Prince Georges County

Maryland Stormwater Design Manual (county implements ESD to MEP)

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County-level coverage using Maryland SWM Design Manual Volume 1 (ESD to MEP). Local Prince George's supplements not separately ingested. Pipeline excerpt repair removed 1 unlocated citation(s).

Fields not found in document: document_metadata.adoption_or_effective_date, document_metadata.last_revised_date, document_metadata.version_or_edition

Other manuals in Maryland: City of Annapolis, City of Baltimore, City of Rockville, Maryland, Maryland

Document Metadata

Jurisdiction level

County

“5.2 7.4 Montgomery 2.6 3.2 5.1 7.2 Prince George’s 2.7 3.3 5.3 7.4 Queen Anne’s 2.7 3.3 5.3 7.5 St. Mary’s 2.8 3.4 5.4 7.7 Somerset 2.9 3.5 5.6 8.1 Talbot 2.8 3.4 5.3 7.6 Washington 2.5 3.0 4.8 6.7 Wicomico 2.9 3.5 5.6 7.9 Worcester 3.0 3.6 5.6 8.1”
pp. 48–49

State

Maryland

“State of Maryland”
TOC

Version / edition

Not found in document

No evidence cited

Adoption / effective date

Not found in document

No evidence cited

Last revised date

Not found in document

No evidence cited

Relationship to state manual

adopts state manual directly

“adopts_state_manual_directly — Maryland SWM Design Manual ESD to MEP”
Coverage note

Design Criteria

Design storm return periods (years)

1-year, 2-year, 10-year, 100-year

“1, 2, 10, 100 year design storms (Maryland SWM Design Manual)”
Design criteria

Water quality volume method

WQv is calculated as (P)(Rv)(A)/12, where P is the rainfall depth (1.0 inch in the Eastern Rainfall Zone, 0.9 inch in the Western Rainfall Zone), Rv is the volumetric runoff coefficient (0.05 + 0.009 * I), and A is the site area in acres.

“WQv is calculated as (P)(Rv)(A)/12, where P is the rainfall depth (1.0 inch in the Eastern Rainfall Zone, 0.9 inch in the Western Rainfall Zone)”
WQv chapter

Peak flow calculation method(s)

TR-55, TR-20

“computer program fps feet per second TR-55 Technical Release No. 55 Urban Unit Hydrology for Small Watersheds hf head above filter bed TSS total suspended solids HSG hydrologic soil group Vf filter bed volume Ia initial abstraction Vr volume of runoff I percent impervious cove”
pp. 36–38

Hydrologic/hydraulic software

TR-20, TR-55

“computer program fps feet per second TR-55 Technical Release No. 55 Urban Unit Hydrology for Small Watersheds hf head above filter bed TSS total suspended solids HSG hydrologic soil group Vf filter bed volume Ia initial abstraction Vr volume of runoff I percent impervious cove”
pp. 36–38

Approved BMP categories

Stormwater Ponds, Stormwater Wetlands, Infiltration Practices, Filtering Systems, Open Channel Practices, Non-structural Practices

“How to Use the Manual The Maryland Stormwater Design Manual is provided in two volumes. This first volume provides designers a general overview on how to size, design, select and locate BMPs at a new development site to comply with State stormwater performance standards. The”
p. 31