Transcription of Chapter 6 Storm Drains - Washington State …
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Chapter 6 Storm Drains - Washington State …
Chapter 6 Storm Drains 6-1 Introduction A Storm drain ( Storm sewer) is a network of pipes that conveys surface drainage from a surface inlet or through a manhole, to an outfall. Storm Drains are defined as closed pipe networks connecting two or more inlets, see Figure Storm drain networks typically consist of lateral(s) that discharge into a trunk line. The trunk line then receives the discharge and conveys it to an outfall. Storm Drain Structure Figure While configurations like the one shown in Figure are typical, there are also other configurations that do not meet the Storm drain definition as shown in Figure In cases where there is only one inlet and no more than two pipes, this should be classified as a culvert on the plan sheets and designed as follows: 1. Storm drain that does not require pressure testing. 2. Lateral that does not require pressure testing. WSDOT Hydraulics Manual M Page 6-1. June 2010. Storm Drains Chapter 6. 3. Storm drain that does require pressure testing.
Page 6-4 WSDOT Hydraulics Manual M 23-03.03 June 2010 Storm Drains Chapter 6 can cause abrasion in the pipes. For velocities approaching or exceeding
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