City of Killeen

Drainage Design Manual

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Body PDF; city also posts chapter amendments (2012/2013) that should be consulted for latest policy wording.

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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 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

November 8, 2011 (with later chapter amendments)

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Adoption / effective date

2011-11-08

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Last revised date

Not found in document

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Relationship to state manual

independent

“independent city drainage design manual”
Coverage note

Design Criteria

Design storm return periods (years)

25-year, 100-year

“Stormwater runoff peak flow rates for the 25- and 100-year frequency storms ... intercept, contain, and transport all runoff from the 25-year frequency storm”
§1.2 Drainage Policy

Water quality volume method

Streets/curbs/inlets/storm sewers designed for 25-year; convey >25-year through 100-year in ROW/easements. Detention: pre-developed 25-year peaks shall not be increased; 100-year passed via emergency spillway without overtopping. Rational / Variable Rainfall Intensity ≤200 ac; SCS for larger.

“Pre-developed peak flows generated from the 25-year frequency storm shall not be increased ... 100-year storm event shall be passed from the detention facility through an emergency spillway”
§1.2.8 Stormwater Detention

Peak flow calculation method(s)

Rational Method, Variable Rainfall Intensity Method (≤200 acres), SCS / HEC-HMS methods (larger areas), NRCS hydrograph routing for detention ponds

No evidence cited

Hydrologic/hydraulic software

Not found in document

No evidence cited

Approved BMP categories

Stormwater detention ponds, Retention / water quality controls, Storm sewers and inlets, Drainage channels

No evidence cited