Stormwater Report 1

TABLE OF CONTENTS Introduction ..................................................................................................................................... 3 Proposed Improvements.................................................................................................................. 3 Methodology ................................................................................................................................... 4 Existing Conditions......................................................................................................................... 5 Drainage area 1 (DA-1) .............................................................................................................. 5 Curve Numbers ........................................................................................................................... 5 Peak Flows .................................................................................................................................. 5 Post-Development Runoff Target ..................................................Error! Bookmark not defined. Proposed Conditions ....................................................................................................................... 6 Drainage area 1 (DA-1) .............................................................................................................. 6 Curve Numbers ........................................................................................................................... 6 Peak Flows .................................................................................................................................. 6 Water Quality .................................................................................................................................. 7 Groundwater Recharge ................................................................................................................... 7 Storm Sewer Computations ............................................................................................................ 7 Conclusion ...................................................................................................................................... 7 Existing Conditions Hydrographs Proposed Conditions Hydrographs Appendix - Web Soil Survey - Essex County Soils Information - New Jersey 24 Hour

..................................................... 7 Existing Conditions Hydrographs Proposed Conditions Hydrographs Appendix - Web Soil Survey - Essex County Soils Information - New Jersey 24 Hour Rainfall Frequency Data - Table 2-2a Runoff Curve Numbers for Urban Data - Figure 10-B Rainfall Intensity – Duration Frequency Curve – Northern Region - Table 7 – Existing Vs. Proposed Runoff Rates – Current Adjusted Rainfall - Table 8 – Existing Vs. Proposed Runoff Rates – Future Projected Rainfall - Time of Concentration Calculations - Storm Sewer Calculations - Drainage Area Maps (Fig.-1 – Fig.-3) 2