Supporting Documentation · Jun 3, 2026
2026 02 12 Crestmont CC and Eagle Rock Ave Stormwater Management Report
b2e79b7061cbbbe57e9837f2fec3a1c0d102ba104a1fd5bfe1ade5107afe3de3Indexed text
= = APPENDIX B Proposed Stormwater Discharge Calculations
= = APPENDIX B TABLE OF CONTENTS NOAA RAINFALL PRECIPITATION DATA NOAA REGION D RAINFALL DISTRIBUTION PROPOSED RUNOFF CURVE NUMBER CALCULATIONS CURRENT HYDROGRAPH CALCULATIONS PR-1A-DISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-1A-UNDISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-1A WATERSHED (COMBINED PROPOSED FLOW TO SSBB-1) 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-1B-DISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-1B-UNDISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-1B WATERSHED (COMBINED PROPOSED FLOW TO SWALE 1) 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event
= = PR-1C-DISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-1C-UNDISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event TOTAL PROPOSED FLOW TO POA-1 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-2A-DISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-2A-UNDISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-2A WATERSHED (COMBINED PROPOSED FLOW TO SSBB-2) 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-2B-DISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event
= = PR-2B-UNDISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-2B WATERSHED (COMBINED PROPOSED FLOW TO PAPS-1) 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-2C-DISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-2C-UNDISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event TOTAL PROPOSED FLOW TO POA-2 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event SUMMARY OF PROPOSED PEAK DISCHARGES FUTURE HYDROGRAPH CALCULATIONS PR-1A-DISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-1A-UNDISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event
= = PR-1A WATERSHED (COMBINED PROPOSED FLOW TO SSBB-1) 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-1B-DISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-1B-UNDISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-1B WATERSHED (COMBINED PROPOSED FLOW TO SWALE 1) 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-1C-DISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-1C-UNDISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event TOTAL PROPOSED FLOW TO POA-1 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event
= = PR-2A-DISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-2A-UNDISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-2A WATERSHED (COMBINED PROPOSED FLOW TO SSBB-2) 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-2B-DISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-2B-UNDISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-2B WATERSHED (COMBINED PROPOSED FLOW TO PAPS-1) 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event PR-2C-DISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event
= = PR-2C-UNDISTURBED WATERSHED Time of Concentration Calculation 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event TOTAL PROPOSED FLOW TO POA-2 2 Year Design Storm Event 10 Year Design Storm Event 25 Year Design Storm Event 100 Year Design Storm Event SUMMARY OF PROPOSED PEAK DISCHARGES
NOAA RAINFALL PRECIPITATION DATA
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