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Oklahoma Administrative Code (Last Updated: March 11, 2021) |
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TITLE 785. Oklahoma Water Resources Board |
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Chapter 46. Implementation of Oklahoma's Water Quality Standards |
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Subchapter 19. Implementation of Dissolved Oxygen Criteria to Protect Fish and Wildlife Propagation |
SECTION 785:46-19-2. Regulatory flows
Latest version.
- (a) The flow in the receiving stream, Qu, shall be deemed to be the greater of the 7Q2 or 1 cfs. If the 7Q2 is unknown, then Qu shall be deemed to be 1 cfs.(b) For industrial dischargers with adequate data as determined by the permitting authority, the effluent flow, Qe, shall be deemed to be the highest monthly averaged flow over the previous two years. For all other dischargers, the effluent flow shall be deemed to be the design flow.(c) Provided, in stream segments where dams or other structures have substantially affected the historic flow regime of the stream segment, including but not limited to the portions of the Verdigris and Arkansas Rivers constituting the McClellan-Kerr Arkansas River Navigation System, the appropriate regulatory low flow in the receiving stream, Qu, shall be as determined on a site-specific basis pursuant to properly designed and implemented hydrologic study approved by the permitting authority and the Board.