Data from Controlled Drilling Program in McHenry County, Illinois (Classic Reprint) - Softcover

Inhaltsangabe

Excerpt from Data From Controlled Drilling Program in McHenry County, Illinois<br/><br/>A location map is presented for each of the eleven borings, drawn on the scale of one inch equals 2000 feet, or the scale of the United States Geological Survey 7%-minute quadrangle topographic maps. The borings have been located within the lo-acre coordinate squares, with as much accuracy as this scale permits, according to detailed footage locations from easily recognizable landmarks supplied by the contractor. The quadrangle topographic map on which the boring is located is identified on the location map. Quadrangle maps may be obtained from the Illinois State Geological Survey, Urbana, or from the united States Geological Survey, Washington, D.C.

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