| Date |
Text |
| 2019-10-30 16:04:13 | THE PROPOSED DRAINAGE DESIGN IN THE OCTOBER 4, 2019 |
| | SUBMITTAL PACKAGE SHOWS THE STORMWATER RUNOFF FROM THE |
| | SIDEWALK AND ROOF DRAINS DIRECTED TO ONSITE |
| | EXFILTRATION TRENCHES WITH NO DIRECT CONNECTION TO THE |
| | DRAINAGE SYSTEM IN THE PUBLIC RIGHT-OF-WAY. NO DRAINAGE |
| | CALCULATION HAVE BEEN SUBMITTED TO INDICATE THE AMOUNT |
| | OF RUNOFF THE EXFILTRATION TRENCHES CAN HANDLE. THE EOR |
| | MAY HAVE SAID THE 5-YEAR 24-HOUR STORM COULD BE HANDLED |
| | BY THE SYSTEM. |
| | |
| | UNLESS THE EXFILTRATION TRENCHES ARE PERIODICALLY |
| | MAINTAINED, THE STORAGE AND DISPOSAL CAPACITY OF THIS |
| | DRAINAGE SYSTEM WILL DIMINISH OVERTIME. IT WILL TAKE |
| | LONGER FOR THE STORED WATER TO FLOW OUT OF THE SLOTTED |
| | PIPE AND INTO THE GROUND TO GROUNDWATER. EVENTUALLY, |
| | THE TRENCHES ALONG THE PERIMETER OF THE SITE FOR |
| | CAPTURING THE SIDEWALK STORMWATER RUNOFF WILL NO LONG |
| | PERFORM THIS FUNCTION BECAUSE THE SYSTEM WILL BE FULL. |
| | THE OPPOSITE WILL LIKELY OCCUR IN THAT ROOF RUNOFF WILL |
| | BACKFLOW THROUGH THE PERIMETER TRENCHES AND FLOW ON THE |
| | SIDEWALK TO THE GUTTER IN THE R/W. SUFFICIENT HEAD |
| | PRESSURE COULD OCCUR IN THE DRAINAGE SYSTEM FROM THE |
| | ROOF DRAINS TO FORCE OPEN THE MANHOLES LIDS AND |
| | MINI-FOUNTAINS ERUPT WITH WATER SPILLING OUT ONTO THE |
| | SIDEWALK. BY THIS TIME THE EXFILTRATION TRENCHES WILL |
| | NEED TO BE DUG UP AND REPLACED WITH CLEAN STONE/ROCKS. |
| | |
| | DUE TO THE DEVELOPER'S AGREEMENT FOR CAPTURING THE |
| | STORMWATER RUNOFF, THE CITY COULD ADD AS A CONDITION OF |
| | APPROVAL THAT THE ONSITE DRAINAGE SYSTEM BE INSPECTED |
| | AND CERTIFIED ANNUALLY BY A FL P.E. THAT THE DRAINAGE |
| | SYSTEM IS PERFORMING AS ORIGINALLY DESIGNED. |
| | |
| | TRACY WARD, P.E. |
| | SENIOR STORMWATER ENGINEER |
| | ENGINEERING SERVICES DEPARTMENT |
| | [email protected] |
| | 561-494-1120 |
| | |
| |
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