Agenda - Public Works Committee - 03/31/2015

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The SWMP was reviewed by the EPB at their March meeting. They were in general agreement with the content of the SWMP. The SWMP will be reviewed by the Public Works Committee tonight. It will be the subject of a Public Hearing before the Planning Commission at their April meeting.with particular emphasis on the changes to City Code related to land use. The Public Hearing is required when considering changes to City Code. The SWMP will be brought to the City Council at the April 21 meeting for review and approval. The plan will we sent to the LRRWMO and the Metropolitan Council for concurrent review the first week of May. The LRRWMO has 60 days to review and approve the plan, the Metropolitan Council has 45 days for review. The document will be updated as necessary after the comments are received then brought back to City Council for adoption. This is anticipated to be the first meeting in August. Observations/Alternatives: The City of Ramsey is bordered on the east by the Rum River and on the south by the Mississippi River. The City has many wetlands, lakes and streams with in it's borders. Managing the discharge of storm water from developed sites is a critical component of preserving the water quality of the wetlands, lakes, streams and rivers in and adjacent to the City. The Surface Water Management Plan provides a frame work for allowing development while maintaining surface water quality. The changes to the document include: • Updating City Code references to the current system • Updating the Stormwater management requirements for new construction o Infiltrate first 1" of runoff from new impervious surfaces o Provide rate control and water quality treatment for the 2, 10 and 100 year return events. o Provide reduction for Total Suspended Solids and Total Phosphorus concentrations in stormwater leaving the site. o Update the reference storms to use the Atlas 14 publication. The LRRWMO adopted use of the Atlas 14 and required the member cities to adopt this standard. • Remove references to wetland buffers for new construction. The City completed a Wetland Management Plan with the 2008 SWMP. The implementation of the Wetland Management Plan was postponed by City Council Action. • Update the Stormwater Models to include developments constructed after 2008 and use Atlas 14 for rainfall events. • Update the tables and figures to include the new model results. Funding Source: Staff has performed the update to the plan as part of their normal duties. The Stormwater Utility Fund covers part of staff salaries. The plan lists Capital Improvement Projects that will need to be brought back individually for review and approval. Recommendation: Staff recommends the Committee approve the Surface Water Management Plan and forward it to City Council for approval. Action: Motion to approve the Surface Water Management Plan and forward it to City Council for approval. Attachments Form Review SWMP Inbox Reviewed By Date