2011-10-06_AgendaPacket - Laserfiche WebLink

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October 3, 2011 Memo To: Board of Commissioners FROM: FOR SUBJECT: Management Responsibilities Proposed revised language for the Draft Plan: Groundwater The Grass Lake Watershed Management Organization is not interested in taking an active role in groundwater management at this point in time. Rather the GLWMO will support the activities identified in the DRAFT Ramsey County Groundwater Protection Plan (2009) and will continue to promote groundwater protection by: Conducting limited monitoring activities (e.g. collecting lake level data) Adopting a volume control standard that will increase groundwater recharge on new development and certain re- development projects taking place in the watershed - Adopting a pre- treatment standard for stormwater infiltration practices Flooding Given that the Cities of Roseville and Shoreview are responsible for the majority of the stormwater infrastructure and have floodplain ordinances and permitting authority, the GLWMO defers floodplain management and responsibility to address localized flooding issues to the member communities. The GLWMO will have the following limited role in flood management: Reduce the rate and volume of stormwater discharge to the GLWMO's waterbodies by developing rate and volume control standards Integrating structural solutions into the existing infrastructure of the GLWMO's member communities that address local flooding in a manner that does not increase flooding of downstream properties Lake Levels The GLWO will have a limited role in lake level management for the following reasons: (1) the GLWMO does not own or operate any of the outlet structures on the waterbodies of the watershed; and (2) the only waterbody that is augmented to maintain lake levels is Snail Lake. The Snail Lake Improvement District has been established to assist the City of Shoreview in managing lake levels on this waterbody.