| Date |
Text |
| 2019-11-19 12:03:00 | THE FOLLOWING COMMENTS ARE FROM THE REVIEW OF THE |
| | NOVEMBER 15, 2019 SUBMITTAL REVIEW PACKAGE: |
| | |
| | 1. THE UTILITY EASEMENTS SHOWN FOR THE STORMWATER PIPES |
| | CROSSING THE LOTS SHOULD BE LABELED AS DRAINAGE |
| | EASEMENTS. |
| | |
| | 2. THE PERIMETER BERMS SHOULD BE HIGHER THAN THE WEIR |
| | ELEVATIONS BY 3 INCHES OR MORE SO THAT ALL DISCHARGE |
| | FOR THE DESIGN STORM WILL BE THROUGH THE CONTROL |
| | STRUCTURES. |
| | |
| | 3. ADDITIONAL ROOT BARRIERS WILL BE NEEDED BETWEEN |
| | PROPOSED TREES AND THE PROPOSED DRAINAGE EASEMENTS. |
| | SPECIFICALLY, ADD ROOT BARRIERS FOR THESE LANDSCAPE |
| | ISLANDS: |
| | |
| | SHEET LP-3 |
| | - ADD ROOT BARRIER IN THE NORTH-SOUTH ORIENTATION |
| | BETWEEN THE EAST SIDE OF THE TWO PROPOSED DRAINAGE |
| | EASEMENTS AND THE TREES ALONG THE NORTH PROPERTY LINE; |
| | - ADD ROOT BARRIER ALONG THE EAST SIDE OF THE PROPOSED |
| | DRAINAGE EASEMENT OR WEST CURBLINE OF THE CENTER |
| | LANDSCAPE ISLAND NEXT TO THE WEST DRAINAGE EASEMENT; |
| | - ADD ROOT BARRIER ALONG THE EAST SIDE OF THE PROPOSED |
| | DRAINAGE EASEMENT OR WEST CURBLINE OF THE EASTERN-MOST |
| | LANDSCAPE ISLAND NEXT TO THE EAST DRAINAGE EASEMENT; |
| | |
| | SHEET LP-4 |
| | - ADD ROOT BARRIER ALONG THE WEST SIDE OF THE PROPOSED |
| | DRAINAGE EASEMENT FOR THE TREE IN THE WIDE LANDSCAPE |
| | ISLAND IN THE CENTER OF THE PARKING LOT; |
| | - ADD ROOT BARRIER ALONG THE EAST SIDE OF THE PROPOSED |
| | DRAINAGE EASEMENT FOR THE TREE NEAR THE SOUTH PROPERTY |
| | LINE |
| | |
| | SHEET LP-5 |
| | - ADD ROOT BARRIER ALONG THE EAST SIDE OF THE PROPOSED |
| | DRAINAGE EASEMENT OR WEST CURBLINE OF THE CENTER |
| | LANDSCAPE ISLAND; |
| | - ADD ROOT BARRIER ALONG THE EAST SIDE OF THE PROPOSED |
| | DRAINAGE EASEMENT FOR THE TREE NEXT TO THE SOUTH |
| | PROPERTY LINE; |
| | |
| | SHEET LP-6 |
| | - ADD ROOT BARRIER IN THE NORTH-SOUTH ORIENTATION |
| | BETWEEN THE EAST SIDE OF THE PROPOSED DRAINAGE |
| | EASEMENTS AND THE TREE ALONG THE NORTH PROPERTY LINE; |
| | |
| | 4. PROVIDE CCTV OF THE DRAINAGE PIPES BETWEEN THE ALLEY |
| | AND CANAL. |
| | |
| | 5. WEIR ELEVATIONS ARE HIGHER THAN PAVEMENT GRADE |
| | ELEVATIONS. APPLICANT RESPONDED THAT THE EXFILTRATION |
| | TRENCH IS DESIGN TO STORE THE RUNOFF FROM THE 10-YEAR |
| | 1-DAY DESIGN STORM EVENT WITHOUT THE PARKING LOT |
| | FLOODING. THE OVERFLOW WEIR ELEVATION FOR EACH PARKING |
| | LOT WAS SET TO CONTAIN ONSITE THE RUNOFF FROM THE |
| | 10-YEAR 3-DAY DESIGN STORM. |
| | |
| | OVER TIME THE EFFECTIVENESS OF THE EXFILTRATION SYSTEMS |
| | TO DISPOSE OF THE STORMWATER RUNOFF WILL DIMINISH TO |
| | THE EXTENT THAT THE PARKING LOT WILL LIKELY FLOOD FOR |
| | STORM EVENTS SMALLER THAN THE 10-YEAR 1-DAY DESIGN |
| | STORM. THE APPLICANT SHOULD BE AWARE THAT THERE IS A |
| | RISK OF THERE BEING 12 TO 17 INCHES OF STANDING WATER |
| | IN THE PARKING LOTS DURING AND AFTER A STORM EVENT AND, |
| | DEPENDING ON THE GROUNDWATER TABLE AND EFFECTIVENESS OF |
| | THE EXFILTRATION TRENCHES, THE PARKING LOT(S) MAY BE |
| | FLOODED FOR AN EXTENDED PERIOD OF TIME. |
| | |
| | THE APPLICANT/OWNER SHOULD ACKNOWLEDGE THIS SITUATION |
| | AND AGREE TO INCLUDE LANGUAGE REGARDING THE FLOOD RISK |
| | IN LEASE AGREEMENTS FOR THE SITES. |
| | |
| | TRACY L. WARD, P.E. |
| | SENIOR STORMWATER ENGINEER |
| | ENGINEERING SERVICES DEPARTMENT |
| | [email protected] |
| | 561-494-1120 |
| |
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