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The outfall of a storm drain system should be to an existing low or proposed channel.
The discharge velocity from the outfall should not cause erosion to the existing low
or proposed channel. Velocity controls should be used when erosion is possible of
the existing low or proposed channel. The outfall of the storm drain should be positioned
in the existing low or proposed channel in the downstream direction to reduce the
turbulence and erosion. The design engineer should meet with TCI Storm Water Division
to discuss a solution, if a defined low does not exist for the discharge of the outfall.
Should the discharge from an outfall cross a sidewalk area, discharge will not be
allowed over the sidewalk. A channel section will be provided under the sidewalk.
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