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<br />Mr. Dan Courson <br />Page 2 <br />October 21, 1980 <br /> <br />for both county and state mining permits, The regulations are <br />generally very clear that the impact of the proposed mining and <br />reclamation plans on the existing flood plain and the potential <br />for flood increased damage either upstream or downstream, are <br />to be quantified by qualified personnel. This includes the po- <br />tential for creek relocation. Adverse impacts are to be miti- <br />gated to the greatest extent possible. One of the objectives of <br />the gravel permitting process, is the prevention of poorly planned <br />operations like this one. Most gravel operators recognize the <br />need for responsible planning, but it would appear that the pre- <br />sent operator has proceeded with total disregard for the permit- <br />ting process, reasonable awareness of flood plain impacts and <br />the safety and welfare of others and their property. <br />We have estimated the volume of material and the cost of repair- <br />ing the damage to the natural bank and channel dike. Approxim- <br />ately 1300 feet of dike needs to be replaced. Although loosely <br />piled sand and gravel occupied about 1/4 of this length on Sept. <br />13, 1980, the entire length will have to be replaced with suit- <br />able material and property compacted. A dike approximating the <br />one existing before removal will take about 10,600 cubic yards <br />of material. We also recommend that the river side of the dike <br />be protected against erosion for approximately 800 feet of its <br />length. This will require an estimated 820 cubic yards of prop- <br />erly sized riprap. We estimate that it would cost $73,000 to <br />accomplish the remedial measures described above, <br />We hope this information is useful in your dealings on behal <br />of Mr. Slovek. Please let us know if we can be of more assistance. <br />We believe that if all gravel operators should operate under the <br />same set of rules, all will benefit. Good luck. <br />Very truly yours, <br />LEONARD RICE CONSULTING WATER ENGINEERS, INC. <br />Leslie H. Botham <br />P.E. No. 14387 <br />LHB/j7 <br />517NFA01 <br />JC1 Leonard Rice Consulting Water Engineers.lnc. <br />