1485 Williamsport Dr. & 3480 Havenwood Dr. Development · Redevelopment · 2024-05-23
Each category awards a maximum percentage of the annual stormwater charge as credit. Evidence is extracted directly from the source PDF — no manual review.
| Storm event | Pre-dev (L/s) | Post-dev (L/s) | Δ |
|---|---|---|---|
| 2-yr | 35.51 | 67.86 | +91% |
| 5-yr | 47.15 | 91.22 | +93% |
| 10-yr | 55.09 | 112.36 | +104% |
| 25-yr | 65.16 | 129.05 | +98% |
| 50-yr | 72.67 | 144.62 | +99% |
| 100-yr | 80.22 | 159.41 | +99% |
Quantity control for sub-catchment PC-1 draining to Havenwood Drive. 78.62 m3 module storage + 22.78 m3 granular stone surrounding. 250 mm orifice tube. Allowable release rate 80.22 L/s (100-yr). Also provides 28.45 m3 water balance retention volume.
Quantity control for sub-catchment PC-2 draining to Williamsport Drive south. 15.55 m3 module storage + 6.12 m3 granular stone surrounding. Inlet control device on OGS MH 12 (200 mm PVC STM pipe) as alternative to 85 mm orifice tube (below 100 mm minimum). Allowable release rate 9.25 L/s (100-yr). Also provides 5.67 m3 water balance retention volume.
Forterra Stormceptor EF04 for water quality treatment of sub-catchment PC-1. Installed downstream of underground storage tank.
Forterra Stormceptor EF04 for water quality treatment of sub-catchment PC-2. Also acts as inlet control device for Tank 2.
Infiltration from the bottom of proposed storm tanks as a method to address water balance criteria.
How to read this page. Every value above was extracted from the source PDF by the PARCELFLOW report parser, which combines a layout-robust template detector with a validated extraction stage tuned to Ontario Functional Servicing and Stormwater Management reports. The four-category scorecard maps the parsed evidence onto Mississauga's credit bylaw. Numbers are estimates — engineering review still required before submitting a formal credit application to the City.