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218 At the request of Member Seigler, Mr. Johnson advised that if the city did not 219 submitthis annual permit and report, the city would be subjectto fines and negative 220 comments from the Minnesota Pollution Control Agency (MPCA). 221 222 Mr. Johnson's presentation included best management practices (BMP's) used by 223 the cityfor various projects to reduce stormwater volume and improve water quality 224 (e.g. erosion controls including silt fences or bio -rolls); negative nutrient concerns 225 for water quality involving phosphorus and chloride with the city continually 226 monitoring salt use in the winter months for pavement ice control. Mr. Johnson 227 reviewed the monitoring and use of smarter technologies based on pavement 228 temperatures for ice control, opining that the City of Roseville had one of if not the 229 best system in the metropolitan area with every pound of salt used on roadways 230 tracked and measured before and after snowfalls to provide data on what was used 231 and track trucks and their routes. As the city's transportation expert, Mr. Johnson 232 suggested a future presentation by Public Works Director Marc Culver. Mr. 233 Johnson noted the availability of stormwater pond mapping for real-time 234 maintenance data, including depths, volumes and other data that provided timing 235 information for excavation and removal efficiencies and results. 236 237 As examples, Mr. Johnson noted the stormwater management efforts at Twin Lakes 238 Parkway resulting in improvements to Langton Lake via use of iron -enhanced sand 239 to remove as much phosphorus as possible as one of several options. Mr. Johnson 240 and Mr. Freihammer also noted another example at Alameda Pond and existing 241 unique pre -case round structures that had been installed in the past versus the 242 considerable higher construction costs if installed today. Given the uniqueness of 243 these structures, Mr. Johnson noted that retrofitting them proved challenging and 244 required staff thinking outside the box in some cases to help reduce contaminants 245 and make those ponds work better. 246 247 Mr. Johnson referenced atable providing projects and estimated total costs, as well 248 as identifying priority projects within that list and costs to address and implement 249 the city's surface water management plan. 250 251 At the request of Chair Cihacek, Mr. Freihammer advised that the city typically 252 budgets $700,000 annually in the CIP for stormwater mitigation, with grant funds 253 sometimes available for aparticular project, or cost-sharing with watershed districts 254 or other jurisdictions, including costs for maintenance of ponds prone to flooding. 255 256 Mr. Johnson's presentation included annual citywide clean-up day statistics from 257 2003 — 2017, with cost breakdowns available since 2013, and identified 258 partnerships with various agencies and vendors to help reduce city costs. Of 259 particular interest this year, Mr. Johnson noted the considerable number and major 260 expense in disposing of mattresses dropped off. Mr. Johnson noted that the number 261 of bikes dropped off had increased this year, advising that some were only usable 262 for parts, but 16 of those collected this year were recycled by avendor, at no charge, 263 and put back on the road after some rehabilitation. Page 6 of 9