Laserfiche WebLink
4. Identify which method was used to determine detention volume requirements <br />* and how allowable release rates were determined. <br />✓ * 5. Identify how the capacity of open channels and culverts were determined. <br />6. Identify any special analysis or design requirements not contained with the <br />i * Manual. <br />A) P 7. Identify how and why any other deviations from the Manual occurred. <br />E. Variance from Criteria <br />v i 1. Identify any provisions of the Manual for which a variance is requested. <br />2. Identify pre - existing conditions which cause the variance request. <br />*IV. POST CONSTRUCTION STORMWATER MANAGEMENT. See Manual Section 1600 <br />for requirements. <br />Note: This section of the Final Drainage Report identifies additional information required by <br />Mesa County's, City of Grand Junction's, and Town of Palisade's, Permit for <br />Stormwater Discharges Associated with Municipal Separate Storm Sewer Systems <br />(MS4s), permit No. COR- 090000. The Final Drainage Plan and the Construction <br />SWMP (see SWMM Section 1500) meets the requirements of the MS4s Permit. In <br />general, this section identifies permanent BMP practices to control the discharge of <br />pollutants after construction is complete. <br />*A. Stormwater Quality Control Measures <br />1. Describe the post - construction BMPs to control discharge of pollutants from the <br />* project site. <br />2. If compensating detention is provided, discuss practices to address water <br />* quality from area not tributary to detention area. <br />3. If underground detention is proposed, discuss how water quality facilities will be <br />* provided on the surface. <br />4. If proprietary BMPs are proposed, provide the justification and sizing <br />requirements (see SWMM Section 1603.3). <br />*B. Calculations <br />1. Provide methods and calculations for WQCV, sediment storage, and water <br />quality outlet structure. <br />V. CONCLUSIONS <br />A. Compliance with Manual <br />Compliance with Manual and other approved documents, such as drainage <br />plans and floodpiain studies. <br />B. Design Effectiveness <br />Effectiveness of drainage design to control impacts of storm runoff. <br />C. Areas in Flood Hazard Zone <br />Meet requirements of Floodplain Regulations: Mesa County Land Development <br />Code, Section 7.13; City of Grand Junction Zoning and Development Code, <br />Section 7.1. <br />D. Variances from Manual <br />Applicant shall identify any requested variances and provide basis for approving <br />variance. If no variances are requested, applicant shall state that none are <br />requested. <br />VII. REFERENCES <br />Provide a reference list of all criteria, master plans, drainage reports, and technical <br />information used. <br />TABLES <br />Include copy of all tables prepared for report. <br />FIGURES <br />A. General Location Map (See Section 303.2x) <br />B. Flood Plain Information <br />Page 3 of 4 <br />