This estimate will serve as a check against the validity of the Project Cost Estimate contained in Section X and will allow for bid cancellation if necessary. 6044/302/22 Page 6-3 SECTION VII CHESTER LAKE HYDROELECTRIC PROJECT CONSTRUCTION MANAGEMENT 7-1 OBJECTIVES OF CONSTRUCTION MANAGEMENT Construction management objectives for the Chester Lake Dam Replacement Project include monitoring and controlling construction activities to achieve minimum construction costs, accomplish construction schedule milestones on time, conform to design plans and specifications, conform to Alaska Power Authority policies and project objectives, and accomplish project safety and environmental objectives. 7-2 ADMINISTRATION OF CONSTRUCTION MANAGEMENT Due to the relatively small size of this project, and the fact that all construction will be accomplished under a single contract, the Construction Management Function will be accomplished directly by the Power Authority. Construction management of the Chester Lake Project will be the respon- sibility of the Power Authority•s Project Manager. The Project Manager wi 11 report to the Director of Construction and will supervise the Power Authority Construction Coordina- tor who will be located on the jobsite. Matrix support from the Project Administration, Environmental and Licensing, Construction, and Engineering Sections of the Power Authority Projects Directorate will be provided. Matrix support will also be provided by the Associate Executive Directors of Operations and Finance. These support personnel will be under the operational supervision of the Project Manager. 7-3 ROLE OF CONTRACTED DESIGN FIRM DURING CONSTRUCTION The responsibilities of the Design Engineer for the Chester Lake Project are outlined in Section VI of this document. Prior to and during construction, the design firm will prepare technical plans and specifications to be included in bidding documents, provide support to resolve design problems or review critical construction operations, supervise and monitor procurement activities, and insure that the project is con- structed in accordance with design objectives. The design firm wi 11 have a phys i ca 1 presence on-site throughout the construction phase to provide immediate engineering assistance. 6044/302/23 Page 7-1 7-4 CONSTRUCTION CONTRACT BIDDING The sing 1 e construction contract for this project wi 11 be competitively bid and awarded to the lowest responsive, responsible bidder. Preparation of the construction contract invitations for bid will follow the Power Authority approval of the plans, specifications and contract package. The bidding document for construction contract will be prepared through the combined efforts of the Design Engineer and the Power Authority's Project Manager. Bidding documents will contain General, Special and Technical specifications and will be specifically developed for the Chester Lake Project. The Engineer will prepare the technical provisions of the bidding document to include the plans and technical speci- fications and that portion of the Special Provisions relating to Design. The Power Authority Project Manager will be responsible for the preparation of the General Provisions and the Special Provisions in coordination with the Design Engi- neer. The Design Engineer will finalize, assemble, reproduce, and issue the bid document for advertisement. The Bids wi 11 be received and opened by the Power Authority. Bid Evaluations will be performed by the Project Manager in conjunction with the Design Engineer, and the State's Attorney General's Office. A five percent Bidder's Preference will be applied in accordance with State Statutes. Notice of Intent to Award, Award and Notice to Proceed wi 11 be issued by the Power Authority. 7-5 CONSTRUCTION ACTIVITIES During the construction phase of the project, the Project Manager with support from the matrix organization will accom- plish the following tasks: A. Contract Administration. The Project Manager will administer the fixed-priced construction contract from bidding through contract completion. All contract correspondence wi 11 be between the Project Manager and the contractor. Any design changes, drawing releases or shop drawing reviews will be directed through the Project Manager in order to maintain full control over correspondence to contractors. B. Monitor and Supervise Contractor Submittals. The Project Manager will review, and where necessary coordinate with the Design Engineer all contractor submittals. Data submittals which generally do not require Design Engineer review include: contractor construction schedules, cost breakdown data, and contractor QC or safety plans. All 6044/302/24 Page 7-2 contractor technical submittals requiring a design-related review and approval will be routed to the Design Engineer through the Project Manager. The Project Manager will establish logs to maintain a record and the current status of each submittal and will operate a suspense system to assure that timely action is taken on each submittal. C. Perform Quality Assurance Functions. The Quality Assur- ance (QA} Program will be performed and managed by the Power Authority•s Construction Coordinator. During bid packaging and contract review tasks, the Construction Coordinator will recommend contract revisions to assure that a rigorous Contractor QC program can be enforced. During construction, the contracted Construction Contrac- tor is responsible for the development and implementation of a full scale Quality Control Program including the performance of QC testing. However, all phases of construction will be inspected and quality control tests will be witnessed by the Power Authority•s Construction Coordinator. The construction contractor is also re$ponsible for quality control of materials procurement and will be required to submit appropriate documentation and certifications. The onsite Design Engineer representative will provide assistance to the Con- struction Coordinator on an as required basis. The construction coordinator will maintain the QA/QC records for the project. D. Process Construction Contractor Payment Estimates. The construction contractors must prepare a monthly payment estimate based on an approved bid breakdown and on unit prices. The Construction Coordinator will review these estimates and verify the quantities, unit prices and retention amounts and will recommend approval of the payment requests to the Project Manager or return them to the construction contractor for correction. Approved pay estimates will be processed for payment through proper Power Authority channels. E. Maintain Photographic Records of Project Progress. Photographs and slides are an invaluable record of progress status and an excellent aid in claims prevention or resolution. The Construction Coordinator will provide photographic coverage of the project on a periodic basis for progress and on a site specific basis for claims documentation. Photographs will be compiled in albums with date, description and photographer identified. These albums will become part of the fipal project files. 6044/302/25 Page 7-3 F. Process Change Orders and Contract Modifications. The Project Manager will have the responsibility and authori- ty to negotiate Change Orders to the construction con- tract and prepare Change Orders for approva 1 • However, the fi na 1 approva 1 authority wi 11 remain with the Power Authority•s Contracting Officer. The Construction Coordinator will have authority to issue directives to the Contractor after review and concurrence by the Project Manager. Change orders will be identified, processed and resolved as expeditiously as possible. All change orders/modifications will be forward priced whenever possible. 6044/302/26 Page 7-4 8-1 GENERAL SECTION VIII CHESTER LAKE MANAGEMENT PLAN PROJECT TRANSFER Upon completion of all construction activities and final acceptance by the Power Authority, the project will be trans- ferred to the Metlakatla Indian Community. The Community will then become responsible for the operations and maintenance of the facility. All terms and conditions relating to the transfer of the project will be made part of the Power Authority/Metlakatla Chester Lake Agreement between the Power Authority and the Metlakatla Indian Community, which will be negotiated prior to project construction. 8-2 OPERATION AND MAINTENANCE TRAINING As part of the facility transfer, the Power Authority through the Design Engineer will provide operations and maintenance training to the Community. Start-up, and operations and maintenance manuals will also be provided. 8-3 PROJECT RECORDS The completed project records will be retained by the Power Authority in the event the project is someday developed into a hydropower facility. Copies of the as-built drawings, vendor instructions, O&M manu a 1 s and other documents necessary to operate and maintain the facility will be provided to the Metlakatla Indian Community. 6044/302/27 Page 8-1 SECTION IX CHESTER LAKE MANAGEMENT PLAN PROJECT MILESTONES The project milestones for the Chester Lake Dam Replacement Project are: Milestone Board Approval Negotiate Change Order for Design Begin Design 50% Design Review 90% Design Review Issue Invitation to Bid for Construction Bid Opening Award Contract/NTP for Construction Start Construction Complete Construction 6044/302/28 Page 9-1 Date 13 December 1984 17 December 1984 1 January 1985 15 February, 1985 15 March 1985 15 April 1985 1 June 1985 15 June 1985 1 July 1985 31 October 1985 Construction Costs: 1. Mobilization 2. Access TABLE 10-1 PROJECT COST ESTIMATE 3. Dam, Spillway of Intake 4. Water Supply 5. Camp 6. Indirect Cost 7. Profit Total Construction Cost Engineering (@ 8%) APA Construction Management (@ 5%) APA Administration (@ 4%) Subtotal Contingency (@ 20%) Total Project Cost Appropriated Funds Available 6044/302/30 $ 190,000 600,000 619,000 27,000 335,000 226,000 300,000 $2,297,000 184,000 115,000 92,000 $2,688,000 538,000 $3,226,000 $3,300,000 10-1 COST ESTIMATE SECTION X CHESTER LAKE MANAGEMENT PROJECT COST ESTIMATE The Project Cost Estimate for the Chester Lake Dam Replacement Project is summarized in Table 10-1. This estimate is based upon the recommended Design Alternative (Option 28): construction of a concrete gravity-arch dam, elevation 850 ft MSL. The total estimated project cost is $3,226,000. which is less than the $3,300,000. of appropriated project funding currently available. 6044/302/29 Page 10-1