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• <br />• <br />• <br />Mrs. Ann Tatum <br />March 16, 1995 <br />Page 7 <br />There is a field between the house and the south hillside with numerous cattle grazing. This <br />field rises from the intermediate to the higher terrace. The field is irrigated from a ditch that <br />flows along the uphill end of the field next to the railroad tracks. Turnouts from the ditch flow <br />into a secondary ditch within the field from which the field is flood irrigated. At the lower end <br />of the field there is a ditch to capture the run-off water and carry it away from the residence. <br />The railroad is at the upper end of the valley floor at the base of the hillside. The railroad <br />grade is partially excavated into the hillside. Immediately south of the home, there is a small <br />ridge and a small valley. Where the railroad cuts through the small ridge, colluvial material and <br />some bedrock outcrops are exposed. There is a small debris fan below the valley, through <br />which the railroad is cut. The colluvium appears to be clay with some pebbles and gravel that <br />looks like debris flow material. <br />Returning towards the home in a southeasterly direction we descended from the highest to <br />the intermediate level terrace. Behind the house, the scarp between the highest and the <br />intermediate terrace is obscured by colluvium from the small drainage that is roughly centered <br />on the home. <br />To the southeast there is a terrace escarpment that is about 10 to 20 feet high. The materials <br />exposed on the terrace are river gravels and cobbles. About 200 to 300 feet east of the <br />residence at the base of this escarpment, there is a spring. At the time of our visit, the spring <br />was flowing weakly, less than a gallon a minute. There is an unused, empty stock tank. <br />Towards the residence there is another spring feeding an active stock tank that was brim full. <br />A small trickle of water from a pipe coming out of the hillside empties into the tank. The <br />emerges relatively near the top of the slope. The ground for 50 or more feet on either side <br />of the spring, but especially towards the house, is very soggy as this is an area of seepage. <br />My interpretation here is that the terrace deposits are relatively thin and overlie the bedrock <br />material that creates an aquatard. Groundwater within the terrace is actively seeping where <br />this relatively impervious bedrock outcrops near the terrace slope. <br />Adjacent to the residence itself, where the river makes its most northerly meander, it is cutting <br />into bedrock. Due north of the home, the river flows directly on bedrock for several hundred <br />feet due north of the home. The meander turns back to the east to pass under the driveway <br />bridge leading to the house. <br />f:~propcts~250 7 8~25018.mem <br />