Manual Notice: 2019-1

From:
Camille Thomason, P.E.
Manual:
Hydraulic Design Manual
Effective Date:
September 12, 2019
Purpose
To implement new research and best practices.
Contents
The following updates were made to the
Hydraulic Design Manual:
Chapter 4 – Hydrology
  • Section 2 – Added brief discussion on significant digits.
  • Section 9 – Updated Statistical Analysis of Stream Gage Data with new release of USGS Bulletin 17C.
  • Section 10 – Updated mean annual precipitation map for use in Regression equations.
  • Section 11 – Minor edits to time of concentration (Tc) guidance.
  • Section 12 &13 – Updated to NOAA Atlas 14 rainfall data.
  • Section 13 – Update on Rainfall Temporal Distribution based on NRCS guidance.
  • Section 13 – Added additional Peak Rate Factor (PRF) guidance.
Chapter 15 – Coastal Hydraulic Design
  • Added a new chapter providing guidance for designing or evaluating coastal hydraulic transportation infrastructure projects.
Supersedes
The revised manual supersedes prior versions of the
Hydraulic Design Manual.
Contact
Please direct any questions about this manual to Ab Maamar-Tayeb, P.E., CFM at (512) 416-2328 or
Abderrahmane.MaamarTayeb@txdot.gov
.
Archives
Past manual notices are available in a
PDF archive
.