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C525
Urban Drainage Design for Transportation Facilities – Part One

Vincent D. Reynolds, MBA, PE

The largest contributor to drainage and surface runoff is precipitation resulting from the hydrologic cycle. During the hydrologic cycle precipitation falls to the ground as either rain or snow. Other causes of surface runoff are manmade. There are several methods available to calculate the flow rate of Stormwater; among those are the USDA SCS method and the rational method. Several variables are included in those methods; among those are surface type, drainage area, soil type and the time, duration and intensity of rainfall.

Urban runoff on transportation facilities includes runoff from offsite watersheds, pavement runoff, runoff from roadside channels and runoff through closed drainage systems. Designing an efficient stormwater system is a goal that is shared by the designers of transportation facilities.

There are several ways to control urban runoff some of which will be discussed in this course.

This course Urban Drainage Design for Transportation Facilities will cover the design of storm drainage facilities associated with transportation facilities - Part One of this course will cover hydrologic procedures, pavement drainage, drainage structures, closed and open drainage systems. Part Two will cover detention and retention facilities, pump stations, water quality practices and temporary erosion and sediment control practices.

This course material is based on the document “Urban Drainage Design,” as published on the website of the Federal Highway Administration (FHWA).

This course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of the course materials.


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NY PE & PLS: You must choose courses that are technical in nature or related to matters of laws and ethics contributing to the health and welfare of the public. NY Board does not accept courses related to office management, risk management, leadership, marketing, accounting, financial planning, real estate, and basic CAD. Specific course topics that are on the borderline and are not acceptable by the NY Board have been noted under the course description on our website.

AIA Members: You must take the courses listed under the category "AIA/CES Registered Courses" if you want us to report your Learning Units (LUs) to AIA/CES. If you take courses not registered with AIA/CES, you need to report the earned Learning Units (not qualified for HSW credits) using Self Report Form provided by AIA/CES.

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