| Date |
Text |
| 2016-11-18 10:10:14 | COMMENTS BELOW ARE FROM THE REVIEW OF THE 11/9/2016 |
| | ROUTED SUBMITTAL PACKAGE. |
| | |
| | 1. DRAINAGE CALCULATIONS SHOW THE 25-YEAR 3-DAY PEAK |
| | STAGE FOR BASIN 2 (NEW GRACE PAVILION) INCREASING FROM |
| | 19.42 FEET NGVD (2008 ERP PERMIT) TO 19.42 FEET NGVD |
| | WITH THE LAKE MOVED. THIS IS LIKELY DUE TO THE |
| | TAILWATER CONDITIONS ON THE CONTROL STRUCTURE. THE 2008 |
| | DRAINAGE CALCULATIONS ASSUMED A MAX TAILWATER STAGE OF |
| | 15.0 FEET NGVD IN THE LAKE WHEREAS THE 2016 STORMWATER |
| | MODEL ACCOUNTS FOR THE ENTIRE 13.2 ACRE DRAINAGE AREA. |
| | SINCE THE TWO DRAINAGE BASINS ARE BEING MODELED |
| | TOGETHER, HAVE YOU CONSIDERED LOWERING THE WEIR IN THE |
| | EXISTING CONTROL STRUCTURE FOR BASIN 2? THIS MAY LOWER |
| | THE PEAK STAGE IN BASIN 2 SO THAT THE PERIMETER BERM |
| | WILL NOT HAVE TO BE ADJUSTED. SFWMD WOULD HAVE TO |
| | APPROVE CHANGES TO THE CONTROL STRUCTURE. |
| | |
| | 2. DRAINAGE CALCULATIONS FOR THE BUILD OUT CONDITION ON |
| | THE 13.2 ACRE SITE INDICATE THE PERIMETER BERM WILL |
| | NEED TO BE RAISED TO ELEVATION 20.0 FEET NGVD TO |
| | CONTAIN THE PEAK 25-YEAR 3-DAY STORM. WILL RAISING THE |
| | PERIMETER BERM TO 20.0 FEET NGVD AFFECT THE STORAGE |
| | VOLUME IN THE SOUTHEAST DRY DETENTION AREA (DDA) (TWO |
| | SIDES OF DDA ABUT THE SITE PROPERTY LINE) AND WAS THIS |
| | TAKEN INTO ACCOUNT IN THE BUILD OUT CALCULATIONS? WITH |
| | THE DESIGN GRADING FOR THE ENTRANCE ROAD ON MILITARY |
| | TRAIL TAKE INTO CONSIDERATION THE FUTURE MINIMUM |
| | PERIMTER ELEVATION? |
| | |
| | 3. CAN THE PROPOSED LAKE BE ENLARGED TO REDUCE THE |
| | FUTURE BUILD OUT PEAK STAGE? |
| | |
| | 4. APPROVED SFWMD ERP PERMIT MODIFICATION TO BE |
| | SUBMITTED WITH THE ENGINEERING PERMIT. |
| | |
| | 5. LANDSCAPE PLANS SHOW NEW TREES PLANTED ALONG THE |
| | OUTFALL PIPE INTO THE NEW LAKE. RECOMMEND PLANTING THE |
| | TREES A MINIMUM OF 5 FEET HORIZONTALLY FROM THE STORM |
| | PIPE. |
| | |
| | TRACY L. WARD, P.E. |
| | SENIOR STORMWATER ENGINEER |
| | ENGINEERING SERVICES DEPARTMENT |
| | [email protected] |
| | 561-494-1120 |
| | |
| |
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