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-7- <br />• <br />fairly flat and slopes gently down to the east. An air quality <br />monitoring station is presently located west of the site. <br />GDOIAGIC SETTING <br />The underlying bedrock at the pond sites consists of the <br />Tertiary CoaLront Formation. The rock types wnsist of interbedded <br />claystone and siltstone. The present Dual mining operation is <br />extracting coal frrm the Sudduth seam, located at the base of the <br />formation. Structurally, the area is highly folded., The pond sites <br />are to be situated alomg a synclinal fold referred to as the Johnny <br />Moore Syncline. Bedding attitudes dip ~roderately to steeply (25° to <br />80°) down to the synclinal trough. <br />• Zhe overlying unwnsolidated surficial deposits consist of <br />alluvial and oollwial soils. Quaternary age terrace deposits <br />consisting of sand, gravel and cobbles were observed on the upland <br />surfaces away from the drainages. These deposits were not encountered <br />during our investigation. Slopes between the terrace deposit and <br />major drainages are generally cclluvium covered, consisting of clays <br />and some lenses of clayey sand and gravel. Alluvium, consisting <br />primarily of sandy clay, was foul associated adjacent to the major <br />drainages. The engineering d~aracteristics of these deposits are <br />discussed in more detail in the Subsoils sectic~ of this report. <br />Zhe pond sites are located within Seismic Zone I, indicating a <br />low earthquake probability. <br />• <br />