Hydraulic Design Advisory
Hydraulic Design Advisories (HDA’s) are informational documents issued to
address specific hydraulic or drainage design technical issues or concerns. The
issuance of the HDA’s is on an as needed basis and they will be posted at this
site until such time the information contained there in has been incorporated
into the VDOT Drainage Manual, the Location and Design II&Ms, the VDOT Road and
Bridge Standards, or other such documents as appropriate. All previously
published HDA’s not listed below have been accordingly voided and are no longer
in effect.
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Consideration of Flood Plain Storage in the Design of Drainage Facilities |
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Change in Procedure for Determining Mean & Low Tide Elevations (Revised 3/24/08) |
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DOT's Adoption & Implementation of NOAA ATLAS 14 Rainfall Precipitation Frequency Data *DOWNLOAD FILE -Microsoft EXCEL spreadsheet file containing "B, D, & E" factors referenced in Hydraulic Design Advisory (HDA) 05-03 |
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Application of NRCS' "TR-55" ,"TR-20", EFH -2 Hydrologic Computations Using NOAA ATLAS 14 Rainfall Data (Revised 2/08) * DOWNLOAD FILE - Microsoft EXCEL spreadsheet file containing NRCS' implementation of NOAA ATLAS 14 24-hr total point rainfall data for Virginia (and appropriate county zone maps) as presented in Hydraulic Design Advisory (HDA)05-04.2. |
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Dan Anderson Peak Discharge Determinations - Procedural Revision |
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Road and Bridge Standard PC-1 Polyethylene (PE) Corrugated pipe |
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Scour Considerations for Three-sided Drainage Structures |
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Culvert Outlet Protect
Road and Bridge Standard EC-1 (Revised 9/07) |
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Recommendations for Mannings "n" Values for VDOT Standard Riprap Sizes (Revised 11/06) |
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Erosion and Sediment Control Plan Details (Revised 11/06) |
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| Stormwater Management Plans | |
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Countersinking Considerations for Single and Multiple Barrel Culverts. |
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Allowable Pipe Materials For Storm Sewer Systems |
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Guidelines for the Design and Acceptance of Roadway Causeways |
Page last modified: Monday, March 24, 2008
