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SECTIONONE Introduction ~ 1.1 STUDY PURPOSE ~ The purpose of the Knouth Reservoir Project is to enhance the means for SIDC to continue providing irrigation water to shareholders by adding another storage option to their present ~ system. The purpose of this study was to update the 2003 Study. The study goals included the following: 1. Identify the cause of two seepage areas, one along the maYimum section at the north embat~nent and one at the south embankment; 2. Prepare mitigation alternatives that would reduce the seepage and allow permanent water storage in the reservoir; and 3. Prepare alternatives tHat would address other SEO dam safety concerns related to the spiilway capacity, structural conditions of the north and south outlets, and vegetation growth along the upstream and downstream dam faces. 1.2 SCOPE OF WORK This study was divided into four tasks which included 1) Task 1- Drilling Program, 2) Task 2- Laboratory Program, 3) Task 3- Outlet Inspection, and 4) Task 4- 2003 CWCB Feasibility Study Update. Task 1- Drilling Program The goals of the drilling program was to collect field samples for laboratory testing, identify seepage causes, and verify findings and recommendations in the 2003 Study related to geotechnical related issues. T'he dritling program consisted of seven borings; five borings along the north embankment and two borings along the south embankment. Four borings of the five borings along the north embankment were located along the dam crest with the fifth boring located at the downstream toe of the dam. Two borings along the south embankment were located along the dam crest. ~ '(~,,5 1-1