| Date |
Text |
| 2008-05-15 14:41:56 | PASSED, WITH FOLLOWING PROVISO: |
| | PLEASE MAKE SUREYOU CORRECT ITEM #1 & ITEM#3 OF |
| | MOCK-ROOS FOLLOWING LETTER |
| | RASIK CHOKSHI 805-6723 |
| | |
| | MARTIN PILOTE, P.E. |
| | GLOBE ENGINEERING, INC. |
| | N. LAUDERDALE, FL |
| | |
| | HI MARTIN: |
| | |
| | THE FOLLOWING LETTER IS FROM OUR CONSULTANT MOCK-ROOS. |
| | THEY MADE SOME MINOR COMMENTS ON YOUR WATER QUALITY |
| | CALCULATIONS.THEREFORE, WE ASK YOU TO INCORPORATE |
| | THEIR ITEM #1 & ITEM # 3 STATED IN MOCK ROOS'S |
| | FOLLOWING LETTER FOR YOUR WATER CALCULATION PACKAGE AND |
| | YOUR DRAWINGS. HOWEVER, WE HAVE PROVISIONALLY APPROVED |
| | YOUR PLANS THAT YOU WILL CORRECT THE STORM WATER |
| | CALCULATIONS AND DRAWINGS SUGGESTED BY MOCK-ROOS AS |
| | SOON AS POSSIBLE. |
| | THANKS, |
| | |
| | RASIK |
| | |
| | MAY 6, 2008 |
| | MR. EMERY FABIAN |
| | CITY OF WEST PALM BEACH |
| | ENGINEERING PROJECT COORDINATOR |
| | 1000 - 45TH STREET, SUITE 15 |
| | WEST PALM BEACH, FL 33407 |
| | REF. NO. W7700.16 |
| | SUBJECT: FOREST POINT DRAINAGE REVIEW |
| | DEAR EMERY: |
| | WE HAVE COMPLETED OUR REVIEW OF THE PLANS AND |
| | CALCULATIONS PROVIDED FOR THE ABOVE REFERENCED |
| | PROJECT. OUR OBSERVATIONS ARE AS FOLLOWS: |
| | 1. THE PROPOSED EXFILTRATION TRENCH DETAIL SPECIFIES |
| | ONLY 12 INCHES OF BACKFILL OVER THE TRENCH, RATHER |
| | THAN THE 18 INCHES THAT IS SPECIFIED BY THE SFWMD |
| | TYPICAL EXFILTRATION TRENCH DETAIL. |
| | 2. NO GEOTECHNICAL REPORT WAS PROVIDED TO SUBSTANTIATE |
| | THE HYDRAULIC CONDUCTIVITY (K VALUE) OR THE |
| | GROUND WATER TABLE LEVEL. HOWEVER, THE K VALUE APPEARS |
| | TO BE CONSERVATIVE. |
| | 3. THE CALCULATIONS INDICATE THAT THE PROPOSED SITE |
| | PROVIDES STORAGE FOR UP TO THE 10-YEAR/1-DAY |
| | RAINFALL EVENT. HOWEVER, THIS CALCULATION IS BASED ON |
| | AN EFFECTIVE HEAD VALUE OF 10.2? (INLET GRATE |
| | ELEVATION LESS THE GROUND WATER ELEVATION). IT IS MORE |
| | CONVENTIONALLY ACCEPTED THAT THIS VALUE |
| | SHOULD BE THE INLET GRATE ELEVATION LESS THE BOTTOM OF |
| | THE TRENCH, 16.25? ? 9.75 = 6.5?. USING THE |
| | LOWER VALUE, THE PROPOSED VOLUME OF THE TRENCH IS |
| | SUFFICIENT FOR THE 5-YEAR/1-HOUR, WHICH IS THE |
| | SFWMD CRITERION FOR PARKING AREAS, AND IT IS ALSO |
| | ENOUGH STORAGE VOLUME TO PROVIDE FOR THE |
| | RUNOFF FROM THE 5-YEAR/1-DAY; HOWEVER, IT IS NOT ENOUGH |
| | FOR THE 10-YEAR/1-DAY EVENT RUNOFF. ANY |
| | RUNOFF IN EXCESS OF THE 5-YEAR/1-DAY WILL LEAVE THE |
| | SITE. THE PLANS DO NOT INDICATE THE OFF-SITE FLOW |
| | PATTERN AND IT IS UNKNOWN IF THE DISCHARGE FLOWS TO THE |
| | CITY?S SYSTEM OR THAT OF FDOT. |
| | ALL THINGS CONSIDERED, THE PROPOSED DRAINAGE MEETS |
| | SFWMD WATER QUALITY CRITERIA, PROVIDES THE |
| | MINIMUM LEVEL OF PARKING PROTECTION AND WILL BE AN |
| | IMPROVEMENT OVER THE EXISTING CONDITIONS. WE |
| | RECOMMEND THAT THE CITY CONTINUE TO PROCESS THE |
| | PROPOSED SITE APPLICATION. |
| | IF YOU HAVE ANY QUESTIONS, PLEASE CALL ME AT 683-3113, |
| | EXTENSION 231. |
| | SINCERELY, |
| | MOCK, ROOS & ASSOCIATES, INC. |
| | ALAN D. WERTEPNY, P.E. |
| | AC:JEH SENIOR PROJECT MANAGER |
