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<br />.~ <br />,,;1 <br />:.:,,1 <br /> <br />. <br /> <br />. <br /> <br />Exhibit A <br />Grant for Proposed Feasibility Study of Long Hollow Reservoir and Red Mesa Reservoir Enlargement <br /> <br />", <br />,.1 <br />.-1 <br /> <br />1 <br /> <br />consolidation tests to evaluate the rate and compressibility of compacted embankment <br />soils. The testing program will include standard property testing such as Atterburg limits, <br />gradation analyses, pinhole dispersion tests and compaction curves from which <br />classification, compressibility and penneability infonnation can be approximated for the <br />on-site soils. <br /> <br />~:~l <br /> <br />., <br /> <br />Durable rocks, including potentially the Cliff House Sandstone, will be evaluated as a <br />source for riprap and concrete aggregate. The investigation will be limited during this <br />study to petrographic analyses, Los Angeles abrasion testing, specific gravity and a <br />review ofUSBR studies on nearby dam sites. <br /> <br />Hydraulics & Hydroelectric <br /> <br />Hydraulics issues related to the dam construction will be evaluated. These issues will <br />include inlet conditions, sizing of outlet works, spillway needs, and conditions in the <br />receiving channel. Evaluation of each of these issues is intended to identify potential <br />hydraulics related fatal flaws for the site and will be incorporated into the alternatives <br />analysis. <br /> <br />In the case of the spillway, the design storm used in the evaluation will be based upon a <br />classification that is related to the size of reservoir, the height of the dam and the <br />potential for property damage or loss of life downstream in the event of a failure. The <br />outlet structure must be sized to draw the reservoir down quickly during an emergency. <br />Both the spillway and the outlet works must be sized for anticipated flows and provided <br />with suitable energy dissipation structures at the downgradient outlet. An outlet will <br />either be placed beneath the embankment or through the right or left abutment. <br /> <br />The feasibility study will also include limited evaluation ofthe potential for the enlarged <br />reservoir to be used for hydroelectric generation. The evaluation will focus on financial <br />feasibility but will also consider feasibility of construction. <br /> <br />Formulation and Evaluation of Alternatives <br /> <br />A. Interpretation of Data <br /> <br />The existing data, the geologic reconnaissance, and the field and laboratory test <br />results will be analyzed to establish strength, compressibility and penneability <br />characteristics of the soils and rock which are in situ or proposed as compacted <br />borrow materials at the dam and reservoir site. <br /> <br />Geologic maps, logs of test borings, laboratory test results and periodic <br />groundwater readings in the piezometers will be used to develop design <br />parameters for use in the formulation and evaluation of alternatives for both the <br />initial and final feasibility phases. <br /> <br />B. Fonnulation of Alternatives <br /> <br />.::~ <br /> <br />",j <br /> <br />Tasks: <br /> <br /><~ <br /> <br />1, Embankment Section Reservoir Geometry. <br />