09/02/2008 Council Packet - Laserfiche WebLink

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• • Supplemental runoff volume control requirements. The rule requires certain development and grading activities creating impervious surfaces to retain the runoff from a one -year precipitation event (2.3 inches of rainfall over 24 hours) where feasible. The rule outlines where achieving the standards may not be feasible and outlines an alternative BMP sequencing process for those areas, including: o Re- establishment of effectively drained wetlands o Upland restoration /conservation o Restoration of degraded wetlands o Impervious dis- connection, and /or o Soil amendments and deep tilling • Creation ofa runoff volume credit and banking system. This provision of the rule allows parties to receive credit for stormwater volume reduction measures that provide more attenuation than required under the rule. The rule lays out the conditions for establishing volume control credits and sets up a system for tracking and transfer of those credits within the City. A hypothetical example of the RMP permitting sequence for a development project is shown in Figure 2 -10. Future Local Water Management Plan Update The City's future plans for local surface water management planning activities are as follows: 1. Proceed with administration of Lino Lakes RMP rule. The rule was formally adopted by the RCWD on , 2008. It is noted that the RMP rule is likely to be adopted in late summer /early fall 2008. The City will be working with the RCWD to implement the rule and determine what, if any, adjustments need to be made in it to facilitate its administration. 2. Prepare an update to the City's local water management plan. The City intends to wait until after the RCWD has developed and adopted their next generation watershed management plan, since the requirements in that plan will affect the content of the City's plan. The RMP, RMP rule, and the RCWD rules are expected to provide an important foundation for the next update. The primary emphasis will be to write the City's next generation LSWMP to comply with the content and organizational requirements of Minnesota Statutes 103B and Minnesota Rule 8410, summarize, consolidate, and reference the pertinent information that has already been generated in the aforementioned sources, and develop supplemental information where necessary to fill in the gaps. Areas where supplemental information will likely be needed include: • Integration of MS4 SWPPP policies and goals • Expansion of system improvements to include non - structural elements as well • Preparation of cost estimates and timelines for improvements program • Integration of nondegradation elements into plan (pending completion of MPCA rule)