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<br />1-3 <br /> <br />6. A recommended alternative has been defined in detail and the <br />rationale or evaluation criteria discussed within this report. <br />C. Information Procurement <br />During the process of this study, approximately twenty agencies, organi- <br />zations and individuals were contacted by Hydro-Triad, Ltd. staff members to <br />obtain information and history on the storm drainage within the Hidden Lake - <br />Bates Lake basins. A considerable amount of data was provided by the City <br />of Arvada, Adams County and the City of Westminster. A list of the agencies <br />and organizations contacted and a summary of the information obtained is <br />presented as Appendix A to this report. <br />In general, we received excellent cooperation from all the agencies and <br />individuals that have interest in the Hidden Lake basin area. There is a <br />certain amount of conflicting information on the status of Hidden Lake relative <br />to water rights and this aspect is discussed in more detail in Chapter II. <br />D. Method of Analysis <br />The sequential process and methods of analysis utilized in this study <br />were based upon the terms of the contract, the Urban Drainage Criteria Manual, <br />current codes and regulations of Adams County and the City of Arvada, as well <br />as certain Hydro-Triad, Ltd. computer programs and analytical procedures. <br />Subsequent to the initial data gathering and field reconnaissance work <br />to establish basin boundaries and existing storm drainage features, the basin <br />was divided into twenty-three separate sub-basins. The physical parameters, <br />i.e. area, length, slope, percent imperviousness of each sub-basin for both <br />existing and future conditions, were then defined and the design storm hydro- <br />graphs developed for the 2, 10 and 100 year recurrence interval storms. The <br />design storms were defined based upon isopluvial maps presented in the Urban <br />