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<br />Page 5 <br /> <br />I. INTRODUCTION <br /> <br />A. Purpose: This document is formulated to introduce similarity and consis- <br />tency for storm drainage studies for developments within the City of <br />Lakewood, Colorado; clearly define acceptable drainage analysis and <br />design criteria; and reduce the effort and time required for the drainage <br />approval process. <br /> <br />B. Amendments: The criteria established herein are subject to amendment and <br />revision. Amendments will be applicable to all drainage studies submit- <br />ted after the effective date of amendment. However, final drainage <br />reports which are submitted for approval within sixty days after the <br />effective date of amendment and which have prior approval of a prelimi- <br />nary drainage report are exempt from the amendments. <br /> <br />C. Authority: This Storm Drainage Criteria Manual is a part of the Engineer- <br />ing Regulations, Construction Specifications and Design Standards of the <br />City of Lakewood. <br /> <br />D. Review Process: Adequate time must be allocated in development planning <br />to permit a complete review. The intent of this manual is to more clearly <br />define the City's criteria and reduce the time and effort required to <br />develop an acceptable drainage study. To improve the review process, all <br />reports will receive an initial review to determine if all essential <br />information is present as shown in Appendix A. Engineering review of the <br />drainage plan will not be started until all essential information is pre- <br />sent. A flow chart of the review process is shown in Figure 1. <br /> <br />E. References: The basic reference for this document is the "Urban Storm <br />Drainage Criteria Manual" (USDCM) by the Urban Drainage and Flood Control <br />District. Where specifically referenced, the guidelines and criteria of <br />the Urban Storm Drainage Criteria Manual shall become a part of this <br />manual. <br /> <br />Concepts developed in the "Storm Drainage Design and Technical Criteria" <br />for the City of Louisville by Water Resources Consultants have been <br />adapted for use in Lakewood in the preparation of this manual. <br />