§ 105.242. Channel alignment and cross section.
(a) Abrupt bends in channel changes are prohibited, unless necessitated by the alignment of existing bridges or encroachments.
(b) The relocated channel shall rejoin the natural channel of the stream at a point on the permittees property to insure that alignment of stream flow at the downstream property line is identical to the flow alignment prior to the channel change.
(c) A grade of the changed channel shall not be significantly greater than or significantly less than the grade of the original channel, unless the length of the relocated channel requires.
(d) Where the width of a channel change is greater than the width of the preexisting channel, provision shall be made to assure proper depth and velocity of normal flows, subchannels and installation of stream habitat improvement devices.
(e) In streams having substantial fisheries value, provision shall be made in channel changes to maintain existing pool-riffle ratios.
The provisions of this § 105.242 adopted September 26, 1980, effective September 27, 1980, 10 Pa.B. 3843.
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