Upper Wellington Street — Parsed SWM Report

Credit scorecard — Hamilton bylaw

Each category awards a maximum percentage of the annual stormwater charge as credit. Evidence is extracted directly from the source PDF — no manual review.

✓On-site controls

documented source control on the site

50%

—Lake Ontario green-space bonus

direct discharge + green-space parcel flag (90% tier) — not documented

Net credit

50% baseline; up to 90% with Lake Ontario direct-discharge + green-space flag

50%

Pre vs post peak discharge

Storm event	Pre-dev (m3/s)	Post-dev (m3/s)	Δ
5-yr 24-hr	2.7	—	—
100-yr 24-hr	4.89	—	—

Stormwater controls (6)

Underground storageSuperpipe System – Sirente Drive

Conceptual superpipe storage system proposed for quantity control at Sirente Drive; sized to control post-development peak flows to existing conditions for 2- through 100-year storms

Underground storageSuperpipe System – Desoto Drive

Conceptual superpipe storage system proposed for quantity control at Desoto Drive; sized to control post-development peak flows to existing conditions for 2- through 100-year storms

InfiltrationInfiltration Trenches / Infiltrative BMPs

Outletoverflow

Infiltration trenches proposed under pedestrian/bike lanes and sidewalks for erosion/volume control (25 mm event) and water quality; 50 mm clear stone with 0.4 void ratio; minimum 1 m above groundwater/bedrock; subject to geotechnical confirmation

OtherTree Planter/Soil Retention Cells

Outletoverflow

Silva Cells or equivalent modular cellular soil storage systems carried forward for consideration; provide infiltration and evapotranspiration; require pre-treatment (CB Shields or OGS)

Oil-grit separatorOil/Grit Separator Units (OGS)

Two OGS units proposed downstream of superpipe systems for quality control; City accepts 50% TSS removal credit for OGS; Stormceptor EF or equivalent; secondary controls (CB Shields) also anticipated south of Desoto Drive

OtherCB Shield Inserts

CB Shield catch basin inserts proposed as secondary water quality measure particularly south of Desoto Drive to Stone Church Road East; up to 50% TSS removal per ETV testing

Best management practices (9)

Infiltration TrenchesTree Planter/Soil Retention Cells (Silva Cells)Oil/Grit Separators (OGS)CB Shield InsertsExfiltration PipesPermeable Pavers/PavementEnhanced Grassed Swales (screened out)Filter Strips (screened out)Bioretention Systems (screened out)

Site characteristics & report metadata

ProjectUpper Wellington Street (Limeridge Road East to Stone Church Road East) Schedule C (Phases 1–4) Municipal Class Environmental Assessment

Project typeRetrofit

DeveloperCity of Hamilton

Existing land useroadway / urban right-of-way

Proposed land useroadway / urban right-of-way (widened/reconfigured)

Water balance capture25.0 mm

TSS removal target80%

Quality control methodOil/grit separator units downstream of underground storage superpipes, CB Shield catch basin inserts as secondary treatment, infiltration trenches and tree planter/soil retention cells as LID BMPs; 80% TSS removal required for new impervious area

Extraction audit

Confidence: medium Completeness: 67% Source: 89-page PDF Extractor: PARCELFLOW v1 Validation: review recommended

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.