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AQUATIC AND WETLAND CONSULTANTS <br />LAURANNE P. RINK <br />PRESIDENT <br />JOHN T. WINDELL, PH.D. <br />VICE PRESIDENT <br />7 September 1993 <br />Mr. Rob Helmick <br />Land Use Department <br />Boulder County <br />P.O. Box 471 <br />Boulder, Colorado 80306 <br />RE: Technical response to letter from Thomas M. Abbott regarding Southwestern Portland <br />Cement's Dowe Flats permit applications <br />Dear Mr. Helmick: <br />I am in receipt of a copy of a letter addressed to you from Mr. Thomas M. Abbott dated 14 August <br />1993 regarding the above referenced project. On behalf of Southwestern Portland Cement, I offer <br />the following technical information for your review. <br />Aquatic and Wetland Consultants, Inc. (AWC) completed a preliminary wetland inventory of the Dowe <br />Flats site in May of 1987. Wetlands were delineated according to the methods contained in the <br />"Wetland Delineation Manual" (U.S. Army Corps of Engineers 1987) using the definition of wetlands <br />found at 33 CFR 328.3 as follows: <br />"..those areas that are inundated or saturated by surface or groundwater at a frequency and <br />duration sufficient to support, and that under normal circumstances do support, a prevalence <br />of vegetation typically adapted for life in saturated soil conditions. Wetlands generally include <br />swamps, marshes, bogs, and similar areas." <br />Indicators of hydrophytic vegetation, hydric soils, and adequate hydrology were investigated and <br />required in order to make a positive wetland determination. Results were illustrated at a scale of <br />1 °=400' using field based measurements. Terry McKee, Resource Specialist with the Denver office <br />of the U.S. Army Corps of Engineers (Corps), conducted a thorough field verffication of AWC's work <br />and documented his concurrence with the inventory in a letter to me dated 25 September 1987. <br />Siena Square • 2060 Broadway • Suite 255 • Boulder, CO 80302 • (303) 442-5770/442-8133 FAX <br />Post Office Box 9280 • Santa Fe, NM 87504 • (505) 988-7453/988-3720 FAX <br />