Stormwater Atlas

City of Worcester

Massachusetts Stormwater Management Handbook (city follows MassDEP Standards)

CityDEP / DEQMassachusettsmediumNeeds reviewCitations verified
Open source PDF ↗Official agency page ↗

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Compare each cited field to the official PDF before relying on it. What this means

No durable standalone city design-manual PDF; MassDEP handbook is chaptered — used municipal mirror of 2023 draft with appendices (same source as ma-state-draft).

Fields not found in document: document_metadata.adoption_or_effective_date
Other manuals in Massachusetts: Boston Water and Sewer Commission, City of Cambridge, City of Springfield, Massachusetts, Massachusetts

Document Metadata

Jurisdiction level
City

No evidence cited

State
Massachusetts

No evidence cited

Version / edition
Third Edition / 2023 draft handbook mirror

No evidence cited

Adoption / effective date
Not found in document

No evidence cited

Last revised date
2023-12

No evidence cited

Relationship to state manual
adopts state manual directly

“Performance Removal Curves and the MassDEP pollutant removal credits – i.e., the EPA-PRCs and MassDEP pollutant removal credits assume that the SCM has been designed with proper pretreatment in accordance with the Appendix A Structural SCM Specifications and the Massachusett”

p. 30

Design Criteria

Design storm return periods (years)
2-year, 10-year, 100-year

No evidence cited

Water quality volume method
Required runoff depth multiplied by total post-construction impervious site area (MassDEP Stormwater Management Standards / Handbook). Includes recharge, TSS removal, and peak-rate attenuation standards.

“calculated as the required runoff depth multiplied by the total post-construction impervious site area”

MassDEP Handbook

Peak flow calculation method(s)
NRCS Technical Release WinTR20 Project Formulation Method, WinTR55 Small Watershed Hydrology Method

No evidence cited

Hydrologic/hydraulic software
WinTR-20, WinTR-55

No evidence cited

Approved BMP categories
Non-Structural, Structural Pretreatment, Structural Treatment, Structural Conveyance, Structural Infiltration, Structural Other

No evidence cited