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3050 . winds that occur along the eastern front range of Colorado are uncommon at Pueblo Reservoir. High winds of 80 knots have been reported during short gusts. The average hourly wind speed is approximately 8.5 knots. Sunshine can be expected in the area about 73 percent of the time. b. Topography,--The reservoir area is located near the inter- face of the Southern Rocky Mountain and Great Plains Physio- graphic Provinces. It consists of a broad valley having characteristically steep sides and a rather narrow, nearly level floor, Uncontrolled washes and gullies typify the area, To the west, the foothills rise to meet the Wet Mountains, with the higher Sangre De Cristo Range forming the backdrop, (See Figure 6 - Pueblo Dam and Reservoir Site). To the east extends the broadening Arkansas Valley and the terraced high plains, Pikes Peak is to the north and the Spanish Peaks are to the south. . c, Soils.--Pueblo Dam and Reservoir are located in an area of low dipping sedimentary rocks. The formational dip is to the east and away from the Wet Mountains of the Southern Rockies. The damsite is a symmetrical north-south trending anticline having a maximum dip of 5 degrees. Cretaceous aged sandstone, shale, and limestone are the indurated material in the area of the dam and reservoir, Outcrops of these are common; however, the general condition is the consolidated material being overlain by a thin mantle of some combination of gravel, sand, silt, and clay. The river plain has an alluvial cover that is up to 5a feet thick. The reservoir walls are shale and limestone with a thin (0-10 feet) covering of unconsolidated mate~ials. Some bank erosion of the overburden will result from wave action. In areas where primarily sand exists erosion 'may create a desirable beach. In areas where the bank is primarily silt and clay, a small,steep, unvegetated bank may be formed. The shoreline development will be similar to most reser- voirs located in the Plains, No unusual geologic or paleontologic sites will be covered by the reservoir, No known mineral deposits are in the reservoir areas; two "dry" oil well attempts are located immediately downstream of the dam. 20 .