2019-05-28_PWETC_Minutes - Laserfiche WebLink

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Member Hammer asked what efforts are being made to rehab the plant life around the ponds, in terms of filtration. Mr. Johnson stated there is not a good echo system established. A lot of the ponds were established in the fifties through seventies. From an eco -system side, it is not great and one of the components the City has looked at when doing smaller project restorations is to go through and use more native seeds to try to establish something that has a little more benefit. Chair Cihacek asked if the impervious surface that feeds into this pond is reduced, would it benefit the capacity for this pond. Mr. Johnson stated that was correct. Volume rate would decrease. Vice Chair Wozniak asked if a place like Von Marr in Roseville, is the added storage capacity equal to the Von Marr footprint or should the City go beyond that. Mr. Freihammer stated for example in Rice Creek Watershed, all of Rice Creek has to go an additional twenty percent. Mr. Johnson stated once a business hits ten thousand feet of impervious surface, it all has to get modeled to show at least a twenty percent decrease in the rate. Just because it is in the Rice Creek Watershed District flood plain and this all drains up to Jones Lake, which is the Watershed's primary concern once it leaves Roseville. He stated the City does see a lot of improvement; stormwater wise when there are big redevelopments. Mr. Johnson continued with his presentation on Chloride and street sweeping. Vice Chair Wozniak asked what percentage of the salt that Roseville uses rock salt. Mr. Johnson Roseville uses mostly the rock salt. The City does use a lot more brine and wetting the salt before putting down to try to activate it faster, so less is used. Member Huiett asked if sand was not as effective salt. Mr. Johnson stated sand and salt are two different processes. Salt is really good at melting, getting it down to pavement and sand is good for traction. If sand is put down salt is usually not put down because it's kind of defeats the purpose. Mr. Johnson reviewed shredding day and recycling stats for 2018. He also reviewed tips for residents that were in the report. Vice Chair Wozniak asked if the tip information has ever been posted online or in the newsletter for residents.