5.1 Regulatory Program

As discussed in Section 2.3 above, the subwatershed is mostly developed.  Future development is expected to contribute some additional stormwater volume and phosphorus loads to Gleason Lake but the new loading and volumes expected are small compared to the impacts from existing development.  Future redevelopment may provide more opportunities to reduce pollutant loading from the subwatershed.  To mitigate these future impacts and to address other goals such as increased infiltration, wetland management, and improved ecological integrity, additional regulation may be necessary.  A decision on rulemaking needs/standards can only be made after the formal rulemaking process.  In addition, further amendments to the Rules should not be precluded by the content of the plan.

Additional regulatory controls on permitted development and redevelopment will be considered for this subwatershed to add volume management and infiltration requirements and implement wetland management in accordance with management classification.  Regulations providing an incentive such as a volume reduction credit to developers to maintain undisturbed areas, reforest, or plant native vegetation may be considered.

The following are revised or additional regulatory controls in this subwatershed that would be necessary to assist the District in meeting the goals of this Plan:

  1. Amend existing or establish new District rules requiring abstraction of the first one inch of rainfall on new permitted development and redevelopment.
  2. Provide regulatory constraints and incentives for the conservation of undisturbed native vegetation as sites develop.
  3. Amend existing or establish new District rules requiring greater than 50 percent phosphorus removal on new permitted developments within the Gleaons Lake subwatershed
  4. Amend District rules to incorporate a requirement for stormwater management plan approval prior to submittal of a preliminary plat.
  5. Amend existing or establish new District rules requiring submittal of a functions and values assessment for all proposed wetland impacts requiring a permit; mitigation of all fill in Preserve category wetlands; and specifying by management classification stormwater discharge pretreatment, buffer, hydroperiod, and other wetland standards.
  6. Establish new District rule requiring an additional level of analysis and review of permitted development and redevelopment where there is a potential to adversely impact groundwater connected to a surface water feature.
  7. Require pretreatment of stormwater discharged to wetlands or infiltration areas in the in the areas of high aquifer sensitivity.