Agenda - Planning Commission - 05/03/2018

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BMP Summary Sheet MS4 Name: City of Ramsey Permit Condition: IV.D Section 303(d) listings Unique BMP Identification Number: IV.D — 1 BMP Title: Impaired Waters Review Process BMP Description: The City of Ramsey will review all discharges from our MS4 system to impaired waters, as defined by the current USEPA approved 303(d) list. Using the data from this review, we will determine if any changes to the existing stormwater system or BMPs are needed to minimize the impact of discharges from our MS4 to the impaired waters. If changes are needed the City of Ramsey will modify our SWPPP and submit these modifications to the MPCA with our current annual report. Measurable Goals: • The City of Ramsey has determined that discharges from our MS4 system enter the following impaired waters, as defined by the current USEPA approved 303(d) list: (Water Body, Impairment) o Mississippi River - Mercury in Fish Tissue, PCB in Fish Tissue o Rogers Lake - Aquatic Recreation o Rum River - Mercury in Fish Tissue • This determination was made using the Storm Sewer Map and citywide stormwater model. The mercury TMDL is being addressed state wide and it is assumed the discharge from Ramsey is not a source of mercury. The PCB in fish tissue TMDL plan has not been approved as of June 2008. The TMDL for Rogers Lake is not scheduled to start until 2015. • The Mississippi River and the Rum River are both classified as ORVW waters. A separate BMP Summary sheet has been prepared for Discharges to Waters with Prohibited or Restricted Discharges Assessment. • The watersheds, hydrology and impacts will be developed simultaneously for the Impaired Waters and Prohibited Discharge Waters. Timeline/Implementation Schedule: December 2008 May 2009 June 30 2009 Ongoing The City of Ramsey has identified the Rum River, Mississippi River and Rogers Lake as Impaired Waters receiving impacts from its MS4 discharges. A map has been prepared showing the Impaired Waters. A city wide stormwater model has been developed. The City will correlate the Impaired Waters watersheds with the stormwater model and will complete an evaluation of hydrology, land use and runoff. The City will evaluate changes to its storm sewer system to reduce the impacts to the Impaired Waters. The City of Ramsey will submit as an attachment to the Annual Report to the MPCA, the assessment, response to any public comments, plan for ongoing work elements and any proposed changes to the SWPPP that have been deemed necessary through this assessment process. The City of Ramsey will review, evaluate and incorporate changes to the SWPPP as TMDL goals are established and published for these waters. Ramsey Minnesota SWPPP -54- May 2006 February 2009