City of Pasadena
Harris County Low Impact Development & Green Infrastructure Design Criteria for Storm Water Management
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Compare each cited field to the official PDF before relying on it. What this means
Municipality coverage via Harris County LID/GI SWQ criteria (Houston metro pattern). Prefer city-specific drainage criteria PDF if found.
Fields not found in document: design_criteria.design_storm_return_periods_years
Other manuals in Texas: City of Amarillo, City of Arlington, City of Austin, City of Beaumont / Jefferson County Drainage District No. 6, 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 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
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State
Texas
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Version / edition
Adopted April 2011
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Adoption / effective date
2011-04-01
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Last revised date
2011-04-01
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Relationship to state manual
adopts state manual directly
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Design Criteria
Design storm return periods (years)
Not found in document
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Water quality volume method
Projects exceeding one acre require a Storm Water Quality (SWQ) Permit and SWQMP; treat the first 1 inch of runoff. LID IMPs may satisfy quality and detention credits per Harris County criteria. Conventional gravity detention minimum rate 0.55 ac-ft per acre.
“treat the first 1 inch of runoff”
Harris County LID/GI Design Criteria
Peak flow calculation method(s)
Detention and hydrograph matching per HCPID-AED / HCFCD requirements, Minimum detention 0.55 ac-ft/acre for gravity systems
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Hydrologic/hydraulic software
Not found in document
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Approved BMP categories
Bioretention systems, Vegetated swale / bioswale, Permeable pavement, Rainwater harvesting, Green roof, Filter strips / tree box filters
No evidence cited