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<br />EXHIBIT A <br />SCOPE OF WORK <br /> <br />1. INTRODUCTION <br /> <br />The Texas Water Development Board (TWDB) shall perform, or <br />cause to have performed, a hydrographic survey of Lake Crook, <br />Texas. The purpose of this survey is to collect hydrographic data <br />when the reservoir is at or above the normal/conservation pool <br />elevation, and convert this information into area-elevation-volume <br />table. <br /> <br />2. LOCATION OF SURVEY <br /> <br />Lake Crook is located in Lamar County in east Texas. The dam and <br />lake are on Pine Creek approximately two miles north of the City of <br />Paris, Texas. The facility provides water supply for Paris, Texas. <br />Water-rights owner and operator of Lake Crook is the City of Paris, <br />Texas. The lake has a surface area of 1,226 acres. <br /> <br />3. SURVEY PLAN, SPECIFICATION, AND ANALYSES <br /> <br />Surface acreages will be based on Digital Orthophoto Quadrangles, if <br />available. Positioning on the lake surfaces will be establis ed <br />utilizing Differential Global Positioning System (DGPS) wit an <br />estimated resolution of three meters or better. Survey dat will be <br />collected from survey lines spaced at approximately 500 ~ et. These <br />lines will be followed to the extent possible as permitted b <br />obstructions. Positioning and sounding data will be colle d and <br />stored electronically at the rate of one measurement every second, or <br />an average spacing of twenty (20) feet. The model of the ake <br />bottoms will be mathematically interpolated between colleqted points <br />by accepted engineering practices, and will be mathematicjal <br />estimates of the actual bottoms. . <br /> <br />Analyses of the survey data will include the following deliv rabies: (1) <br />elevation-area-volume tables, acceptable to the Texas Na ural <br />Resource Conservation Commission (formerly the Texas ater <br />Commission), of the reservoirs with definition of 0.1 feet; ( ) bottom <br />contour maps with definition of 5 feet; and (3) a shaded rei, ef plot of <br />