05-26-2020 Council Packet - Laserfiche WebLink

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CITY COUNCIL WORK SESSION DRAFT 3 City Engineer Hankee explained that the drainage areas to pond remain the same. She 83 doesn’t have the numbers tonight on volume change but the way the pond works is that 84 you have acres of impervious surface being added that will cause the water to flow more 85 quickly; it mo ves to a pond and it leaves the site from there; a larger pond lowers the rate. 86 Ms. Broussard asked at what point the water starts moving toward the dissipater Ms. 87 Hankee explained at what point the water would flow from the pond (as indicated in the 88 plans). Ms. Broussard wondered if they will have constant flow to their property. 89 City Planner Larsen noted, regarding the utility staging, that the property would be 90 included in the 2025 to 2030 area. 91 Councilmember Cavegn noted the issue of erosion that lays with the property owner. He 92 sees that as a burden and perhaps unfair. He wonders if there are other options. City 93 Engineer Hankee explained that the applicant has met the requirements for storm water 94 management; the runoff rates to that site are being reduced. She wants to better 95 understand the concern. Councilmember Cavegn explained that there is a large amount of 96 water flowing to a certain amount of property and he believes that the concentration of the 97 flow will cause erosion. Ms. Hankee said the rate will be controlled with the ponding 98 system whereas currently it would come all at once; there shouldn’t be a large surface 99 flow. Councilmember Cavegn asked if there are currently erosion issues and Mr. Vickers 100 explained the current situation and his concern about where the dirt will land and he 101 believes that it will be in the ditch and in turn the water in the ditch will be elevated. The 102 impact will be on the yield of crops planted on his property. It isn’t right for him to incur 103 the cost of maintenance. Ms. Hankee explained that the dissipater will take out the 104 sediment, noting that is what has happened in fact in the NorthPointe area. Community 105 Development Director Grochala said he believes the concern is erosion caused from the 106 dissipater to the ditch and will that cause erosion; he believes there can be information 107 provided to ensure that isn’t a problem. Mr. Grochala suggested an easement in a certain 108 area to the City of Lino Lakes to ensure that maintenance occurs. Ms. Broussard 109 explained that any easement has to receive consent of Xcel Energy as well as the 110 watershed district; past that, she thinks that something they would discuss. 111 Mayor Rafferty noted that the developer has an engineer providing information that is 112 reviewed by the City’s engineer. Staff is suggesting an easement agreement to ensure 113 certain maintenance. He is interested in seeing the resident’s concerns addressed. 114 Community Development Director Grochala said staff will explore the easement and 115 address the residents’ concerns. 116 Councilmember Lyden wondered if this development would be a better quality of 117 neighborhood if it were zoned R1x; his personal preference is that. Also, on the park, he 118 doesn’t think it’s realistic for kids to travel across 20th Street to a park. His suggestion is, 119 in the first staging area, leave a couple of pads as open space initially and until 120 development of a park. Another concern is that cul de sacs are limited in length by city 121 ordinance and he believes this development is in violation. Mayor Rafferty noted that the 122