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Manual Notice: 2016-1

From: Rene Garcia, P.E.

Manual: Hydraulic Design Manual

Effective Date: July 01, 2016

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Purpose

To implement new research and best practices.

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Contents

The following updates were made to the Hydraulic Design Manual:

Chapter 4 – Hydrology

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  • Section 12 – Updated Rainfall Intensity narrative to reference new EBD rainfall coefficients.
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  • Section 13 – Updated Empirical Dimensionless Hyetograph narrative to include reference to spread sheet tools.

Chapter 8 – Culverts

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  • Section 13 – Modified language to revise culvert minimum maintenance velocities from 2 fps to 3 fps.

Chapter 10 – Storm Drains

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  • Section 1 – Modified language to include a discussion requiring a sheet flow analysis for all storm drain projects.
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  • Section 2 – Modified design checklist to include a sheet flow analysis.
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  • Section 2 – Modified language to revise storm sewer minimum maintenance velocities from 2 fps to 3 fps.
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  • Section 7 – Revised Figure 10-18 to show manholes at junctions.
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Supersedes

The revised manual supersedes prior versions of the Hydraulic Design Manual.

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Contact

Please direct any questions about this manual to Stan Hopfe, P.E., CFM at (512) 416-2219 or Stan.Hopfe@txdot.gov.

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Archives

Past manual notices are available in a PDF archive.

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