City of Beaumont / Jefferson County Drainage District No. 6
Drainage Criteria Manual
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Drainage/detention criteria manual — limited explicit WQv; confirm Beaumont city post-construction water-quality standards separately.
Other manuals in Texas: City of Amarillo, City of Arlington, City of Austin, City of Brownsville, City of College Station, City of Corpus Christi, City of Denton, City of El Paso, City of Fort Worth, City of Frisco, City of Garland, City of Grand Prairie, City of Houston, City of Killeen, City of Laredo, City of Lubbock, City of McAllen, City of McKinney, City of Mesquite, City of Pasadena, City of Pearland, City of Plano, City of Round Rock, City of San Antonio, City of Waco, Dallas / North Central Texas (iSWM), Harris County, Tarrant County, Texas, Texas Commission on Environmental Quality
Document Metadata
Jurisdiction level
City
No evidence cited
State
Texas
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Version / edition
July 2025 Update
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Adoption / effective date
2025-07-01
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Last revised date
2025-07
No evidence cited
Relationship to state manual
independent
No evidence cited
Design Criteria
Design storm return periods (years)
2-year, 5-year, 10-year, 25-year, 50-year, 100-year
“10-year, 25-year, 50-year, and 100-year peak flow runoff within the boundaries of subdivisions and developments”
Drainage Regulation intent
Water quality volume method
DD6 Drainage Criteria Manual focuses on peak-flow conveyance and on-site detention/retention using Atlas 14 rainfall (10-/25-/50-/100-year 24-hour distributions). Explicit post-construction WQv depth is not a primary DD6 criterion; City of Beaumont MS4 SWMP is separate. Where City of Beaumont criteria conflict with DD6, the more restrictive applies.
No evidence cited
Peak flow calculation method(s)
NOAA Atlas 14 precipitation-frequency (Texas Vol.11), Rational Method intensity coefficients (Table 4-3), On-site detention/retention routing (Ch.10), 10-/25-/50-/100-year peak flow conveyance within and from developments
“hypothetical 24-hr, 10-year, 25-year, 50-year, and 100-year storm rainfall distribution based on the Atlas 14 report”
Hydrologic Design Criteria
Hydrologic/hydraulic software
Not found in document
No evidence cited
Approved BMP categories
On-site detention basins, Retention facilities, Open channels / storm sewers, Outfall / energy dissipation
No evidence cited