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PROPOSED OPERATIONS <br /> Gravel Resources <br /> In the Boulder valley the highest quality sand and gravel <br /> deposits are found along the historic floodplains of Boulder <br /> Creek and South Boulder Creek. Other rock deposits are found <br /> such as the deposits at Rocky Flats , the cap gravels <br /> found on some hilltops and the mountains themselves, but <br /> all of these alternative deposits are inferior to the river <br /> gravels from either a quality or a cost standpoint. The <br /> river gravels vary from almost no useable gravel to depths <br /> of over 20 feet with the preponderance of gravel depths <br /> being 12 feet or less . <br /> • I <br /> The ownership of these gravel bearing lands is highly <br /> fragmented due to the urban development which has occurred <br /> on them and due to the historically small size of the river <br /> bottom farms in the as yet undeveloped areas . <br /> Total gravel usage in Boulder county depends upon the <br /> amount of development, redevelopment and maintenance which <br /> occurs in any given year: The quantity of gravel used from <br /> all producers in the county in 1979 likely exceeded 2 million <br /> tons . Usage in 1980 probably did not equal 1979 levels <br /> due to budget constraints and lessened demand for new <br /> �� B-1 <br />