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7/17/2007 9:09:04 AM
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4/23/2005 5:20:16 PM
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Roseville City Council
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Council Resolutions
Resolution #
6267
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<br />things causing your large algae growth and causing the lake to <br />go downhill. <br /> <br />We looked at numerous ways. One way we looked at was to <br />say, okay, we're dealing with this area up here. Let's just <br />think about this 55 acre piece for a minute. Instead of taking <br />it out to the lake here, the way it does now, if instead we <br />took it easterly along Josephine. Was there some way we could <br />get it to this pond which does have a large amount of cattails <br />and marsh grass and shall serve as a settling basin. We had <br />two problems. First we had this large sewer that already exists <br />and no way to get over it or under it, so we said we will have <br />to intercept it. We found when we got to the pond that the pond <br />is too high for the water. Water will only run down hill so we <br />can't get into it. That means we would have to pump so we made <br />an estimate of what it would cost to put in a very huge pumping <br />facility at this location which would then pump this and give <br />it enough force to get into the receiving body. We would also <br />have to purchase this acre and a quarter of swamp here. It's <br />private land but it naturally could be purchased at the right <br />price, so we would use this as a surging basin, put in huge <br />pumps and pump to this location. This would run the cost up to <br />a rough $300,000 in addition to the storm sewer construction, <br />this is another $350,000. We said, that's this 55 acres. Let's <br />look at the other 15. We looked at this. We would have to inter- <br />cept (inaudible) carry down here to become part of this system. <br />Again we'd have to pump it because it wouldn't run uphill into <br />this pond. This would increase the cost maybe another $20,000. <br />So again we're talking in the mid $300,000 range and neither one <br />of these looked particularly promising, especially because of the <br />pumping station. We not only have a huge expense up front, but <br />this would be quite an expense forever and ever. We said, that's <br />one approach. Another approach would be to take the 55 acre site, <br />carry it into the sewer much like last time, but rather than (in- <br />audible) intercepting in this huge site, but we would go back to <br />this location and intercept this sewer and carry it to a pipe <br />across Lexington here because there we carry it by gravity. By <br />taking this across this way we can eliminate this huge pumping <br />station and we can use this small surging basin here to purify <br />this smaller area. This is 55 acres versus 262 and then we can <br />use this existing pipe as the input location for Lake Josephine, <br />and using that approach we end up with a cost of about $125,000 <br />added cost. <br /> <br />6 <br />
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