4.3.5 Infeasibility Criteria

Dispersion BMPs are considered infeasible in the following circumstances:
  • Where sheet flow cannot be maintained.
  • Areas without sufficient pervious vegetated areas.
  • Maximum slopes of contributing impervious areas exceed the recommended maximum slopes for each dispersion BMP type, as discussed above.
  • Dispersion area located in or near a geological hazard area without prior evaluation by a geotechnical engineer or qualified geologist.


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