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Chapter VI - Selection of Alternative and Financial Plan A. Narrative Description Based on the financial, institutional, and social impacts, Alternative 1- Replacement is selected as the preferred alternative for the dam rehabilitation. The preferred alternative was selected based on constructablity, costs, reliability, reduced impact to the environment, and provision for the continued use of the asset (historic water yield). B. Hydraulic and Structural Design Criteria Hydraulic design criteria are primarily limited to the sizing of the outlet pipe. The outlet pipe will be sized based on the SEO criteria presented in their Dam Safety Project Review Guide. Structural design will follow the present version ofthe ACI code. C. Land and Right-of-Way Requirements The Company owns the embankment and inundated land upstream of the dam centerline axis. The construction of the project will be performed on the land that the Company owns. D. Project Implementation Schedule Table VI-l is a potential schedule for implementing this project. E. Cost Estimates Table V-2 presents an estimate of the construction and construction engineering costs associated with the selected spillway alternative for this project. The design ofthe project is $29,000 including geotechnical and surveying services, and this feasibility report. The design phase of the project will include the design of the outlet pipe and toe drain system. Table VI-2 summarizes the costs estimated for this project. F. Financial Program The Company does not have any outstanding loans (long-term debt) with the CWCB. Using estimated project costs of $404,000, the total amount eligible for CWCB financing at 75 percent would be $303,000. Subtracting the grant for the feasibility study loan from this amount indicates that they could apply for a loan of approximately $298,000 as shown in Table VI-3. Lake Arrowhead Dam Rehabilitation Feasibility Study 14 B~DVLE