Laserfiche WebLink
<br />do about it, I think it was their feeling that picking these <br />things up in storm sewer collection devices - namely catch <br />basins - and moving them to the lake - this was not going to <br />worsen the condition. It was not going to save or clean up <br />the lake, but not going to destroy the lake. We looked around <br />the city to see what we could do in the way of some entrapment <br />basins - some sor~ of filters - some sort of sedimentation de- <br />vices, and we found with what we had to work with there simply <br />wasn't available land. (Inaudible) in and purchasing residen- <br />tial property, converting those into sedimentation basins and <br />try to grow vegetation and clean up the water and this was de- <br />termined as an extremely high expense for solving this rather <br />small area. <br /> <br />It was, therefore, our conclusion this was not an economical <br />solution to the problem. We then tried to determine if there <br />isn't anywhere on the site - what else might be possible to help <br />this receiving body - namely, Lake Josephine. Therefore, we <br />looked at some other ways to try and aid this receiving body <br />and lengthen its life. As I explained before, this is the small <br />14 to 15 acres in the north we talked about, served by the exist- <br />ing pipe that goes out there now. This is the other 54 or 55 <br />acres that is under review. This is the one where we propose to <br />pick it up with a larger pipe and take it (inaudible). In addi- <br />tion to this area (inaudible) on Lake Josephine is 262 acres in <br />this area which is all storm sewered and goes out what is the <br />equivalent of a 60 inch pipe at this location. Beyond that, we <br />also have 180 acres draining into probably a 35 acre swamp or <br />so for a little over 200 acres here. This one then comes in <br />through a 24 inch - no, it's 36 inches - between this pond and <br />Lake Josephine. All together, these areas inside Roseville make <br />up approximatel~ half or 500 acres of 1000 acres that drain to <br />Lake Josephine. <br /> <br />In using the Rice Creek Watershed's analysis techniques of <br />determining how much phosphates and other nutrients are probable <br />(inaudible) coming off this land, we developed what size facili- <br />ties would probably be needed in the way of cattails, marsh, <br />settling basins, etc. to try and take out at least most of the <br />worst pollutants. There is no way we can take out all of every- <br />thing, but taking out at least the bulk of the worst things <br />which are the phosphates, silt and other nutrients, these are the <br /> <br />5 <br />