07-10-2019 Council Minutes - Laserfiche WebLink

Home Browse Search

MINUTES CITY COUNCIL JULY 10, 2019 CONSENT Fischer introduced the following resolution and moved its adoption: AGENDA RESOL UTION NO. 2019-7-77 —APPROVING THE CONSENT AGENDA WHICH CONTAINS THE FOLLOWING: *APPROVAL OF THE VOUCHERS, The foregoing resolution was duly seconded by Torkelson. Ayes (5). Nays (0). Resolution declared adopted. TWIN LAKE UPDATE The City Administrator stated that the pumping operation has been successful so far and we are coming up on 30 days so the City needs to make some decisions for future action. The Public Works Director reported that the pumping progress on Twin Lake has been going well and on Monday the lake was at 873.0 feet. He explained that pumping is being done during daytime hours and only about four inches of water is through the pipe now. He showed photos of the pumping site when we started and how far down it is today. He reviewed the costs incurred so far with a 16- inch pump, installation costs and construction of the access road, which is estimated to be about $34,400, and future estimated costs with a smaller six- inch pump. The Public Works Director explained that the Watershed District found a tree had fallen and created a depression in the West Vadnais triangle wetland embankment, so that area is now sandbagged which has greatly reduced the amount of water flowing through the pipe between West Vadnais to Vadnais Lake. He stated that there is very little water coming from East Vadnais Lake now. The watershed district is working on a plan to potentially route overflow water from West Vadnais Lake around Twin Lake into the MNDOT Waldo pond. The Public Works Director explained that there are options for the Council to consider going forward. He reported that the DNR has ordered an Ordinary Highwater Mark Survey to be done, and once that number is established it is unlikely that the DNR will allow the lake to be pumped lower than that. He stated that going forward the City could maintain the current level of 873.5 feet using a six-inch pump. He explained that as long as water is not rushing in from Vadnais Lake, this level could be easily maintained with the smaller pump, but this level is only 2.5 feet below the lowest home on the lake. He noted that according to modeling by Barr Engineering, if the West Vadnais water is minimized and there is a four -day 100-year rain event, the low home on the lake would technically 2